After 4 weeks of twice-daily mandelic acid application, users saw measurable improvements in skin elasticity (up 25.4%) and firmness (up 23.8%). These weren't just subjective—they were measured with objective skin testing tools, and the improvements matched what people actually saw in photos.

24 people aged 42-68 applied mandelic acid to their face twice daily for 4 weeks. Researchers measured skin elasticity and firmness weekly using a device called a Cutometer that objectively measures how skin bounces back.

Funding not disclosed in abstract