I think it’s dangerous to play around with this without blood tests. That said, I do use D3 and B12 supplements, since I always scored low when getting tested, and I do feel better now that I do.

Most effect on my health and diet has therapy. I do believe there is only so much you can do “by force” (willpower), and it’s much nicer to do it by tuning the underlying programming (eg. parts work/ifs and the like).