Acetyl hexapeptide-8 (the "botox-like" peptide) showed promise for reducing wrinkles, improving elasticity, and boosting hydration in studies. However, there's a major catch: the molecule is too large and water-loving to easily penetrate skin, so it struggles to actually reach the nerve endings where it's supposed to work. Scientists still don't fully understand how it delivers results topically, and better delivery systems are needed to make it actually effective.

This was a literature review—researchers analyzed existing preclinical and clinical studies on acetyl hexapeptide-8 to summarize what we know about how it works, how well it penetrates skin, and what results it delivers.

Funding not disclosed in abstract