Glycolic acid for skin: benefits, side effects and pregnancy

What glycolic acid is

Glycolic acid is the most common alpha-hydroxy acid (AHA) used in peels, often called a fruit peel.¹ AHAs act as exfoliants, particularly at high concentrations, according to the EU’s former cosmetics safety committee.² Depth depends on the concentration, the number of coats and how long it stays on, so the same acid can be a very superficial peel or a medium-depth one.¹

What it does for skin

A 2013 review of glycolic acid peels covers acne, acne scars, melasma, post-inflammatory hyperpigmentation, photoageing and oily skin. It describes the peels as very safe in Fitzpatrick skin types I to IV, and stresses patient selection, preparing the skin before the peel and neutralising on time.¹

One study is from India. Twenty-five women with melasma used a sunscreen and 10% glycolic acid lotion at night for two weeks, then had a 50% glycolic acid peel once a month for three months. Melasma scores improved in 91% of the women, with no significant side effects reported.³ That was a small study without a comparison group.

These are clinic peels. Home products are much weaker, and the studies above do not show what they do.

Sun sensitivity, and what to do about it

This is the main thing to know. In a study of 14 people, 10% glycolic acid applied for 3.5 weeks made skin more sensitive to simulated sunlight, with more redness, more DNA damage and more sunburn cells than untreated skin. Salicylic acid at 2% did not.⁴

The EU’s former cosmetics safety committee reached the same view. Reviewing industry data in 2004, it concluded that AHA application does increase UV damage to the skin, and kept its earlier precautionary advice: warnings to avoid contact with the eyes, and to avoid or protect against UV while using AHA products.²

So sunscreen is part of using glycolic acid, not an optional extra. The Indian melasma study required it throughout.³

Using glycolic acid with other products

We did not find a source saying glycolic acid must be kept apart from another active. What exists is mostly small studies of finished products, or treatments compared rather than combined.

Those studies do not show what happens when you layer two products you bought separately, so read each row as what has been tried, not as proof of a good match.

Glycolic acid in pregnancy and breastfeeding

No pregnancy-specific evidence is not the same as safe, or as unsafe.

That gap is normal for cosmetics. A 2026 review of cosmetic dermatology in pregnancy and lactation says high-quality safety data and formal guidelines remain limited, and that during pregnancy elective cosmetic interventions are deferred.⁷ Chemical peels are among the treatments it covers.

Ask your doctor or midwife about the specific product you use.

What strength regulators suggest, and what that means in India

The figure in Snifff’s summary comes from the EU’s former cosmetics safety committee (SCCNFP). It said more information was needed for a full safety assessment, and on the precautionary principle suggested glycolic acid could be used safely up to 4% at pH 3.8 or higher. It also suggested lactic acid up to 2.5% at pH 5.0 or higher.²

That is guidance rather than a binding limit, which is why Snifff’s summary says neither region sets a cap. We have not checked whether a newer EU opinion has replaced the 2004 paper. The strength on a home product matters, and so does the pH, because both change how strongly the acid acts.²

What you will see on the label

Glycolic acid is usually listed as Glycolic Acid, and sold as an “AHA”. Percentages are often given on the bottle. As above, the pH matters as much as the number.

Snifff shows glycolic acid as Low risk. For the rest of the formula, see what the score means and how to read the list.

As Snifff shows it

Glycolic Acid

Low risk

Pregnancy and nursing

We found no pregnancy- or lactation-specific evidence for this ingredient.

Regulatory gap

Neither region sets a binding cap. EU guidance recommends up to 4% glycolic acid for home use at pH 3.8 or above; India has no equivalent guidance.

Wording as it appears in the extension, which can change between releases.