BHA stands for beta hydroxy acid, a chemical exfoliant prized for treating acne and clogged pores. The most common BHA in skincare is salicylic acid. Here is how it works, its benefits, and how to use it safely.

What Are BHAs?

BHAs are oil-soluble acids that penetrate deep into pores to remove dead skin cells, excess oil and dirt. They are derived from sources such as willow bark and wintergreen leaves, with salicylic acid being the most widely used. Browse BHA exfoliants to get started.

How Do BHAs Work?

Because they are oil-soluble, BHAs reach inside pores and dissolve the bond between dead skin cells and sebum that causes clogs. They also calm inflammation, offer mild antibacterial action against acne-causing bacteria, regulate the pore lining to reduce the look of enlarged pores, and promote cell turnover to clear excess keratin.

Benefits of BHAs

Regular use reduces acne breakouts and blackheads, minimises the appearance of pores, improves skin texture and tone, calms redness and inflammation, and helps fade hyperpigmentation such as dark spots and sun damage. They suit most skin types and pair well with an oily skin control routine.

Risks and Precautions

BHAs can be drying, so start with a low concentration and patch-test first. Key cautions include irritation and dryness, sun sensitivity (always use sunscreen SPF 30+), over-exfoliation if combined with other harsh acids, and an initial purge of breakouts that usually settles within a few weeks. Avoid open or broken skin, and consult a doctor if pregnant, breastfeeding or using other topical medications.

Final Thoughts

BHAs are a powerful, multi-tasking ingredient for clearer, smoother, more even-toned skin, as long as you start slow, patch-test and protect with daily SPF. For stronger resurfacing, a professional chemical peel is another option. If you have sensitive skin or a pre-existing condition, consult a dermatologist for personalised guidance.