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At 500 mcg per dose, you get 30 doses from a single vial, which is outstanding economy
The investigators reported improvements in skin density, dermal thickness, laxity (firmness), and reduction of fine lines in the GHK-Cu arm compared with vehicle control over the 12-week treatment period [3]
Remember that natural or not a drug (as peptides are sometimes marketed) does not equal safe many powerful hormones and growth factors are natural and can also fuel diseases like cancer if misused
doi:10.3945/ajcn.111.020230
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