Physical exfoliants manually scrub away dead skin cells using texture, while chemical exfoliants use acids to dissolve the bonds holding dead cells to the surface — chemical exfoliation is generally gentler and more even, which is why it's increasingly recommended over physical scrubs for most skin types.
How Physical Exfoliation Works
Scrubs, brushes, and textured tools physically remove dead skin cells through friction. The result is immediate but can be uneven and, particularly with coarse or gritty scrubs, cause micro-tears in the skin that aren't always visible but still compromise the barrier over time.
How Chemical Exfoliation Works
| Acid Type | Examples | Best For |
|---|---|---|
| AHA (Alpha Hydroxy Acid) | Glycolic, lactic acid | Surface texture, dullness, dry skin |
| BHA (Beta Hydroxy Acid) | Salicylic acid | Oily, acne-prone, congested skin (oil-soluble, penetrates pores) |
| PHA (Polyhydroxy Acid) | Gluconolactone | Sensitive skin needing a gentler option |
Pro tip: If you've never used a chemical exfoliant before, start with a PHA or a low-concentration AHA rather than jumping straight to a strong glycolic acid product. PHAs have a larger molecular size that limits how deeply they penetrate, making them a genuinely gentler starting point for sensitive skin.
How Often to Exfoliate
Most skin types do well with chemical exfoliation 2-3 times per week, not daily. Daily exfoliation, regardless of method, is one of the most common causes of a compromised skin barrier — more frequent isn't more effective, it's just more likely to cause irritation.
Signs You're Over-Exfoliating
- Persistent redness or a tight, uncomfortable feeling after cleansing
- Increased sensitivity to products that never used to bother you
- Skin that looks shiny or "glazed" rather than genuinely healthy
Watch out: Combining physical and chemical exfoliation in the same routine, or using multiple chemical exfoliants at once, compounds the effect well beyond what either alone would do. Pick one primary exfoliation method and frequency rather than layering approaches.
Frequently Asked Questions
Is chemical exfoliation better than physical scrubs?
Generally considered gentler and more even, since chemical exfoliants dissolve cell bonds rather than relying on manual friction, which can cause micro-tears with coarse scrubs.
How often should I exfoliate my face?
Most skin types do well with 2-3 times per week for chemical exfoliation — daily exfoliation is a common cause of barrier damage.
What's the gentlest exfoliating acid for sensitive skin?
PHAs (like gluconolactone) are generally considered the gentlest option due to their larger molecular size, which limits how deeply they penetrate.
Explore our face care collection to find the right exfoliant for your skin.
