- Usual strength
- 5–10% in home products
- Use
- At night, a few times a week
- Good with
- Moisturiser, hyaluronic acid, sunscreen
- Pregnancy
- Low strengths are often allowed; ask your doctor
Glycolic acid has the smallest molecule of the AHAs, so it penetrates easily. It loosens the bonds between dead surface cells so they shed more evenly, revealing smoother skin.
Benefits
- Smoother texture and a more even glow
- Can help fade dark spots and sun damage over time
- Helps other skincare absorb more evenly
How to use glycolic acid
- Start two or three nights a week, on clean, dry skin
- Follow with moisturiser
- Use sunscreen every morning; AHAs increase sun sensitivity
- Stronger glycolic peels are medical procedures and should be done by a dermatologist
Precautions
- Can sting or cause redness, especially on sensitive or dry skin
- Avoid using on the same night as retinol when you are starting out
- Do not use on broken, sunburnt or freshly waxed skin
- Darker skin tones can develop marks from irritation, so increase strength slowly
Who is it suitable for?
Best for normal, oily and sun-damaged skin. Sensitive skin may prefer milder acids such as lactic or mandelic acid.
Patch test first. Apply a small amount behind the ear or on the inner arm once a day for a few days. If you notice redness, burning, itching or swelling, do not use the product, and see a dermatologist if the reaction does not settle.
Read more on the clinic blog: Glycolic acid article.
Common questions
What is the difference between glycolic and salicylic acid?
Glycolic acid works mainly on the skin surface, which helps texture and glow. Salicylic acid is oil-soluble and works inside pores, which helps blackheads and acne.
This guide is for general education and is not medical advice. If you are pregnant, breastfeeding, using prescription treatment or have a skin condition, ask your dermatologist before starting a new active ingredient.