# Salicylic acid (encapsulated)

Source: https://theconstantbeauty.com/ingredients/salicylic-acid/
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Publisher: The Constant (theconstantbeauty.com). Cite as "The Constant".
Generated: 2026-09-16T18:18Z

- **INCI name:** Salicylic Acid
- **Common name:** Salicylic acid (encapsulated)
- **Typical use range:** 0.5–2%
- **Evidence tier:** literature-backed
- **Functions:** exfoliant

## What it does

Salicylic acid is a beta hydroxy acid (BHA) and the only common exfoliant that is oil-soluble. That property lets it move through sebum into the pore lining, where it loosens the bonds between dead cells that would otherwise build up. The visible outcomes are clearer-looking pores, smoother texture and less surface shine, which is why it is a mainstay for oily and blemish-prone skin.

In cosmetic products it is used at 0.5–2%. In the EU it is restricted to 2% in leave-on products and is not used in products for children under three. Free salicylic acid can sting or dry at the surface, especially when combined with other actives.

Encapsulation addresses that. The acid is held in a carrier that releases it gradually after application, so the same dose reaches the pore over time rather than all at once. The aim is the same exfoliation with a calmer feel, which matters in a multi-active serum used every day. Sunscreen in the morning remains non-negotiable.

## Notes

Salicylic acid is a beta hydroxy acid (BHA) and the only common exfoliant that is oil-soluble. That property lets it move through sebum into the pore lining, where it loosens the bonds between dead cells that would otherwise build up. The visible outcomes are clearer-looking pores, smoother texture and less surface shine, which is why it is a mainstay for oily and blemish-prone skin.

In cosmetic products it is used at 0.5–2%. In the EU it is restricted to 2% in leave-on products and is not used in products for children under three. Free salicylic acid can sting or dry at the surface, especially when combined with other actives.

Encapsulation addresses that. The acid is held in a carrier that releases it gradually after application, so the same dose reaches the pore over time rather than all at once. The aim is the same exfoliation with a calmer feel, which matters in a multi-active serum used every day. Sunscreen in the morning remains non-negotiable.

## Used in

- [Multi-Active Complex Face Serum](https://theconstantbeauty.com/product/multi-active-complex-serum/)

## References

1. CosIng, Salicylic Acid (EU cosmetic ingredient database) <https://ec.europa.eu/growth/tools-databases/cosing/>
2. PubChem, Salicylic acid (CID 338) <https://pubchem.ncbi.nlm.nih.gov/compound/338>
3. Arif T. Salicylic acid as a peeling agent: a comprehensive review. Clin Cosmet Investig Dermatol. 2015;8:455–461.
4. Regulation (EC) No 1223/2009 on cosmetic products, Annex III (restricted substances), salicylic acid entry.