In the United States, the FDA issued guidance in 2023 indicating that BPC-157 cannot be used as an active pharmaceutical ingredient in compounded medications under Section 503A or 503B of the Federal Food, Drug and Cosmetic Act
Minimizing Methylmalonic Acid Levels A potential problem with the IOMs method for determining B12 requirements (see Institute of Medicines Recommendations above), is that a small percentage of people with neurological symptoms of B12 deficiency have normal blood parameters, including 13% of patients in one series of case studies (Lindenbaum, 1988)
Vitamin B12 deficiency is a genuine clinical concern but the right treatment depends on accurate diagnosis and individual factors
M., Adrian, S., Yenokyan, G., Scherzinger, A., Dub, M
Vegetarians and vegans : Since B12 is primarily found in animal products, individuals who follow plant-based diets may need B12 supplementation