I thought I read where your body makes some but maybe I'm wrong but i don't take any vitamins except B12 but having intestinal issues might have autoimmune issue with the colon or small intestines so maybe I'm not absorbing the B6 and that's why it's building up in my system having all kinds of sharp nerve like pains all over the midsection shoulders hips arms legs they can't figure it out I'm a autoimmune poster child then had cancer cells in polyp removed in December so who knows what i have.