What do you know about acid molecule size? The larger the acid molecule, the gentler it is because it can't penetrate the skin as easily. The smaller the acid molecule, the more easily it penetrates, making it a 'stronger' exfoliant. We formulated turmeric illuminating solution with 3 different acids at varying molecule sizes for an overall balanced effect on the skin! 🔬2% gluconolactone (PHA): This is a very gentle exfoliant due to its large molecule size (largest of these exfoliants, approx 178 daltons) 🔬2% mandelic (AHA): This is a gentle exfoliant due to its larger molecule size (approx 152 daltons) 🔬3% glycolic (AHA): This is the strongest of the exfoliants in the blend with impressive results due to its small molecule size (approx 76 daltons)