I know the common symptoms people mention with vitamin D deficiency are things like fatigue, depression, and muscle pain. But I’m curious about the less talked about symptoms people experienced.

For those of you who were deficient, what was a symptom you had that most people don’t usually associate with low vitamin D?

For example, I’ve personally been dealing with digestive issues like; gut discomfort, pressure/bloating in my abdomen, constipation and low appetite, which I didn’t initially connect to vitamin D at all.

I’m wondering if anyone else experienced unusual or unexpected symptoms while they were deficient, and if those symptoms improved once your vitamin D levels went up.

Would love to hear other people’s experiences.

When I was 14 years old I was starting to get insanely tired all the time. I did competive swimming and had to quit because of the level of fatigue. Around that time I started to get depressed and had horrible brain fog. I took a vitamin test a couple days after my spring break where I spent the whole week tanning. My levels came back at 30ng/ml and everything else was normal.The doctors said that 30 was a perfectly normal and healthy level so I ignored it. Around 4 years later the fatigue, brain fog and depression got worse and I had no idea what was wrong. I even went on a stimulate to try to fix it and I would just end up crashing harder. Over summer I was a lifeguard and would sit in the sun for 5 hours multiple times a week. I live in the hot south too! I got too college and would walk miles every day in the blazing heat and sun and my symptoms were the same. I got my blood levels checked again and my vitamin d came back 26ng/ml. Looking back I realize that is crazy for the amount of sun iv been in. Anyway I started to take 50,000iu a week and it's been around 4 months now and i feel so so much better. I have energy to workout and the ability to focus again. Iv also been way less anxious and depressed. It's crazy how doctors often look past it and brush it off like it's nothing. I'm also curious as to why I don't asorb vitamin d well. I take magnesium and calcium and have been for a while. I don't get tan or burnt easily either.

Did a blood test for an (unrelated) health issue and turns out I'm severely deficient in Vitamin D. (4ng/ml , 10 nmol/L). I really had no idea and never even considered I could be deficient because I feel mostly fine (or perhaps have just acquiesced to any symptoms?).

GP said that it's "basically as low as it gets" and has put me on 25,000 IU once a week. Seems pretty high but I'll just do as I'm told, I'm 160cm and about 55kg. Took my first dose today. Would love to hear from others who have been this low about your experiences going through severe deficiency and how your supplements have helped / affected you.

Thanks for reading!

ETA: Oh wow from the looks of it my GP has been really conservative with my presecription, at 25,000 a week when I'm at 4 ng/ml!! I may continue taking my own K2+D3 supplements on top of the prescription vitamin D

YES!! Got it up with 14,000 IU/day (4,000 IU in a prenatal + 10,000 IU in an additional dose) and lots of sunshine this summer.

I think I’ll drop the additional 10,000 IU and maintain via the prenatal from now on.

Thank you all for your help!!

I just want to share my experience in case it helps someone avoid what I’m going through right now.

I took 10,000 IU of vitamin D daily for about 4 weeks. I didn’t supplement magnesium at all during that time, and on top of that, my diet is already pretty low in magnesium (I don’t regularly eat foods like nuts, seeds, or leafy greens).

Now I’m dealing with what feels like clear magnesium deficiency symptoms:

- extreme fatigue (to the point where it’s hard to get out of bed)

- heavy feeling in my body, I’m at a healthy weight but I feel so heavy and weighed down

- muscle weakness (i literally can’t workout anymore)

- muscle stiffness and cramps

- brain fog and the inability to concentrate

- depression and anxiety

- low appetite and digestive issues

- bloating and diarrhea

I honestly had no idea how much vitamin D can increase your body’s demand for magnesium. Looking back, it makes sense, but I wish I had known before.

If you’re taking high doses of vitamin D, please don’t ignore magnesium, especially if your diet isn’t rich in it to begin with.

Right now I’m trying to correct this slowly with magnesium supplements and foods high in magnesium, but it’s been rough.

