Glycolic Acid

INCI - Glycolic Acid.

What is it - Glycolic Acid is an AHA alpha hydroxy acid apart of powerful group of actives. Glycolic acid is used for its exfoliating properties, and ability to reduce pigmentation, fine lines and wrinkles.

pH - Formulations should be between 3.5-4.

Safety limit - Up to 10% in leave on products up to 20% in rinse off products.

Formulas used in - Serums, creams, lotions, cleansers, masks, peels, toners, exfoliants.

Formulation notes - The efficacy of glycolic acid is very dependent on the pH. For maximum bioavailability keep formulas to a pH of 3.5-4. Glycolic acid is 50% bioavailable when the formula is at a pH of 3.5, the higher the pH the less bioavailable it becomes. Using 10% glycolic acid in a formula with a pH of 6 would be less effective then using 4% glycolic acid in a formula with a pH of 3.5. If making an emulsion add during the cool down phase.

Odour - Mild acidic odour.

Form - Powder or liquid.

Heat sensitivity - Up to 50°C.

Solubility - Water soluble.

Natural / synthetic status - Naturally occurring however it is generally synthetically produced for cosmetic use.

Contraindications - Do not use in conjunction with any forms of Vitamin C or with Retinol (vitamin A) as this can cause skin irritation. Please note that topical application of AHAs do increase the risk of UV damage to the skin so always ensure you are using a broad spectrum sunscreen daily.