The Duo cosmetic contains GHK-Cu and Zn-thymulin. GHK-Cu is a naturally occurring copper complex found in human plasma that has been shown to strengthen existing hair by stimulating growth in areas that are lacking thickness. Zn-thymulin is a combination of zinc and a nonapeptide called Thymulin which is used for hair loss treatment. Thymulins activity has shown to extend the anagen phase of hair follicles. Thymulin levels in the body are critically dependent on the presence of zinc.
The Duo cosmetic has been shown to work synergistically to increase the lifespan of hair follicles. Duo helps reduce the hair loss that stems from a deficiency in zinc.
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