ghk cu tolerance or diminishing returns The Effect of the Human Peptide on Gene Expression Relevant to Nervous System Function and Cognitive Decline Does GHK-Cu Really Work? 40

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Collectively, it may be hypothesized that obesity induces feedback inhibition of pituitary GH secretion by increasing non-fasting serum FFA levels and the associated insulin resistance that causes compensatory intra-portal hyperinsulinemia and IGFBP-1 suppression, with the net result being low GH and normal IGF-I levels

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