Grain-free scrubs fall into two categories: enzymatic exfoliants and acid-based exfoliants (AHA/BHA).
Natural enzymes (papain, proteases, lipases…) help gently and gradually remove dead skin cells from the surface. Their action is considered the gentlest form of exfoliation, as it is non-abrasive and does not involve a significant change in skin pH.
AHAs and BHAs are acids that temporarily alter the skin’s pH to loosen dead skin cells. Their action can be more intense depending on the concentration and skin sensitivity.
Another difference: since plant enzymes are more difficult to stabilize, they are often sold in powder form to be activated with water.








