what is the difference between glutathione and collagen vs Glutathione: Works Best For Skin? Collagen Vs Glutathione

Younger users (20s-30s) with robust natural collagen synthesis often sustain GHK-Cu benefits better than older users (50s-60s) whose baseline production has declined substantially

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Heres exactly how I ranked these glutathione contenders: Week 0 : Baseline photos (consistent lighting, no filter) Weeks 1-4 : Daily use (AM/PM), tracking glow + hydration Weeks 5-8 : Dark spot measurement (ImageJ software analysis) Weeks 9-12 : Long-term fading + skin barrier health Metrics : Melanin index reduction, user satisfaction, value/ Sample Size : 5 skin types (oily, dry, combo, sensitive, mature) Controls : Identical SPF/moisturizer routine across all tests Result : Only glutathione facewashes hitting 60%+ dark spot reduction made the top 10

there's a specific order that can maximize the benefits of each