Alpha Hydroxy Acid (AHA)
Also known as: AHA, Glycolic Acid, Lactic Acid, Mandelic Acid, Tartaric Acid
Water-soluble exfoliant that dissolves dead skin cells to reveal smoother, brighter skin.
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Get the appWhat it does
AHAs penetrate the stratum corneum to dissolve the bonds between dead skin cells, promoting gentle chemical exfoliation. They increase cell turnover and improve skin texture, tone, and radiance. Common types include glycolic acid (smallest molecule), lactic acid (gentler), mandelic acid, and tartaric acid.
Benefits
- Improves skin texture and smoothness
- Brightens dull, uneven skin tone
- Reduces appearance of fine lines and hyperpigmentation
- Enhances product penetration when used regularly
- Promotes collagen remodeling with consistent use
Who it suits
- Dull or rough skin
- Hyperpigmentation and uneven tone
- Fine lines and aging concerns
- Acne-prone skin (when formulated appropriately)
- Normal to dry skin types
How to use
Apply to clean, dry skin 2-3 times weekly, gradually increasing frequency as skin adapts. Follow with hydrating toner, moisturizer, and broad-spectrum SPF. Avoid mixing with other active exfoliants initially.
Pairs well with
Niacinamide, Hyaluronic Acid, Moisturizers and hydrating serums, Sunscreen
Be careful pairing with
BHA/Salicylic Acid (in same application), Retinoids (when first starting both), Other strong actives at high concentrations simultaneously
Safety & cautions
AHAs increase sun sensitivity; always use SPF 30+ during the day. Start at low concentrations (5-8%) 2-3x weekly, increasing gradually. Avoid if skin is compromised, very sensitive, or using retinoids without care. Not recommended during pregnancy without medical advice.
Educational information, not medical advice. Concentration and formulation change how an ingredient behaves.