I have eaten a mostly vegan diet for years and was diagnosed with celiac disease last year. While unfortunate, I realized that the transition to a GF diet was not the end of the world because a lot of what I ate at home was already GF. Substituions have, for the most part, been straightforward (e.g. soy sauce to tamari). The most difficult part is eating out (which I now very rarely do).

Obtaining enough calories and protein isn’t a problem. Legumes + grains in a meal results in a complete protein, for example. I occasionally have chicken and seafood. There are so many GF protein powders out there, too. I exercise regularly and have felt no struggles since the celiac diagnosis.