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GHK-Cu has been shown to be more effective than most prescription retinols for reversing skin thinning, without the irritation, purging, or photosensitivity issues that come with retinol-based products
Low-purity or degraded peptide produces poor results regardless of protocol
You can find this out through testing
These approaches work well when speed matters and when there is defined endpoint for treatment
What was available freely last year may be restricted next year
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