Adverse effect · Argireline

How common is safety with Argireline?

C
Grade C — weak human evidence1 RCT (n=60) · effect size: not measurable · adverse
Short answerWeak human evidence. 1 RCT (n=60): enough to be interesting, not enough to count on. Where an effect is seen it is no measurable effect, or none yet shown. No adverse effects were reported in the four-week trial, consistent with its long use as a cosmetic ingredient. Four weeks in 60 people is a weak basis for a safety claim, though a topically applied hexapeptide is a low-risk proposition.

What the studies show

No adverse effects were reported in the four-week trial, consistent with its long use as a cosmetic ingredient. Four weeks in 60 people is a weak basis for a safety claim, though a topically applied hexapeptide is a low-risk proposition.

A few small or poorly-controlled human studies. Enough to be interesting; not enough to count on. Most of what gets called “clinically proven” online lives here.

  1. 1

In context

Argireline is a synthetic hexapeptide (acetyl hexapeptide-8) modelled on the end of SNAP-25, the protein botulinum toxin cuts, and sold in serums as a topical wrinkle treatment. Its human evidence is one 60-person randomised trial over four weeks, which reported reduced periorbital roughness and a 48.9% subjective anti-wrinkle rate against 0% on placebo. The same study appears three times in the 2013 literature under different titles. It is a legal cosmetic ingredient everywhere LYO covers and is not a medicine.

Argireline is cosmetic ingredient. Legal status differs by country — see the regulation section or the jurisdiction pages.

Questions

Is Argireline proven to cause safety?
No. The human evidence is weak (1 RCT (n=60)); LYO grades it C.
What studies are behind the grade?
No adverse effects were reported in the four-week trial, consistent with its long use as a cosmetic ingredient. Four weeks in 60 people is a weak basis for a safety claim, though a topically applied hexapeptide is a low-risk proposition.
Is Argireline approved for this?
No. Argireline is cosmetic ingredient; it is not an approved medicine for any indication in the jurisdictions LYO covers.

Other outcomes for Argireline

Written and maintained by LYO Research — how pages are written and checked. Reviewed 29 October 2026. Grades count human evidence only; see how LYO grades. Not medical advice. Correct this page →