There’s a moment most skincare lovers recognize. You’re standing in front of your shelf, or scrolling late at night, faced with two familiar acronyms – AHA and BHA – but wondering which one your skin actually needs.
They sound technical, slightly intimidating and yet they’re everywhere. From serums and cleansers to toners and masks, AHAs and BHAs have become skincare’s quiet power players, promising glow, clarity and smoother texture, often all at once.
It’s no accident. Research in scientific journal Clinical, Cosmetic and Investigational Dermatology shows the global AHA market is projected to reach USD 3.2 billion by 2030, driven by rising temperatures, increased sun exposure and a growing focus on preventing premature aging. Their ability to support collagen and elastin production, improve circulation and refine skin texture has made these acids essential rather than optional in modern skincare.
At Lighthouse, we believe understanding your skincare should feel empowering, not overwhelming. So let’s demystify these exfoliating acids – what they are, how they work and how to use them well – with science, simplicity and a little joy along the way.
What Is AHA And BHA?
If you’ve ever asked what is AHA and BHA, you’re not alone. These acronyms refer to two families of chemical exfoliants that help skin shed dead cells and renew itself more effectively. Both play a role in healthy skin function and are backed by dermatological research. And when used correctly, they can quietly transform how skin looks and behaves.
What Is AHA In Skincare?
AHAs – or alpha hydroxy acids – are water-soluble acids derived from sources such as fruit, milk and sugar cane. Common AHAs include glycolic acid and lactic acid. Because they work on the skin’s surface, AHAs are particularly effective at improving texture, brightness and overall radiance. They loosen the bonds between dead skin cells, allowing them to shed evenly and reveal fresher skin beneath.
Dermatologists often recommend AHAs for:
-
Dry or dull skin
-
Uneven texture
-
Fine lines and early signs of aging
-
Sun-damaged skin.
Research in scientific journal Cosmetics shows AHAs also enhance the absorption of other active ingredients, helping the rest of your routine work harder and smarter. At Lighthouse, AHA formulations are designed to deliver visible results without compromising the skin barrier – pairing exfoliation with hydration and barrier support so skin looks polished, not stressed.
What Is BHA In Skincare?
BHAs – beta hydroxy acids – are oil-soluble exfoliants. Salicylic acid is the most well-known and widely studied example.
This oil solubility is key. Unlike AHAs, BHAs can penetrate into the pore itself, where they dissolve excess sebum, clear debris and help prevent congestion before it turns into breakouts.
Salicylic acid also has natural anti-inflammatory properties, which helps calm redness and soothe active blemishes. This makes BHA especially effective for oily, combination or congestion-prone skin – but beneficial for anyone struggling with uneven pore texture. Discover our dermatologist-approved oily skin routine for clear, balanced skin that stays that way.
BHAs are commonly used to:
-
Clear clogged pores
-
Reduce blackheads and blemishes
-
Calm inflammation
-
Improve overall skin clarity.
When To Use AHA And BHA
Knowing when to use AHA and BHA is just as important as understanding what they do. AHAs are typically best used in the evening, as they can increase skin’s sensitivity to sunlight. They fit naturally into a nighttime routine focused on renewal and repair.
BHAs can be used either morning or evening, depending on formulation and skin tolerance, but many people prefer nighttime use to support overnight clarity.
The guiding principle is simple: exfoliation should support your skin, not overwhelm it. Consistency and moderation always outperform intensity.
Can I Use AHA And BHA Together?
Yes – when done thoughtfully. AHAs refine and brighten the skin’s surface, while BHAs work within pores to clear congestion. Used strategically, they complement each other beautifully.
That doesn’t always mean layering them in the same routine. Many people benefit from alternating use on different evenings, or choosing a professionally formulated product where the balance has already been carefully calibrated.
This is where dermatologist-led formulations matter.
Spotlight: SkinMedica AHA/BHA Exfoliating Cleanser
The SkinMedica AHA/BHA Exfoliating Cleanser is a masterclass in balanced exfoliation. Designed for regular use, it combines multiple exfoliating acids with skin-smoothing ingredients to deliver clarity without compromise.
A blend of AHAs – including lactic, glycolic, citric and malic acids derived from fruit extracts – gently resurfaces the skin, refining texture and boosting radiance. These work in harmony with salicylic acid (a BHA) to clear pores, regulate excess oil and help prevent congestion.
Soft jojoba spheres provide additional physical exfoliation, enhancing smoothness without irritation, while the formula maintains skin comfort and hydration.
The result is skin that feels clean, polished and balanced – never tight or overworked. With consistent use, tone appears more even, texture smoother and luminosity noticeably improved.
It’s exfoliation that feels refined, not aggressive.
How To Use Exfoliating Acids Safely
AHAs and BHAs are powerful tools. Used well, they’re transformative. Used carelessly, they can disrupt the skin barrier, especially for young, teenage skin. Our dermatologists recommend these best practices:
-
Start slowly – once or twice a week initially.
-
Use daily SPF, especially when using AHAs.
-
Avoid layering with other strong active ingredients unless advised.
-
Listen to your skin – tingling is normal, stinging is not. Exfoliation should feel like progress, not punishment.
Why Exfoliation Is A Long Game
Radiant skin isn’t built overnight. Skin renewal works on a natural cycle, and visible improvements come from steady, intelligent care rather than aggressive intervention.
AHAs and BHAs perform best as part of a wider routine that prioritises hydration, barrier repair and protection. This is where dermatologist-led skincare earns its place – ensuring each ingredient is used with intention.
At Lighthouse, exfoliating acids are never included for shock value. They’re included because they work.
The Lighthouse Approach To AHAs And BHAs
Every Lighthouse product featuring AHA or BHA is selected with one goal in mind: visible improvement, grounded in dermatological science. That means:
-
Clinically backed concentrations
-
Skin-barrier-first formulations
-
Guidance that prioritises long-term skin health.
Because great skin isn’t about doing more. It’s about doing what works.
Ready To Find Your Formula?
Once you understand what AHAs and BHAs are – and how they work – skincare stops feeling like guesswork and starts feeling intentional. Explore Lighthouse’s dermatologist-led exfoliating treatments and discover how AHA and BHA can work for your skin – with science, sophistication and results you can see. Shop the Lighthouse collection now.
