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Use the stronger active where your skin can handle it, the gentler active where you want visible support without friction, and peptides where you want consistency

A key ingredient is L-cysteine amino acid (240 g) acting together with Vit C (1000 mg) as a coenzyme

Start slowly, use an appropriate concentration, choose a delivery vehicle that works with your skin barrier rather than against it, and be thoughtful about how you layer GHK-Cu with pH-sensitive actives like vitamin C and cell-turnover accelerators like retinol

Neurogan Quality You Can Feel Confident In: Each bottle is produced by Neurogan in a GMP-certified facility and verified through third-party testing for purity

Innovative Chemistry

They work through different mechanisms