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Eur J Pharmacol 2007

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Some animal studies have used intragastric (oral) administration and reported effects, which is notable because oral peptide delivery typically suffers from enzymatic degradation

By your thirties and forties, levels decrease noticeably, and by age 60 they fall to roughly 80 ng/mL. This reduction coincides with physiological changes commonly associated with aging, such as slower wound healing, thinning skin, and a general decline in tissue repair efficiency

A vial labeled research only is sold for laboratory use, has no prescription tied to it, no traceability to a patient, and no enforceable quality standard for human use