BHA stands for beta-hydroxy acid and is considered a chemical exfoliant.
Types of BHAs:
- Salicylic Acid is the gold standard for BHAs. It’s well-studied and widely used for oily and acne-prone skin.
- Betaine Salicylate is a gentler alternative to salicylic acid, often found in K-beauty products. While milder, it’s not as well-proven.
Once applied to skin, BHAs work on both the surface of the skin and inside your pores.
The best part? BHAs are oil-soluble, meaning they can penetrate into pores, dissolve oil, and help regulate excess sebum.
Best use
BHAs are best used for:
- Deep cleaning pores
- Preventing acne and blackheads
- Reducing inflammation or redness
- Controlling oil throughout the day
Ingredient Compatibility
BHAs can be paired with certain ingredients for even better results.
Some people with sensitive skin may find combining too many actives may cause irritation.
Some good combinations include:
- Nacinamide: Double the oil control
- Zinc: Help fight acne without clashing
- Hydrating ingredients like hyaluronic acid can help the skin maintain moisture while BHAs exfoliate.
When using BHA, sensitive skin types should be cautious of combining:
- Retinoids
- AHAs
- Vitamin C
Using these ingredients together can cause irritation because it can be too strong when layered. Be sure to patch test. Some ingredients, like Vitamin C, can be used in the same day but not at the same time (Vitamin C in the morning, BHA in the evening).
Percentages
Salicylic acid is commonly used at 0.5% - 2%. 2% is the most effective concentration for over-the-counter products. In many countries, getting a higher percentage requires a prescription.
If you're new to BHAs, start slow (2-3x a week) and increase as tolerated.
