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The authors reported a 55.8% reduction in facial wrinkle volume and a 32.8% reduction in wrinkle depth compared with control serum, alongside in vitro evidence that GHK-Cu increased both collagen and elastin production in human dermal fibroblasts at concentrations as low as 0.01 nM [4]

Manufacturer list prices are around $900 or more (and retail prices even higher) for about a months supply of any of the GLP-1 agonists that are widely used in the U.S

References: [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] [17] [18] [19] [20] [21]

In summary, the study demonstrates that FOXO4-DRI effectively eliminates senescent Leydig cells, improves the testicular microenvironment, and alleviates age-related testosterone secretion insufficiency, highlighting its therapeutic potential for male late-onset hypogonadism [1]