However, as research continued, experts found that GHK could modulate a number of different cells besides those in the liver.4 GHK is naturally found in human saliva, plasma, and urine, but its standard levels are reduced by over half once you reach age 60
Understanding how collagen production declines and taking steps to protect and support collagen, such as using sunscreen, eating a nutrient-rich diet, and incorporating collagen-boosting skincare ingredients, can help us slow the aging process and maintain healthier, more youthful-looking skin
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Evidence gaps No published human randomized trial has evaluated injectable GHK-Cu for cosmetic, hair, or wound endpoints
This is particularly valuable for men over 40 who experience natural muscle loss due to declining hormone levels