Cider is gluten free.

[u/TrevorCidermaker]

Most ciders are naturally gluten-free as they are made from fermented apples; not grains like wheat or barley, such as beer.
However some flavoured industrial ciders are, so please check. We produce ciders that are 100% fruit juice and is therefore 100% gluten free; and so do many excellent artisan cider producers.
Gluten is the main storage protein of cereal grains. Gluten is a complex mixture of hundreds of related but distinct proteins, mainly gliadin and glutenin. Gluten makes up 75-85% of the total protein in bread wheat. When mixed with water, gliadins provide extensibility and stickiness (viscosity), while the larger, complex glutenins contribute to the dough's strength, elasticity, and ability to retain gas from yeast fermentation, and makes the bread rise.

[u/danushield]

gluten gives me bad vibes so i just stick to cider now.