There arent direct clinical comparisons yet, so "better" depends on your skin goals and tolerance, but GHK-Cu is often used as an alternative to retinol
Poirier, C., van Effenterre, D., Delord, B., Johannes, L
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How long before we reassess my results
The safety and efficacy of N-acetylcysteine as an augmentation in the treatment of obsessive-compulsive disorder in adults: a systematic review and meta-analysis of randomized clinical trials
Benefits, Side Effects, Cost, Safety, and FAQs GHK-Cu Cream for Skin: Anti-Aging Benefits, Results, and Best Use Cases If youve heard about peptide therapy & want to know more about how it works & its potential benefits, weve collected what you need to know