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If you use prescription tretinoin, the simplest structure is to alternate: apply tretinoin on its own nights and use GHK-Cu on the nights in between, so skin gets recovery support without a pH or tolerance clash
Watch for warning signs : Contact your licensed provider if you notice persistent redness, swelling, bruising, warmth, pus or other signs of infection, as well as any unexpected side effects
Opt for formulations with Salicylic Acid or Niacinamide that cut excess sebum for a balanced microbiome
This can lead to elevated homocysteine and inflammation throughout the body
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