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Because the benzyl alcohol preservative prevents bacterial growth in the vial between doses

doi: 10.2174/138161210790945977

Vitamin B deficiency is incredibly common, especially for vegans and vegetarians

That decision sparked a firestorm in the biohacking and integrative medicine communities

showed that the melanocortin-derived tripeptide KPV produced significant anti-inflammatory effects in DSS colitis and CD45RBhi transfer colitis models two of the most commonly used and accepted IBD research paradigms.1 Critically, the anti-inflammatory effect persisted even in animals with a nonfunctional MC1R receptor, confirming that KPV's action does not depend on melanocortin signaling

Peptides like Ipamorelin may facilitate this effect naturally. OSullivan et al., Sports Medicine Open 3