Introducing a new skincare acid into your regimen can significantly transform your skin tone and texture. Lactic acid and glycolic acid are two common substitutes. Both offer numerous benefits, but which one should you choose when shopping in a skincare aisle?

This article sheds light on the difference between lactic acid and glycolic acid and provides guidance on which to choose based on their unique benefits and potential to transform your skin.
What is Lactic Acid?
An important part of the skin's natural moisture barrier, lactic acid is a moderate alpha-hydroxy acid (AHA) that helps keep the skin properly hydrated. In skincare formulations, fermented dairy products like milk or cheese commonly source lactic acid.
Benefits of Lactic Acid:
- Gently exfoliates: One of the lactic acid benefits is gentle exfoliation. Lactic acid, unlike other harsher acids, exfoliates the skin softly, making it suitable for delicate skin.
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Fades pigmentation: Lactic acid can remove dark spots and hyperpigmentation. It can also treat uneven skin tone, and leave your complexion more vibrant and healthy.
- Boosts hydration: Lactic acid also possesses humectant qualities, which help the skin retain moisture, resulting in a plump, moisturized appearance.
- Improves skin texture: Lactic acid helps to smooth out uneven and rough as well as congested skin, making it soft and supple to the touch.
- Suitable for sensitive skin: Lactic acid is a moderate exfoliator suitable for dry or sensitive skin due to its larger molecular weight and hydrating properties, which reduce skin irritation.
What is Glycolic Acid?
Glycolic acid (AHA) is a water-soluble alpha hydroxy acid (AHA) derived from sugarcane. Glycolic acid has quickly become one of the most prominent AHAs used in skincare formulations, and it may offer various benefits.
Benefits of Glycolic Acid:
- Deep exfoliation: Deep exfoliation is one example of glycolic acid benefits. Glycolic acid penetrates deeply into the skin, effectively unclogging pores and eliminating dead skin cells for a smoother complexion.
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Reduces acne and clogged pores: Glycolic acid penetrates skin, unclogging pore sizes and eliminating dead skin cells for a smoother complexion. It fights acne-causing germs and reduces pore size, making it ideal for acne-prone skin.
- Fades dark spots: Glycolic acid can help remove dark spots, acne scars, and other kinds of hyperpigmentation, resulting in a more even skin tone.
- Improves skin tone and glow: You can regularly use glycolic acid to remove dark spots, acne scars, and other kinds of hyperpigmentation for a more uniform skin tone and glow.
- Speeds up skin renewal: Glycolic acid enhances skin renewal by exfoliating dead cells, promoting cell turnover, and revealing brighter, smoother skin by breaking down connections between dead cells.
Difference Between Lactic Acid and Glycolic Acid
Lactic acid is suitable for sensitive skin and glycolic acid is stronger and more effective against acne. For an overview of the fundamental distinctions between lactic and glycolic acids, refer to the table below.
Feature | Lactic Acid | Glycolic Acid |
---|---|---|
Source | Milk or fruit | Sugarcane |
Molecule Size | Larger (gentler) | Smaller (stronger) |
Penetration | Surface level | Deep into skin |
Exfoliation | Mild | Strong |
Hydration | Hydrating | Can be drying |
Skin Type | Dry & Sensitive | Oily & Acne-Prone |
Lactic Acid vs Glycolic Acid for Hyperpigmentation
For glycolic vs lactic acid for hyperpigmentation, both acids are effective with varying potency depending on skin type. For oily skin types and severe skin conditions like deep scarring or hyperpigmentation, glycolic acid is a better option. Its smaller molecular size allows deeper penetration but may irritate sensitive skin.
Glycolic Acid vs Lactic Acid Peel
For glycolic acid vs lactic acid peels, if you want a speedier, more effective exfoliant, choose a glycolic acid peel, especially if you have oily, blemish-prone skin and are not overly sensitive. Think about getting a lactic acid peel if you have sensitive skin, and want an exfoliator that is both hydrating and effective.
Is Glycolic Acid and Lactic Acid the Same Thing?

Is glycolic acid and lactic acid the same thing? Both acids are alpha hydroxy acids (AHAs) used in cosmetics for exfoliation, but their molecular size, strength, and origin vary. Glycolic acid, extracted from sugarcane, penetrates deeper and may cause irritation, making it suitable for oily, acne-prone skin. However, lactic acid, which comes from milk, provides a gentler, more superficial exfoliation that is perfect for skin that is dry or sensitive.
Lactic Acid or Glycolic Acid for Dry Skin
Lactic acid or glycolic acid for dry skin? Although both acids offer exfoliation and have potential benefits, people often prefer lactic acid for dry skin because of its softer texture and moisturizing properties. Experts typically recommend starting with lactic acid if you have extremely dry skin or are unfamiliar with chemical exfoliants.
Which is Better—Lactic Acid or Glycolic Acid?

Is glycolic acid or lactic acid better? Well, the choice between the two acids depends on skin sensitivity and desired results. Because of its low molecular weight, glycolic acid can penetrate the skin's protective layer and produce quicker results. However, it may irritate sensitive skin and increase sun sensitivity, leading to tingling, dryness, peeling, and burning. We recommend seeking advice from a dermatologist.
Conclusion
After reading this article, you probably understand the difference between lactic acid and glycolic acid. Both acids are good for skin because they keep it hydrated and soft while eliminating dark spots and dullness. Choose the one that suits your skin, but be consistent and protect it from the sun.