"Research-grade peptides are going to have junk in them," said Paul Knoepfler, a cellular biologist at the University of California Davis
Trial evidence: Tesamorelin 2mg SC daily sustained GH/IGF-1 elevation, 15-18% visceral fat reduction over 6 months (Falutz, NEJM 2007, PMID 17699044) Ipamorelin 200-300 mcg peak GH 5-10x baseline within 30 minutes, no cortisol/prolactin bump (Raun, EJE 1998, PMID 9539826) GHRH + GHRP synergy 2-3x greater amplitude than either alone (Bowers, JCEM 1991, PMID 2004615) Community protocols extend this evidence base with cycling patterns that weren't studied in the original trials the 5-on/2-off rhythm and 8-week cycles are empirical community consensus, not clinically validated
Because regulatory status can change between when this article is written and when you read it: always verify the current FDA classification of any peptide with a licensed, qualified healthcare provider before considering any treatment
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Other studies have connected low zinc levels with low IGF-1 in both rodents and humans, even when calorie intake is adequate (5, 48, 49)