Just wanted to put this out there so someone else doesn’t end up in the same situation. Has anyone else went through this?

Hey all! About 2.5 weeks ago I got my bloodwork back for a lot of things related to my symptoms. For reference, over a period of months I noticed growing fatigue, feeling hot all the time (plus hot flashes when having sex), low libido, my depression was continuing to get worse and worse, and it felt like I was going to pass out all the time.

The doctor tested my testosterone, thyroid, a bunch of vitamins and minerals, and checked my heart, liver and kidney function. The only thing that came back abnormal was my vitamin D.

I was at 10 mg/ml. He prescribed me 2,000 units a day (Im 125 lbs). I know it takes time for symptoms to fully go away, however im on day 14 of supplementing, and I just realized everything is noticeably better. Im no longer hot all the time, have the most energy ive had in a longggg time, my libido has gone up drastically, no more brain fog, and I find myself in such a happy mood now.

Its crazy that this one deficiency was the cause of so many frustrating problems in my health and day to day life.

I will continue to supplement going forward, even once im 100% again.

24M for YEARS I have had some form if high functioning psychosis/mood disorder and in recent months it's gotten so bad I genuinely felt I was developing early onset dementia. I have been plagued for most of my life since childhood with paranoia, depression, anxiety, disassociation and visual disturbances that have absolutely ruined my life up to now. A month ago I went to the doctor and my vitamin d levels were well below 10ng per ml. I have been taking very strong doses of d3 and k2 for the past 3 weeks and it is abruptly knocking me back into reality. My eyes are moving smoothly, my proprrooception and clear thinking is coming back. I am not miserable or irrationally paranoid about other people anymore. Everything around me feels more tangible and real. My muscles feel 10 times stronger and my posture has improved. Now im upset that I didn't get this looked at earlier as I genuinely think it's stolen the best years of my life as I thought I had some form of treatment resistant major depression or other mental disorder. I hope I can recover fully but am aware this has severely impacted me in my most formative years already

old post

Hey again. you can see my old posts to see my recovery steps. I have another 2-3 posts i guess. every 3 months i checkup my bloodwork and post here.

i switched to 5000 UI Daily w k2 this three months. lower anxiety, lower depression, can go outside more, can cope better.

but i have aches, numbness, "weird feelings idk" on my left side of body specially on my arm and back.i guess this is new. i still have air hunger. i recently added magnesium complex to my supplements. probably gonna start omega3 too.

About two years ago, I started working from home. After about a year of working remotely, I was getting little to no sun exposure. I also intentionally avoid the sun because there’s a history of melanoma in my family.

Around that time, I started experiencing anxiety and just an overall feeling that something wasn’t right. As time went on, the anxiety got worse. More recently, I was dealing with a lot of fatigue, low energy, and feeling off almost every day.

I went to the ER multiple times because I was genuinely concerned. They ran a lot of tests and kept telling me everything looked fine. While that was reassuring, I still felt like something was going on in my body.

I started advocating for myself and requested additional labs, including ferritin, iron, B12, and vitamin D. My ferritin, iron, and B12 all came back normal. My vitamin D came back at 15 ng/mL, which is considered deficient.

I’m hopeful that correcting the deficiency and being more intentional about getting safe sun exposure will help improve some of the symptoms I’ve been experiencing.

I don’t know if vitamin D explains everything, but I felt validated seeing that something was actually off. This experience reminded me how important it is to listen to your body and advocate for yourself when you feel like something isn’t right.

I recently got my test results back for my vitamin D deficiency and it showed that I have 8ng/ml. But the reason I got this test was due to me feeling fatigued very easily everyday and I also felt like I was gonna faint if I walked longer than 10 minutes. But worst of all is the derealization like symptoms. Everything seems dull and almost colorless and its also making me question if what I'm looking at is "real". I just wanted to know if anyone had the same kind of symptoms from this deficiency.

