Mechanism, Depth, Biology Here is the molecule, the receptor biology, and the gene-expression data in one place, as primary-sourced as we can make it without turning the section into a review article
N-Acetyl Cysteine (NAC) A powerful precursor that encourages natural glutathione synthesis inside your body
The copper chelation appears to facilitate cellular uptake through copper transport proteins expressed in keratinocytes and fibroblasts
Normally, glutathione is produced by the body as a sulphur-containing tripeptide from the amino acids glutamic acid, glycine and cysteine
Wink DA, Nims RW, Darbyshire JF, Christodoulou D, Hanbauer I, et al
First 2 weeks: cellular preparation (no visible changes) What's happening (invisible): GHK-Cu binding to receptors Gene expression changes beginning Fibroblast activation Collagen synthesis machinery ramping up Anti-inflammatory processes starting Cellular repair initiating What you won't see yet: No visible skin improvements No wrinkle reduction No firmness increase No texture changes Essentially looks the same Why the lag: Collagen takes weeks to accumulate Skin turnover cycle is 28-40 days Structural changes require time Visible benefits need threshold amount of new collagen What to do during this phase: Continue protocol consistently Don't get discouraged Document with photos (before baseline) Trust the process Most people quit here (mistake!) Dosing during weeks 1-2: Standard protocol: 1-2mg 3-5x weekly Aggressive: 2-3mg daily Don't increase dose out of impatience Consistency matters more than dose Weeks 3-6: first subtle improvements Early visible changes (if looking closely): Slight texture improvement (smoother) Minor firmness increase (skin feels tighter) Possible glow/radiance Hydration improvement Pore size may reduce slightly Still not dramatic: Most people don't notice without comparing photos Friends/family won't comment Need good lighting to see differences Progress is gradual What's actually happening: Collagen accumulation now measurable Skin barrier function improving Hydration retention increasing Fine lines starting to soften (very subtly) Week-by-week expectations: Staying motivated: Take weekly photos (same lighting/angle) Compare to baseline Track subjective skin feel (firmness, smoothness) Don't expect miracles yet See our peptides for anti-aging category and how long do peptides take to work
