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Among commonly consumed foods, avocado is often recognized as one of the richest natural sources of glutathione
GHK-Cu naturally occurs in human plasma, saliva, and urine, but levels drop with age
Fibroblast studies suggest it can stimulate collagen production, and gene-expression work indicates it influences the activity of a large number of human genes involved in tissue repair and antioxidant defense
When the cells reached approximately 80% confluency, cells were harvested with trypsin and seeded at a density of 2.9 10 5 cells per well in 2.5 ml of culture medium into 6 well flat-bottomed plates (Costar, Corning, USA) and incubated for 24 hr
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