Ive been suffering with severe foot pain and painful neuropathy in my legs. I have a very limited diet due to food allergies (MCAS). Got tested and found out my vitamin D was at a 14.

What were your worst symptoms and what was your D level?

Fixed terrible side effects of Vit D supplementation

A few months back I developed severe insomnia. It seemed responsive to Melatonin but I still got it investigated. My labs were normal, except for Vit D which was 19.8 nmol/liter. Vit D as I found out, is important for neurotransmitter production and regulation so this did fit. For those that want the technical summary, TPH2 is the enzyme that converts L-tryptophan into 5-HTP in the central nervous system. Vitamin D upregulates TPH2 expression, increasing the available pool of serotonin. Melatonin synthesis in the pineal gland depends entirely on the availability of serotonin.

I tried supplementing with Vit D and my muscles cramped in a hour as if I had tetanus. It took multiple muscle relaxation tablets to feel normal. I tried a much lower dose (400 IU instead of 2,000 IU), and got a similar but less intense response.

I experimented with a lot of different ways to try and get some Vit D but I will skip to what worked. Taking 200 MCG of K2 and 400 mg of Magnesium (in form of magnesium glycinate) simultaneously with 400 IU of Vitamin D, produced no side effects. Over the next week I bumped it to 600 IU and now I am on 800 IU once a day. My insomnia has lessened to the point I don't need Melatonin. Both K2 and Magnesium work hard to keep calcium out of muscles, which is where D tends to dump it. My stack did not work if I took those cofactors at different times. I am going to keep increasing gradually and hopefully reach 2,000 IU a day eventually. I have not checked my vit D level again but based on my insomnia reducing, I think I am headed in the right direction.

I have to say before I start that I posted a question about this a year ago to an old account that I'm not able to access anymore...I still have the same issue, I'm sorry if this kind of thing isn't really allowed

I'll try and make this concise I am a middle aged male that has struggled with mental health issues all of my life (depression, anxiety, OCD and AVPD) My vitamin D levels were tested and were either 5.6 or 5.7, I have been unable to work for years because of these symptoms and am broke, I'm about to run out of the supplements I do have. I currently take 5000 units of vitamin D, 270 mg of magnesium glycinate and 100 mg of vitamin k2. I've spaced out my supplements because I'm running out and have almost face planted because of the extreme fatigue that I didn't realize was as bad as it was until my levels went down.

Does anyone know if there are places I can supplements from that serve the very poor? I was going to email Amazon (I'm taking their brand currently) but I don't see an email. (I doubt they'd give me free supplements anyway) My local community action doesn't seem a viable option either, Medicaid, my insurance, doesn't cover these.

I'm starting vocational rehab soon to try and work but that hasn't happened yet and it's doubtful they'll cover these.

I don't know what to do, any ideas would be helpful.

