Salicylic Acid

Salicylic acid is a beta hydroxy acid that dissolves the bonds between dead cells on the skin's surface and inside the pore lining. Unlike water-soluble acids, it moves through oil, which means it can reach sebum-filled follicles where blackheads and blemishes begin.

What it actually does

Salicylic acid is lipophilic. It travels through sebum and intercellular lipids to reach the stratum corneum and the follicular wall. Once there, it disrupts the desmosomes, the protein bridges that hold corneocytes together. This breaks down the compact plug of keratin and sebum that blocks a pore. The result is that dead material loosens and lifts away, reducing comedone formation and allowing trapped sebum to surface.

It also has mild anti-inflammatory properties. It reduces prostaglandin synthesis in the skin, which means less redness around active lesions. At concentrations between 0.5 and two per cent, it works on both open and closed comedones without stripping the skin of necessary lipids. Transepidermal water loss remains stable when formulated correctly, because salicylic acid does not disrupt the broader lipid matrix the way some surfactants can.

The OVESSI point of view

We borrow from Korean layered care and use salicylic acid in thin, patient applications rather than high-shock formulas. A 0.5 per cent toner applied daily over damp skin offers slow, cumulative exfoliation without triggering the rebound oil production that aggressive peels can cause. A two per cent spot treatment, dabbed only where needed, keeps the dose honest and the skin calm. This is Scandinavian restraint meeting Japanese precision. We do not ask one ingredient to solve everything. Instead, we place it inside a ritual where hydration and barrier support surround it. The formula architecture matters. We pair salicylic acid with soothing extracts and humectants so the follicle clears without the surrounding tissue becoming dry or reactive.

What to expect, and when

Day zero to day three: your skin may feel slightly smoother as surface cells begin to loosen. You will not see visible change yet. Day four to day ten: existing blackheads may rise to the surface and clear more easily during cleansing. New blemishes may still appear, because turnover in the follicle takes time. Day eleven to day twenty-one: pore congestion decreases. Texture becomes more even. Active breakouts resolve faster than they did before. Day twenty-two to day twenty-eight: the skin settles into a quieter baseline. Pores remain clearer between applications. This is not a transformation. It is a gradual reduction in blockage and inflammation, sustained by consistent use rather than a single dramatic moment.

How to layer it in your ritual

Salicylic acid belongs in the treat step, after cleansing and toning with a hydrating preparation. In the morning, apply a 0.5 per cent toner to damp skin, then follow immediately with a hydrating essence and a light moisturiser before sunscreen. At night, the same toner can be used, or a two per cent spot treatment applied directly to areas of congestion. Let it absorb for thirty seconds, then layer your serum and night cream over the top. If your skin is dry or sensitive, use salicylic acid only at night and only three to four times per week. Oily and combination types can tolerate daily use morning and night, provided hydration and barrier support remain generous. Do not combine with other strong acids in the same application.

Where it lives on our shelf

We formulated salicylic acid into two quiet, considered treatments. The Purify : Salicylic Purifying Toner holds it at 0.5 per cent in a thin, watery base designed for daily sweeping across the whole face. It clears without stripping. For localised congestion, The Spot : Targeted Blemish Concentrate delivers two per cent salicylic acid in a gel that stays where you place it, paired with centella and niacinamide to calm inflammation while the pore clears. Both belong in rituals where hydration and patience are built in from the start.

Common questions

Can I use salicylic acid if my skin is dry? Yes, at lower concentrations and reduced frequency, paired with generous hydration before and after.

Does it work on closed comedones as well as blackheads? Yes, because it penetrates the follicle wall and loosens the keratin plug from inside the pore.

Will it make my skin purge at first? Some congestion may surface faster in the first ten days, but genuine purging is rare at concentrations below two per cent when layered correctly.

Reviewed by

Danny Isaac, Head of Product Development, OVESSI.
Last reviewed: June 2026.

Further reading

A short, curated set of references where the science behind this page is documented in peer-reviewed literature.

1. Dall'oglio F, Tedeschi A, Fabbrocini G, et al. Cosmetics for acne: indications and recommendations for an evidence-based approach. G Ital Dermatol Venereol. 2015;150(1):1-11. PMID: 25315288.
2. Akarsu S, Fetil E, Yücel F, et al. Efficacy of the addition of salicylic acid to clindamycin and benzoyl peroxide combination for acne vulgaris. J Dermatol. 2012;39(5):433-8. PMID: 22035285.
3. Platsidaki E, Markantoni V, Balamoti E, et al. Combination of 30% Salicylic Acid Peels and Mechanical Comedo Extraction for the Treatment of Favre-Racouchot Syndrome. Acta Dermatovenerol Croat. 2019;27(1):42-43. PMID: 31032792.