Alpha-hydroxy acids (AHAs) are water-soluble organic exfoliating acids, and they occur naturally in many foods and milk sugars. Among the various types of alpha-hydroxy acids, we have:
Glycolic acid: derived from sugarcane, it is known for its effectiveness in promoting cell turnover and improving skin texture.
Lactic acid: obtained through milk fermentation, it is gentle and moisturizing, ideal for sensitive skin and boosting skin hydration.
Malic acid: extracted from apples, this acid helps exfoliate skin and improve its glow.
Tartaric acid: derived from grapes, it helps exfoliate skin while improving its evenness and glow.
Citric acid: found in citrus fruits, it is used to adjust the pH of cosmetics and has antioxidant properties.
Mandelic acid: derived from bitter almonds, it is known for its antibacterial properties and helps regulate sebum production.
Pyruvic acid: a powerful exfoliant that can significantly improve skin texture and reduce imperfections like scars and dark spots.
The factors that affect the safety and effectiveness of AHA products include concentration, pH, exposure time, and the amount of free acid present.
For this reason, they should be used with caution to avoid potential adverse reactions such as swelling, burning, and itching. Our top recommendation is to avoid overusing excessively high concentrations or long exposure times.
AHAs are commonly found in products such as toners, serums, peels, and even cleansers: so be careful not to use too many skincare products that contain them. They can end up irritating your skin and being poorly tolerated.
DIFFERENCE BETWEEN ALPHA AND BETA HYDROXY ACIDS
AHAs are short-chain hydroxy acids that act on the outermost layer of the skin to stimulate cell turnover and improve skin elasticity. Thanks to their properties, AHAs are often used to treat dry, sun-damaged, or hyperpigmented skin.
BHAs, on the other hand, are long-chain hydroxy acids that act deeply, penetrating pores to remove excess sebum and dead skin cells. Thanks to the benefits they provide, BHAs (mainly salicylic acid) are used to treat oily, acne-prone, or enlarged-pore skin.
If a cosmetic product is formulated with both types of these acids, it will deliver a deeper exfoliation full of skin benefits. Always remember to follow the product's correct application instructions!