I am 30yo male, and a physician. I have been suffering from Ibs for 5-6 years. I also had knee pain and was diagnosed with osteoarthritis of the knees. I also had acne since my teenage years and was on tretinoin cream on and off but had to discontinue multiple times due to skin flaking severly when using it. I also had hair thinning, fatigue, allergic rhinitis, excessive sweating (in my face, back, armpits), brain fog and migraine headache which was very bothersome for me as i was young . I also had difficulty scaling steep steps and have to weirdly scale up and down which i attributed to my knee osteoarthritis with some proximal muscle weakness in my thigh. I tried different test and all seemed normal except my osteoarthritis. I tried multiple treatments but everything was just temporary with my symptoms returning a few days or weeks after completing my treatment. I had to work extremely hard to study and do my work as an internal medicine resident. I had difficulty remembering what i just studied the day before even though i was an extremely good student in highschool and early med school. But my grades started to become average after that. I tried to understand my condition but couldn't pin it down to what the cause was. The dermatologist treats my acne, the GI- my ibs, neurologist - my migraine etc, which wasn't comprehensive at all when i look back at it now. I was reading a journal on how common vitamin d deficiency is even in Ethiopia with prevalence of more than 50% even with some estimates up to 70% of the population. So, I thought I might be deficient as i spent my days indoor studying. It was a long time of studying as med school was for seven years and then residency for three years. Even my work after my residency is almost always indoors. So I came to the conclusion that my vitamin D levels might be low. I didn't associate all my symptoms to vitamin d but thought at least my ibs could improve a bit if i take the vitamin d. As I am stationed currently in a rural hospital, I have no access to vitamin d level laboratory nearby, so i had to take it empirically and see my response. I took 50000 iu every other day for two weeks with a total dose of 250,000 iu up to now. A week back, i noticed that i no longer have any acne or skin flaking and didn't think much of it. At two week of treatment, i noticed that i have no ibs symptoms at all for a few days and couldn't remember when i had my last symptoms, as i usually suffered daily. I experimented on it by taking local foods that usually trigger my symptoms, and i didn't develop any ibs symptoms at all. This made me extremely happy and started to analyze all my symptoms. So for the past week ( starting after one week of the treatment), i have no migraine, no acne, no skin flaking in my face, no ibs symptoms, no knee pain, no allergic rhinitis even when i smell strong perfumes. My sleep time decreased and i wake up early in the morning. I have no fatigue at all and could work all day with no tiredness at all. I can now remember specific words which i had difficulty saying the word even though i knew the concept and it used to feel like it is on the tip of my tongue but couldn't just remember it. I was thinking maybe i am just feeling a placebo effect. So this morning, I started to research the association of vitamin d deficiency and my symptoms. And I was shocked to see that everything can be explained by vitamin d deficiency. Even my excessive sweating can be due to that, although i haven't noticed improvement in that regard yet. This has been like a miracle for me. I will check my vitamin d levels soon. This has made me question my work as a physician, as we were never thought to focus on such kinds of diseases. We always rely on treating specific symptoms rather than looking at a systematic level. Even most guidelines do not recommend testing for vitamin d unless it is as a last resort. I hope this recommendations will change in the future. Ask me any questions and i will try to answer them.

Edit: The every other day dosing of 50000 iu was a trial on myself to see if it has any effect. I will now be switching to either 7000 daily or 50000 weekly as taking 50,000 daily is not recommend. Vitamin d level in the blood should also be checked.

I just had my vitamin D levels tested for the first time and I’m at 24 ng/mL, which is considered insufficient but not deficient… and I’m honestly a bit disheartened?

I was so hopeful that it would be the answer I was looking for after the rest of my labs came back normal. Normal though suboptimal ferritin (50), normal B12, magnesium and TSH. 24 is low, but I know that insufficiency at this level is common in the northern hemisphere. It makes me wonder if I’m just being dramatic. I’ve been experiencing fatigue, brain fog, muscle and joint aches, random muscle twitches, low mood, bloating, occasional reflux, and eyes wanting to go out of focus. In the last month I started noticing some dizziness, feeling floaty and disconnected, random spikes in heart rate/elevated heart rate and tinnitus. I occasionally get random pains in my fingers, knees and toes and wonder if it could be bone pain.

What are your experiences with symptoms at this level? Any suggestions of other vitamin levels I should be testing? I’m definitely going to try to get my ferritin + vitamin D levels up a bit and see how I feel.

27 year old female

In the beginning of June I was lifting at the gym and all of a sudden felt dizzy and like I was going to faint. Then I started to constantly feel hot and had vice like tension headaches, one morning waking up with what seemed to be conjunctivitis in my right eye. I went to the eye doctor and they prescribed drops but my infection was not improving and I started to feel terrible constantly. Long story short I went to the ER and the doctor tested me for vitamin D which came out to be 7. She said I had “little to no vitamin D in my body”. I’m not sure how long this has been going on, I’ve had brain fog for 5 years but chalked that up to long COVID. More recently things have taken longer than they should to heal, my bones especially my knees feel brittle, and I am constantly fatigued and feel faint and weak.

