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The liver stores significant amounts of B12, providing a reserve that can last several months to years, depending on the individual's metabolic needs and the severity of prior deficiency

However, this can change

Small et al., 2018

Degradation of B12 under Experimental Conditions Degradation of B12 to inactive byproducts in multivitamins isnt likely to pose a problem for vegans with normal digestion because 1) B12 transport proteins will protect it once dissolved, 2) intrinsic factor selects for active B12 over inactive analogs, 3) only a small percentage of B12 in multivitamins is typically degraded, and 4) manufacturers now typically add overages to supplements to cover degradation over the shelf-life of a supplement in order to be compliant with requirements

Research Peptides or Unregulated Online Sources When exploring peptides like 5-Amino-1MQ, the source matters immensely for safety, efficacy, and legality

Phase 2B results for AOD9604 do not support commercial viability (obesity indication)