The absorption of vitamin B12 from your food and oral supplementation requires a well functioning stomach, pancreas, intrinsic factor, enzymes, and the small intestine
Results can vary, but many individuals notice positive effects within the first 2448 hours
However, long-term safety data is limited, and its full risk profile is not yet completely understood
Deficiency symptoms like fatigue, weakness, and decreased endurance directly impair athletic performance
B12 ampoules are only allowed to be sold by registered pharmacies in Germany, so Amazon is, so to speak , a go-between
(50 mg IM twice weekly slowed functional decline by ~43% in early-stage ALS.) Clinical safety of ultra-high-dose methylcobalamin in patients with amyotrophic lateral sclerosis: Open-label extension (long-term safety data)