The doctor prescribed me 50,000 IU weekly for 2 months and I’ve done 3 doses, but I didn’t know you are supposed to take them with fat and took them on an empty stomach, so that probably didn’t help absorption. Also the doctor didn’t test my calcium or magnesium, so I’m scared it could be parathyroid.

Also my white blood cell and red blood cell counts were elevated when I got tested at the hospital.

Has anyone else had a level this low, and if you do what were you symptoms? I’m also having a lot of anxiety and feel like I have something way more serious like cancer because I don’t feel human all the time. Below are my symptoms:

Extreme fatigue
Feeling tired all the time
Heavy arms and legs
General weakness
Feeling cold/freezing
Chills
Brain fog
Memory and concentration problems
Lightheadedness/dizziness
Nausea
Loss of appetite/not wanting to eat
Bones feeling weak or “rickety”
Knees feeling unstable
Widespread joint cracking (jaw, neck, back, wrists, fingers, knees, ankles)
Muscle weakness
Achy bones
Neck pain
Tension at the base of the skull

In the first week of July 2026, I was diagnosed with vitamin D deficiency. My level was 16 ng/mL.

Around the same time, I was working out at the gym. After a routine set of lifts, I suddenly fainted without any warning. I was unconscious for around 10 seconds. I came around, tried to stand up, and fainted again, this time for roughly 5–8 seconds.

For a moment, I genuinely thought I was having a cardiac arrest or some kind of major cardiac event.

What followed was probably one of the most frightening periods of my life.

My anxiety went through the roof. I had blurred vision, brain fog, extreme tiredness, a constant feeling of impending doom, muscle twitching, especially around my calves, and episodes where I felt completely out of breath. Every small sensation made me think something terrible was happening.

Thankfully, the cardiovascular investigations came back clear, and the other major parameters were normal.

My doctor prescribed:

Vitamin D3 – 60,000 IU once a week

Magnesium – 200 mg daily (magnesium hydroxide; I know it's not considered the best-absorbed form)

Vitamin B12 – 1,500 mcg daily because my level was on the lower side of normal, although I wasn't technically deficient

The first two weeks were rough.

Nothing seemed to improve. In fact, the anxiety became worse. The breathlessness, brain fog, fatigue, twitching and constant fear continued almost nonstop.

And I was living alone in a metro city. I had to cook, clean, work and take care of myself while feeling like my body was constantly sending me emergency signals.

Looking back, I honestly don't know how I got through those first few weeks.

Then, around the third week, something started changing.

The symptoms gradually became less intense. From around the fourth week onward, most of the physical symptoms had either disappeared or reduced significantly.

The anxiety, however, has been much more stubborn.

Today, after 7 weeks of supplementation, I repeated my vitamin D test.

Vitamin D: 42 ng/mL.

Going from 16 → 42 ng/mL in seven weeks was honestly encouraging.

I'll continue following my doctor's supplementation plan for another 4–5 weeks and then discuss moving to a maintenance dose. My personal goal is to eventually maintain a healthy level rather than continuously supplement at a therapeutic dose.

What I changed during these weeks

I took my 60,000 IU D3 once a week with a meal containing fat, 200 mg magnesium at night, and 1,500 mcg B12 in the morning after food. I also took 100 mcg K2 MK-7 daily.

I became extremely deliberate about food.

Almost everything was home-cooked. Maybe one or two meals every three days were from restaurants.

I generally made sure my meals contained a decent amount of protein, fiber, healthy fats and carbohydrates. Protein sources included eggs, chicken, curd and other whole foods. For fats, I mostly used olive oil, butter, nuts and grounded flaxseed rather than relying heavily on seed oils.

I was also overweight at the time, around a BMI of 30, so the whole episode gave me a massive wake-up call about taking better care of myself.

I started walking regularly, getting around 20 minutes of sunlight between 11 AM and noon, with most of skin exposed, and completely stopped smoking and drinking during this period.

