Theyve been promoted across the wellness space by everyone from Andrew Huberman and Gary Brecka to aspirational immortal Bryan Johnson, while celebrities ranging from Hailey Bieber and comedian Bert Kreischer have discussed using them
Vitamin B12 (Cobalamin) Deficiency in Elderly Patients. Canadian Medical Association Journal 171, no
Many individuals use these medications to manage metabolic health even when they arent seeking extreme weight loss
Reviews describe regenerative and protective actions, roles in skin regeneration, and modulation of multiple cellular pathways but this is largely mechanistic and preclinical work, not large human efficacy trials
Limited Long-Term Research One of the most important considerations is that long-term safety data remains limited
When taken in appropriate doses, vitamin D injections are generally well-tolerated with no side effects