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They are involved in protein synthesis, muscle growth and hormone regulation
Factors such as initial B12 levels, underlying medical conditions, certain medications, advanced age, and injection frequency can affect the absorption and utilization of B12, possibly shortening the duration of action
P.CarapitoC.DelalandeF.Van DorsselaerA.BrugidouC
Most reconstituted peptides maintain potency for 3 to 4 weeks when stored properly, though some researchers report usable potency for up to 6 weeks
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