AHA Peel vs Glycolic Peel
- 7 Key Differences You Should Know
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Across the UK
Rated 92%
on Trustpilot
Over 1 million Treatments
delivered
Award winning
Clinics Across the UK
Expert Team of
professionals
9 Clinics
Across the UK
Chemical peels have become a trusted way to refresh dull skin, reduce signs of ageing, and smooth uneven texture. Among the many options, AHA and glycolic peels stand out for their ability to deliver noticeable results without surgery or needles.
An AHA peel is a treatment that uses Alpha Hydroxy Acids to exfoliate the skin, while a glycolic peel is a specific type of AHA peel made from sugar cane.
Glycolic acid is also the most commonly used AHA in professional peels because of its strong exfoliating power and ability to penetrate deeper layers of the skin.
Though they sound similar, their differences matter when choosing a safe and effective treatment for your unique skin type.
In this article, you’ll learn exactly how AHA and glycolic peels differ, which skin concerns each one targets, and how to decide which treatment is best for you.
AHA Peel vs Glycolic Peel: 7 Key Differences You Should Know
An AHA peel uses Alpha Hydroxy Acids, natural acids derived from fruit, milk, or sugar to gently exfoliate the skin’s surface. These acids dissolve the bonds that hold dead skin cells together, revealing smoother, brighter skin underneath.
Common types of AHAs include:
- Lactic acid (from milk): hydrates and gently exfoliates
- Mandelic acid (from almonds): suitable for sensitive or acne-prone skin
- Citric acid (from citrus fruits): brightens and refines pores.
- Glycolic acid (from sugar cane): deeply exfoliates
- Malic acid (from apples): improves overall texture
AHA peels work mainly on the outermost skin layer (epidermis), helping to even tone, improve hydration, and smooth fine-texture irregularities.
What is a Glycolic Peel?
A glycolic peel is one type of AHA peel that uses glycolic acid, the smallest and most powerful molecule in the AHA family. Because of its tiny molecular size, glycolic acid penetrates deeper into the skin than other AHAs.
Derived from sugar cane, this peel is especially effective for addressing pigmentation, fine lines, and mild acne scars. It removes dead cells more efficiently and stimulates collagen production, making it ideal for thicker or more sun-damaged skin.
Key Chemical and Functional Differences
While all glycolic peels are AHA peels, not all AHA peels are glycolic. Here’s how they differ in structure and effect:
- Molecular size & penetration: Glycolic acid has the smallest molecule, allowing it to reach deeper layers for stronger results.
- Exfoliation intensity: Glycolic peels are more potent, while AHAs like lactic or mandelic acids offer a gentler exfoliation.
- Hydration: Lactic acid peels boost moisture retention, making them ideal for dry skin, whereas glycolic peels focus on resurfacing.
- Skin tolerance: Sensitive skin types often respond better to milder AHAs, while glycolic acid may cause temporary irritation if not used correctly.
Skin Concerns Best Suited for Each
AHA Peels (General):
- Dull, dry, or flaky skin
- Uneven texture or mild pigmentation
- Sensitive or reactive skin (especially with lactic or mandelic acid)
Glycolic Peels:
- Stubborn pigmentation and acne scars
- Fine lines and wrinkles
- Thick, oily, or sun-damaged skin
In short, AHAs are perfect for brightening and refining, while glycolic peels go deeper for more dramatic renewal.
Differences in Strength and Concentration
Both AHA and glycolic peels vary in strength, depending on their concentration and pH level.
- Professional AHA peels typically range from 20% to 70%, depending on the type of acid used.
- Glycolic peels often sit between 30% and 70%, delivering stronger exfoliation because of their smaller molecules.
Lower pH and higher concentrations increase the peel’s intensity and results but also the risk of irritation. This is why professional supervision is essential for high-strength glycolic treatments, ensuring the peel is applied, timed, and neutralised correctly.
Downtime and Side Effects Comparison
Both AHA and glycolic peels are considered non-invasive, but the recovery experience can differ slightly.
AHA Peels:
- May cause mild redness or light flaking for a few days
- Usually involve minimal downtime
- Ideal for regular skin maintenance
Glycolic Peels:
- Can trigger temporary stinging, peeling, or increased sensitivity
- Require careful aftercare and consistent SPF protection
- May irritate sensitive skin if used too frequently
Following your therapist’s post-treatment instructions and using sunscreen daily will protect your results and prevent pigmentation.
How Much Does Treatment Cost?
Not all peels are meant to be done at home.
- AHA exfoliants are available in low concentrations for safe, at-home maintenance. They help maintain the glow between professional treatments.
- Glycolic peels, however, should always be done professionally. Their strength and penetration require expert timing and neutralisation to prevent irritation or uneven results.
Proper aftercare, such as hydrating the skin, avoiding active ingredients for a few days, and using SPF, is essential to protect your skin barrier.
Which Peel is Better for You?
Choosing between an AHA peel and a glycolic peel depends on your skin type, condition, and goals.
- If your skin is dry, dull, or sensitive, opt for gentler AHAs like lactic or mandelic acid.
- If you have oily, ageing, or sun-damaged skin, a glycolic peel can deliver deeper resurfacing and faster results.
It’s always best to consult a skincare professional before deciding. At Colaz, your practitioner will assess your skin and recommend a peel that’s safe and effective for your needs.
Conclusion
All glycolic peels are AHA peels, but not all AHA peels are glycolic. The key difference lies in their strength and depth of action. Glycolic acid penetrates deeper, providing faster resurfacing results, while other AHAs offer a gentler, more hydrating approach for sensitive skin.
The best peel for you depends on your skin’s needs, tolerance, and desired outcome, so always seek professional advice for a safe, customised treatment plan.
Frequently Asked Questions
Most people benefit from a course of treatments every 4-6 weeks. The exact frequency depends on your skin type and the peel’s strength.
Yes, but it’s best to space them out. Avoid using strong retinols, scrubs, or other exfoliants for several days before and after your peel.
Glycolic peels can irritate very sensitive or rosacea-prone skin. In such cases, lactic or mandelic peels are safer options.
You’ll notice brighter, smoother skin after just one session, but deeper concerns like pigmentation or fine lines improve best with a series of treatments.
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