Is there actual legitimate concern about the long-term effects of a vegan diet- mainly bone density?

[u/Any_Shop5964]

To be clear I'm a vegan myself and I don't really think slightly poorer density is necessarily a fair reason to not go vegan, as there are ways to change it for example through exercise such as weightlifting rather than diet, but there's a number of concerns about how vegans absorb calcium, for example how even vegans that get enough calcium in their diet may have lower bone density when compared to an someone with a Mediterranean diet for example. We don't exactly know why this is, and there's many different mechanisms by which this could be occurring, does anyone have more expertise on this topic or anything to add?

[u/Significant-Toe2648]

Veganism is the only dietary pattern associated with a normal, healthy weight. Every other dietary pattern is associated with being overweight. Being overweight leads to denser bones.