🔼: [[🛠 Supplements]] ##### Vitamin B12 40% of the human population has trouble absorbing Cyanocobalamin, a frequently used form of B12, due to a common genetic variant, [[💡 MTHFR Gene]]. More bioavailable forms: - Methylcobalamin - Hydroxocobalamin - Adenosylcobalamin It's also worth considering a B-complex that contains one of those because B vitamins work together to make our neurotransmitters. Any single B vitamin taken in isolation for too long can lower our other B vitamins.