glutathione pills FDA scientists flag concerns with peptides as RFK Jr. tries to ease access : NPR fda warning letters bpc-157 peptide

If its methylcobalamin then it needs to be stored below 4C

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Because the products are unregulated, peptide users dont truly know what theyre injecting into themselves

Hydroxocobalamin: Often used in injectable B12 formulations, hydroxocobalamin has a longer duration of action than cyanocobalamin

By dosage, the mean changes were: 500 mcg: 127% 750 mcg: 176% (single study) 1,000 mcg: 280% 1,500 mcg: 310% 2000 mcg: 260% 5,000 mcg: 62% While 1,500 mcg of vitamin B12 showed the highest average increase, the effect plateaued or declined at higher doses, suggesting a possible saturation of absorption pathways