ahk cu hair serum AHK-CU + GHK-CU Pro 4800mg Cu supports hair growth by improving blood flow to the follicle AHK-Cu hair serum (DIY) :

It has been tested in six clinical trials involving around 900 test subjects and has been determined by an appropriately qualified GRAS panel of experts to be Generally Recognized As Safe (GRAS) under conditions of intended uses of AOD9604 in foods [1]

Use as directed in DIY formulations only

[DOI] [PMC free article] [PubMed] [Google Scholar] 2.Shanina E, Liao B, Smith RG

Some conditions like autoimmune thyroid disease, surgical gland removal, or advanced ovarian failure may limit how far levels normalize, but symptom relief is still often significant

Too much signal and the doseresponse curve flattens - you spend more money and expose yourself to more side effects for no extra benefit