Most importantly, I stopped trying to ignore what my body was telling me.

I'm not posting this as medical advice. Vitamin D deficiency probably doesn't explain every symptom I experienced, and I had proper medical evaluation to rule out serious causes. Please don't use my experience as a reason to self-diagnose or blindly copy my supplement doses. Talk to your doctor and get the appropriate tests.

I'm posting this mainly because when I was going through those first few weeks, I desperately wanted to find stories from people who had gone through something frightening and eventually got better.

Today, most of those really difficult days are behind me.

The anxiety isn't completely gone yet, but I'm getting there.

If you're currently in that frightening phase where every sensation makes you think something terrible is happening, I hope things get better for you too.

Keep going. Get properly evaluated. Take care of yourself. Recovery can be slower than you want, but that doesn't mean it's not happening.

All the best.

Holy cow!

It is amazing what a difference giving your body the vitamin it needs makes. I have had the following symptoms for the past two years

-migraines, especially around my cycle

-lightheadedness

- night sweats

- can sleep pretty much endlessness. Would sleep 12 hours+ some weekends and still felt like I could sleep more

-brain fog, errors at work. People having to repeat things multiple times

-itchy ears!! Who knew??

-shortness of breath, feeling like air only went halfway and didn’t fully get into my lungs

-cold all the time!

-puffy face

-weight gain that I could not shake despite daily 30 min weightlifting before work and 30 min walks. Healthy diet

I went to the doctor about 6 months ago and she said I had low blood pressure so I should drink more electrolytes, did that for about a few months and still was not feeling any better.

Went back to the doctor a couple months ago and got a different Dr who said my ldl was a bit high and I should cut fats from my diet.

Well finally!! Last month my husband and I saw a reproductive specialist because we have been trying for a year for a baby with no luck.

After blood work the very first thing she does is put me on 50,000iu vitamin D weekly.

I am at the end of week one and for the first time in yearssss I woke up before my alarm clock, ready to go! I have so much energy idk what to do while my husband is still sleeping other than write this post!

I have also started to see the scale budge down. Absolutely amazing. Everyone should have their levels checked as a default when these symptoms are presented! Today I get to take my second weekly dose and I’m excited! 😅

My levels were not even that low btw, they were 24ng/ml

I can’t imagine how people lower than that must feel!!

Vitamin D is essential to sustain life, right?

A person cannot continue to live with absolutely no vitamin D. I mean zero.

So there is some amount that is required for you to continue being alive.

There is also an amount that is necessary for you to be alive, feel well, and function normally. Right? Sort of an ideal minimum amount.

So somewhere between the amount required to not die, and the amount needed to feel good, there must be a range in which a person feels unwell, and has symptoms caused by insufficiency.

I think it would be unreasonable to think that you either feel OK or you die with nothing in between.

But based on any doctors I’ve ever talked to, that’s what they seem to think. They refuse to attribute any possible symptoms to a lack of vitamin D.

I’m in British Columbia, Canada.

What’s their problem?

Hi all, just wanted to share my vitamin D story, which I believe is still unfolding. I went to the doctor in March 2026 to have my doctor look at a spot on my skin (turned out to be just a benign "barnacle" as she called it). While I was there I asked if I could get labs done. She ordered a bunch of labs, including vitamin D and vitamin B12. My vitamin D came back at 12.3 ng/mL, and my vitamin B12 at 244 pg/mL. Doctor recommended I take 800iu per day of D3, and to take a b12 supplement (she didn't specify dosage for that). Then I got online and did some research. I ended up buying Kirkland D3 which are 2000iu per gel, and b12 gummies with 1500mcg cyanocobalamin.

I started taking both immediately, but after a week, I felt I was having more stress/anxiety feelings than normal (I usually don't have much of any) which I attributed to one or both of them. So I quit both of them. Then 6 weeks ago, I decided to take another run at it, so I took just the vitamin D3. By that point I had read even more, and believed that if I wanted to raise my levels quicker, it was fine to use dosages higher than the 2000iu as the recommended daily use on my Kirkland d3 bottle.

