Adenosyl/Hydroxy B12 2000 mcg by Pure Encapsulations

Hydroxy B12 is a smart pick if your Vitamin B12, Serum is low, your Methylmalonic Acid is high (a sign your cells are short on B12), or Homocysteine is elevated (an amino acid tied to B12 and folate status). Vegans, long‑term metformin users, people on acid blockers, and those after gastric bypass are the usual suspects. If methyl B12 makes you wired, this gentler form often lands better.

This formula pairs hydroxycobalamin (hydroxy B12) with adenosylcobalamin (adenosyl B12). Hydroxy B12 is a precursor your body converts to methylcobalamin and adenosylcobalamin, so it can both lower homocysteine and refill cellular stores. Adenosyl B12 is the mitochondrial form, used by an enzyme that clears odd-chain fats and certain amino acids; when it’s low, Methylmalonic Acid rises and energy production can lag.

Each capsule delivers 2,000 mcg of vitamin B12, which is a repletion-level dose. Take one capsule with a meal, once daily to start; some clinicians use twice daily for established deficiency, then step down after labs improve. Morning is best if you’re sensitive to energizing vitamins. For long-term maintenance once levels normalize, most people can use a lower daily dose or take this less often.

Skip high-dose vitamin B12 if you’ve had acne or rosacea flare-ups from B12 before, a cobalt allergy, or Leber’s hereditary optic neuropathy. Smokers should avoid chronic megadoses; observational data link very high long-term B12 and lung cancer risk in smokers. If you have true pernicious anemia, you still need medical evaluation. Pairing B12 with folate is common, but don’t self-treat unexplained anemia without labs.