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How much does the GHKCU concentration needs to be in a topcial cream?

eindbaas

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A guy told me 30%. I purchased some raw powder, which was quite expensive, and I want to determine the effective concentration for use on my face. I’ll be making my own serum and keeping a detailed log with photos.
 
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A guy told me 30%. I purchased some raw powder, which was quite expensive, and I want to determine the effective concentration for use on my face. I’ll be making my own serum and keeping a detailed log with photos.
Instead of a 30% blend, aiming for a starting concentration of 1% which scientific studies have found safe will both save you money and minimize the risk of harming your skin.
 

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