[PubMed] [Google Scholar] 30.Fortier M, Wang SP, Mauriege P, Semache M, Mfuma L, et al
[6] [25] At levels only slightly below normal, deficiency can result in fatigue, headaches, feeling faint, rapid breathing, pale skin, numbness or tingling, poor appetite, heartburn, poor balance, difficulty walking, poor reflexes, blurred vision, memory problems, depression, irritability, inattention, cognitive decline, dementia, and even psychosis
co-supplementation with folic acid and vitamin B 12 (500 g/day) provided an additional 7% reduction (32% decrease) in blood homocysteine concentrations (29)
Compounded medications are not FDA-approved and are prescribed only if clinically appropriate after provider review
Performance-focused users often use 4 to 8 week cycles, while wellness protocols extend 8 to 12 weeks
Only animal foods have vitamin B12 naturally