Is lactic acid better than glycolic acid for sensitive skin?

Yes. Lactic acid has a larger molecular size than glycolic acid, meaning it penetrates more slowly and is much gentler. This makes it the preferred AHA for sensitive skin or those prone to irritation.

Can I use lactic acid every day if I have sensitive skin?

In most cases, yes. Lactic acid can be used daily when delivered in a gentle formula, as it both exfoliates and hydrates. However, it’s best to start with 2–3 times per week and increase gradually.

Can I combine AHAs like lactic or glycolic acid with retinol?

It’s possible to combine AHAs with retinol, but for sensitive skin it’s often better to alternate nights to minimise irritation. Introduce one active at a time and support your barrier with hydrating products.

August 21, 2025Skin Fundamentals

Lactic vs Glycolic Acid: Which Is Better for Sensitive Skin?

If you’ve ever explored exfoliating skincare, chances are you’ve seen AHAs (Alpha Hydroxy Acids) like Lactic Acid and Glycolic Acid topping the ingredient lists. Both are celebrated for their ability to smooth skin texture, boost radiance, and refine pores. But when it comes to sensitive skin, the choice between the two can make all the difference.

What Are AHAs?

AHAs are water-soluble acids that gently exfoliate the skin’s surface by dissolving the bonds that hold dead skin cells together. This process reveals fresher, brighter, and smoother skin beneath. The two most common AHAs in skincare are:

Glycolic Acid – derived from sugarcane, with the smallest molecule size.
Lactic Acid – derived from the fermentation of a cultured bacteria, with a slightly larger molecule size.

Glycolic Acid: Powerful but Potent

Pros:

Penetrates deeply due to its small molecular size.
Helps fade hyperpigmentation and fine lines quickly.

Cons for Sensitive Skin:

Its strength can cause stinging, redness, or dryness.
Often unsuitable for rosacea-prone or reactive complexions.
Best reserved for more resilient skin types.

Lactic Acid: The Gentle Overachiever

Pros:

Larger molecule size = slower penetration = gentler on skin.
Hydrates while exfoliating, thanks to its humectant properties.
Strengthens the skin barrier and helps reduce irritation over time.
Better tolerated by sensitive or first-time AHA users.

Cons:

Slightly less “fast-acting” than Glycolic Acid.

Which Is Better for Sensitive Skin?

If your skin is prone to dryness, redness, or irritation, Lactic Acid is the clear winner. While Glycolic Acid is incredibly effective, its potency can be too harsh for delicate skin. Lactic Acid offers the best of both worlds - gentle exfoliation plus hydration - making it ideal for sensitive skin or daily use.

For those seeking smoother texture, refined pores, and a radiant glow without compromising comfort, Lactic Acid is the smarter choice.

Why Dermalist Chooses Lactic Acid

At Dermalist, we understand that achieving results should never come at the expense of your skin barrier. That’s why our Ultra Hydrating Lactic Cleanser combines Lactic Acid with Mandelic Acid (another gentle AHA), plus soothing botanicals like Green Tea and Niacinamide. The result? Effective exfoliation that respects sensitive skin while promoting hydration, brightness, and long-term skin health.

Key Takeaways

Glycolic Acid = powerful, deep-penetrating, better for resilient skin.
Lactic Acid = gentler, hydrating, perfect for sensitive or reactive skin.
Dermalist’s formula ensures exfoliation is effective and kind to your complexion.

Ready to take the next step in your skincare?

Ultra Hydrating Lactic Cleanser

Cleanses, hydrates & strengthens skin

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