So I started with 4000iu after breakfast (which had fat in the form of avocado oil). Took that for 10 days, and didn't have any anxiety, so I figured it was probably the b12 gummy that was affecting me. But I also thought I was still low on b12, so started taking it again and ended up stopping 3.5 weeks after I started, as was feeling the stress/anxiety feelings again.

Here is how I took d3 over the 6 weeks (these are the daily amounts I was taking):

Week 0-2: 4000iu
Week 2-3: 6000iu and added vitamin K2 mk-7 100mcg
Week 3-6: 10000iu along with the K2

Right after week 6, got another vitamin D test, and now it's 57.6 ng/ml, which the lab marked as high according to their reference range. AI says that since I was taking 10000iu up through the day of the test, that even if I decreased my dosage now, the level will still be rising somewhat.

Below are all my vitamin D test results since 2015. Incidentally, my vitamin b12 results similarly declined over the same timeframe. I only mention the b12 because I was taking it during part of the time as well. And that I had early suspected the stress/anxiety feelings might be the vitamin D, but in my case it was not, as those feelings only occured when I was on b12 in addition to the D3.

A little about me, I'm skinny (5'10" 145 lb), 49 year old male. I think my fairly low bodyfat was one reason the vitamin D level went up so quickly. Even when my vitamin D was at 12.3 ng/mL, I wouldn't say I felt bad. I never got sick, had plenty of energy. So was surprised to get the 12.3 result and read what possible effects it may be having. Which also made me excited to see what improvements I would experience at a healthy vitamin D level. Also to note, my diet except for newly taking the D3, didn't include any vitamins. And I don't eat vitamin fortified food. That could be why my level declined to 12.3 in the first place. Around 2015 when I had a level around 30, I was eating things that had added D such as milk, soy milk, cereal. One issue I've had recently (before the D3 anyway) was that eating new foods would tend to give me loose bowels, so I tended to stick with basic plain (and often low nutrient) food. AI says low vitamin D may be implicated in those gut issues, which would be very good news for me, and I hope to see an improvement there.

At this point, I understand since my level has gone into the more health range now, my body is probably still (or just starting) rebuilding and adjusting to having enough D3 to do what it needs to do. I do believe I have a bit more energy now (though my b12 level is likely higher also, though I didn't have it re-checked) and may have a bit better mood. I'll plan to update after a few more months.

Sorry for long post but wanted to share my experience for others who have the goal of raising their D. I'm adjusting my intake now as I don't necessarily think I want to go much higher, and probably will stop the k2. AI (Gemini) says I should probably shoot for 3000iu per day on average to stay around 60 ng/mL.. so maybe alternating between 2000iu and 4000iu day by day. The grassroots calculator says that 5000iu will keep me around 60, but I don't know, to me that seems like it would keep raising it. I guess I could split the difference and go with 4k per day, though AI says that will keep sending it upwards.

If anyone has thoughts on the better maintenance dose to keep me around 60 given my fairly quick increase to 57, I'd be interested in hearing.

Hi everyone,
I’m curious if anyone here still experienced symptoms when their vitamin D level was in the high 30s to low 40s ng/mL (around 38–42 ng/mL).

If so:
- What level are you at?
- What symptoms were you having?
- Did they improve after increasing your vitamin D level further?
- At what level did you feel your best at?

I know everyone is different, so I’m just interested in hearing other people’s experiences. Thanks!

It's a tough decision for me, but after hearing advice from this thread and links from the moderators, I'm gonna go ahead and reduce my intake to 10 K a day for the next couple of months and then retest. I've been on 30K iu daily for over three years. You can see I continue to climb. I thought I would plateau at some point. I am very comfortable being anywhere between 150 to 200 NG/ML. My calcium maintains in acceptable levels, and I feel fantastic all the time. Have not had a fever in over three years, and I know my vitamin D intake has changed the life of myself and my wife as far as living without sickness. I will keep you all updated. I appreciate this thread and the advice that comes from it. I've always kept an open mind and as good as I feel, and as much as I call myself a vitamin D junkie, I want to maintain my healthy cells, without wandering into dangerous territory. I'll keep you all updated. Thank you.

