Is glycolic acid safe to use on the scalp?

Yes. The scalp is skin, so it can be exfoliated like the rest of your skin. Start with once a week and build up as needed, and avoid using it on broken or very irritated skin.

How often should I exfoliate my scalp?

One to two times a week works for most people. If your scalp gets oily or flaky quickly, you may prefer the higher end of that range.

Can I use glycolic acid on coloured or treated hair?

Apply the scrub to the scalp rather than the lengths, and rinse well. Focusing the product on the scalp helps keep it away from your mid-lengths and ends.

Will it help with an itchy scalp?

Removing buildup and flakes can help the scalp feel more comfortable. If itching is persistent or severe, speak to a professional.

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Glycolic Acid for Scalp: What It Does and How to Use It

Glycolic acid gently exfoliates the scalp to remove buildup, flakes and excess oil, leaving the skin beneath your hair cleaner, fresher and more balanced.

Author

askINKEY skincare advisor

Published

17 October, 2026

Time to read

3 minutes

Glycolic acid is an exfoliating acid that removes buildup, flakes and excess oil from the scalp, leaving the skin beneath your hair cleaner and more balanced. Your scalp is skin, so it benefits from exfoliation in the same way your face does. This guide explains how glycolic acid works on the scalp, who it suits and how to add it to your routine.

What is glycolic acid?

Glycolic acid is an alpha hydroxy acid (AHA) derived from sugar cane. It has the smallest molecule size of the AHAs, which means it works efficiently on the surface of the skin. On the scalp, it loosens the bonds between dead skin cells so they can be rinsed away, rather than building up around the hair follicle.

What does glycolic acid do for your scalp?

Think of your scalp the same way you think of your face. Over time it collects dead skin cells, excess oil, sweat and leftover product. When that buildup is not removed, it can leave the scalp feeling itchy, look flaky and appear dull at the roots.

Glycolic acid helps by:

Removing buildup from product, oil and dead skin cells
Reducing the look of flakiness and dry patches
Helping to balance excess oil at the roots
Leaving the scalp feeling fresher and more comfortable
Creating a cleaner base so hair looks and feels healthier

Who should use glycolic acid on their scalp?

A glycolic acid scalp exfoliant is a good fit if you notice:

Flakiness or dry, tight-feeling skin on the scalp
Oily roots or product buildup between washes
An itchy or uncomfortable scalp
Hair that looks dull or weighed down at the root

If your scalp is currently broken, sore or very irritated, wait until it has calmed before exfoliating.

How to use glycolic acid on your scalp

Our Glycolic Acid Exfoliating Scalp Scrub (CA$21.50) is designed to exfoliate the scalp while you cleanse. It combines glycolic acid to remove buildup with physical exfoliating particles to help lift away flakes.

How to use it:

Apply to wet hair before shampooing.
Part your hair in sections and massage the scrub directly into the scalp, not the lengths.
Massage gently for around 30 to 60 seconds.
Rinse thoroughly, then continue with your usual shampoo and conditioner.

Use it one to two times a week, depending on how much buildup you tend to get.

Glycolic acid vs salicylic acid for the scalp

Both help with scalp buildup, but they work slightly differently.

Glycolic acid is water-loving and works on the surface to remove dead skin cells and flakes. It suits scalps that feel dry, flaky or dull.
Salicylic acid is oil-loving, so it can get into the follicle to clear excess oil and congestion. It suits scalps that feel oily or congested at the roots.

If your main concern is oiliness and buildup deeper in the follicle, our Salicylic Acid Exfoliating Scalp Treatment(CA$23.00) is a leave-in option that targets oil and buildup between washes.

Frequently Asked Questions

Yes. The scalp is skin, so it can be exfoliated like the rest of your skin. Start with once a week and build up as needed, and avoid using it on broken or very irritated skin.
One to two times a week works for most people. If your scalp gets oily or flaky quickly, you may prefer the higher end of that range.
Apply the scrub to the scalp rather than the lengths, and rinse well. Focusing the product on the scalp helps keep it away from your mid-lengths and ends.
Removing buildup and flakes can help the scalp feel more comfortable. If itching is persistent or severe, speak to a professional.

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