BHA (Beta Hydroxy Acid) Best Exfoliant Anti-Blemish Blackhead Reducing Soothing BHA (Beta Hydroxy Acid) at a glance Also known as salicylic acid Best known for exfoliating/anti-blemishes properties Helps skin shed in a manner that mimics youthful skin Works most effectively in leave-on formulas with a pH range between 3-4 Oil solubility lets it exfoliate inside the pore to alleviate breakouts, congestion, and blackheads BHA (Beta Hydroxy Acid) description BHA is an acronym for beta hydroxy acid, which is more commonly known as salicylic acid. Salicylic acid (also called beta hydroxy acid or BHA) is a desmolytic ingredient, which means it is able to exfoliate by dissolving the bonds that hold the dead cells to skin’s surface. Because salicylic acid is oil soluble, it also has the ability to penetrate into the pore lining and exfoliate inside the pore. This makes it especially effective for reducing breakouts, including blackheads and whiteheads. Salicylic acid is recognised as a topical exfoliating ingredient by the European Union/ United Kingdom. Even though salicylic acid is best known for its ability to address acne-prone skin concerns, it offers many additional properties that any skin type can benefit from. Case in point, by exfoliating the build-up of dead skin on the surface, it also helps reverse the appearance of dull, uneven skin tone, as well as other visible signs of ageing skin. Unlike physical exfoliants (such as a rough facial scrub), salicylic acid offers hydrating properties that enhance the result of smooth, soft skin. Another unique advantage is salicylic acid’s ability to gently soothe aggravated skin thanks to its inherent calming properties. Salicylic acids works most effectively as a leave-on treatment, ideally within a pH range between 3 and 4. Rinse-off salicylic acid cleansers typically have a higher pH, which likely won’t offer much of an exfoliation benefit. Not to mention the contact time with skin is very brief - but the salicylic acid may at least offer skin-calming benefits in this form and can be included in amounts as low as 0.5% to achieve this benefit. Research shows using salicylic acid at a 1-2% concentration is recommended for regular exfoliation within a skin care routine. Salicylic acid has been found to be safe on all skin tones and ethnicities. Note that BHA is the structural name for salicylic acid and is completely unrelated to the preservative ingredient BHA (butylated hydroxyanisole). Related ingredients: Salicylic Acid