Malic Acid
Malic Acid — an alpha hydroxy acid found naturally in apples that provides mild surface exfoliation and is often used to support other acids in a blend. It has a larger molecule than glycolic or lactic acid, so on its own it is relatively gentle. It is commonly included in multi-acid formulas to round out exfoliation and help balance the overall effect.
Key points
- Malic acid is a naturally occurring AHA, notably present in apples and other fruits.
- It is usually milder than glycolic and lactic acids and is frequently used as a secondary acid in blends.
- It contributes to gentle surface exfoliation, helping smooth texture and support a brighter appearance.
- Because it is often combined with stronger acids, its effects are typically part of a broader formula.
- Standard AHA precautions apply, including daily sunscreen use.
Frequently asked
Is malic acid strong enough to use on its own?
It provides gentle exfoliation but is generally considered milder than glycolic or lactic acid, so it is most often blended with other acids for a fuller effect. Some products do feature it more prominently for a low-irritation option.
Where does malic acid come from?
It occurs naturally in fruits such as apples, though cosmetic-grade malic acid is usually produced synthetically for consistency and purity. Its name comes from the Latin word for apple.
Related topics
This is a foundational entry in the SYNC Skin Encyclopedia and is expanded over time. Educational information only — not medical advice.
