In addition to fatigue, a deficiency of B12 can lead to other symptoms like pale skin, headaches, depression, gastrointestinal problems, difficulty concentrating, decreased mental function, mouth and tongue pain or inflammation, and paresthesia in your hands and feet
As of April 22, 2026, it was removed from FDA Category 2, but the FDA's Pharmacy Compounding Advisory Committee will not consider it for the 503A bulks list until the July 23, 2026 meeting
But it's one tool
Chemical substances shall not be used as a drug, medicine, active substance, medical aid, cosmetic product, a substance for production of a cosmetic product neither for human consumption that is any food
It means a peptide containing 15 amino-acid residues