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The main difference between AHAs (Alpha Hydroxy Acids) and BHAs (Beta Hydroxy Acids) lies in how they work on your skin and what skin types or concerns they target:
🧪 AHAs (Alpha Hydroxy Acids):
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Water-soluble – they work on the surface of the skin.
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Help exfoliate dead skin cells, improve skin texture, and boost radiance.
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Best for dry, dull, or aging skin.
Common AHAs:
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Glycolic acid (strongest, from sugar cane)
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Lactic acid (gentler, from milk)
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Mandelic acid (very gentle, from almonds)
Key Benefits:
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Brightens skin tone
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Improves fine lines and uneven texture
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Boosts hydration (some AHAs like lactic acid are humectants)
🧪 BHAs (Beta Hydroxy Acids):
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Oil-soluble – they penetrate deep into pores to clear out excess oil and debris.
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Best for oily, acne-prone, or congested skin.
Main BHA:
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Salicylic acid
Key Benefits:
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Unclogs pores and reduces breakouts
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Reduces blackheads and whiteheads
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Calms inflammation
🧴 Summary:
| Feature | AHAs | BHAs |
|---|---|---|
| Solubility | Water-based | Oil-based |
| Works on | Skin surface | Deep in pores |
| Best for | Dry, dull, sun-damaged skin | Oily, acne-prone skin |
| Common acids | Glycolic, Lactic, Mandelic | Salicylic acid |
| Irritation level | Can cause tingling or redness | Generally well-tolerated |
⚠️ Pro Tips:
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Always follow acids with SPF during the day.
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You can combine AHA and BHA, but introduce slowly and monitor for irritation.