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Exclusion criteria in this study were active smokers, active hormonal therapy, consumption of antioxidants in the past 4 weeks including glutathione, other dermatology diseases such as vitiligo, psoriasis, and another chronic systemic disease (diabetes mellitus, heart failure, systemic lupus, etc.)
Consistent use of sun protection helps maintain the progress you make with your supplement routine
The choice between these approaches depends on individual goals and priorities
Research-grade GHK-Cu is typically sourced with purity and identity confirmed before distribution
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