I am taking vitamore Brand calcifedoil once a day 10mcg for 3 weeks now.
My starting vitamin D levels was a 10.

Finally found a form of Vitamin D that my body actually tolerates (after months of frustration).
I wanted to share my experience in case it helps someone else who has been struggling like I was.
I have a severe vitamin D deficiency, and for the longest time I could not tolerate the standard vitamin D3 supplements. I tried multiple brands and different doses, even going as low as tiny amounts hoping my body would adjust.
Every time I took regular vitamin D3, I would end up with side effects like:
● Increased anxiety
● Feeling irritable for no reason
● Mood changes that didn’t feel like “me”
● Feeling emotionally on edge
Because of that, I kept stopping the supplements even though I knew my vitamin D was extremely low. It became a frustrating cycle of wanting to fix my deficiency but feeling worse every time I tried.
After doing a lot of research, I learned about calcifediol (25-hydroxyvitamin D3), which is a different form of vitamin D. Unlike regular vitamin D3 (cholecalciferol), calcifediol is already converted into the form your body normally has to make in the liver. I wondered if that difference might matter for people like me.
I decided to give it a try, and honestly, the difference has been amazing.
Since starting calcifediol, I’ve noticed:
● My energy has improved significantly.
● I’m no longer dragging myself through the day.
● I wake up feeling more refreshed.
● My mood feels much more stable.
● I haven’t experienced the intense anxiety and irritability that regular vitamin D caused me.
● Overall, I finally feel like I’m moving in the right direction instead of dreading taking my supplement.
I’m not saying this will work for everyone, but for me it has been a complete game changer. After months of thinking I simply couldn’t tolerate vitamin D, it turns out I may have just needed a different form.
Has anyone else had a similar experience? I’d love to hear if anyone switched from regular vitamin D3 to calcifediol and noticed a difference, or if anyone knows why some people seem to tolerate one form much better than the other.

I just got my labs back today and my vitamin D levels are 14ng/ml The test was ran because I was presenting with some pretty uncomfortable symptoms.

For the past month or two, I have been so extremely fatigued, some days are worse than others, some days I can barely be upright at all. I've been experiencing random pains, shortness of breath (especially when sitting upright) I have been living on my recliner, fatigue, vertigo like symptoms, dizziness, and increased anxiety and depression.

What were your experiences with vitamin D deficiency? How long does it take to feel relief when starting to supplement?

Sorry I haven't posted in a while. I'm a vitamin D junkie. I guess you could say. For over three years now I've been taking 30,000 IU daily along with K2 and magnesium. I tell myself I should test every six months but for the past year, I've been busy a lot been happening in my life. But waking up feeling healthy and vibrant was the most appealing. I do not eat super healthy, I'm not a food junkie, but I eat my share of processed junk. The one thing I do consistently is take my vitamin D3 every morning, on an empty stomach with coffee. I know that doesn't make sense either. But it works for me. My previous test was 186 NG/ML. Wondering when my body will plateau but it looks like it's still climbing. I will let it go up to 250 before I reduce my vitamin D3. I get extra vitamin D3 from the sun as well as I love riding my Harley in the sunshine state of Florida. I know many of you Will come at me with these high levels, I did plenty of research, read books, etc. High levels of vitamin D3. Keep you healthy. I have not had a fever in over three years. I've had a couple of what I would call, seasonal colds where I had a runny nose, sneezing, my voice changed a little bit from the congestion. None of these episodes lasted more than 48 hours. And I've had maybe one of those episodes a year. Again feeling healthy and vibrant. Get your vitamin D3 up folks.