What is lactic acid in skincare?
Lactic acid is an alpha-hydroxy acid originally derived from milk, now usually produced by fermentation. Its molecule is larger than glycolic acid’s, so it penetrates more slowly and irritates less – which makes it the AHA of choice for drier or more reactive skin.
It is also part of the skin’s own natural moisturising factor, so unlike most exfoliants it hydrates while it resurfaces. Research shows it increases ceramide production in the stratum corneum.
What skin concerns does lactic acid treat?
It smooths dullness, flakiness and rough texture, fades pigmentation and post-acne marks, and softens fine lines. Because it improves barrier lipids at the same time, it suits dry, mature and mildly sensitive skin better than stronger acids.
A controlled study pairing lactic acid with ceramides found measurable gains in both moisturisation and even shedding within two weeks.
What ingredients are best paired with lactic acid?
Ceramides are the standout partner, since lactic acid supports the skin making its own. Hyaluronic acid, glycerin, squalane and panthenol round out the hydration side.
Niacinamide layers comfortably, and vitamin C works well on alternate mornings. Keep it out of the same step as retinoids or BHAs while your skin adjusts, start twice weekly, and use SPF daily. Take our Skin Quiz.
What are clogged pores?
A clogged pore is a hair follicle blocked by a mix of sebum, dead skin cells and debris. Left open to the air the plug oxidises and darkens into a blackhead; sealed over by skin it becomes a whitehead or closed comedone.
Clogged pores are the starting point of nearly all acne – the microcomedone forms first, and inflammation follows only if bacteria and immune response get involved.
What causes clogged pores?
Excess sebum and abnormal keratinisation are the two mechanics. When the follicle lining sheds cells faster than they can clear, they bind with oil and form a plug.
Comedogenic products (heavy oils, some silicones and waxes), thick makeup worn for long stretches, humidity, sweat left on the skin, hormonal shifts and insufficient cleansing all contribute. So does over-cleansing, which damages the barrier and drives oil production up.
What ingredients are best for clogged pores?
Salicylic acid is the first choice because it is oil-soluble and works inside the pore rather than just on the surface. Glycolic and lactic acid clear the surface layer, and clay masks absorb excess oil weekly.
Retinoids are the most effective long-term fix, because they change how the follicle sheds in the first place. Add niacinamide to regulate sebum and keep the barrier intact, and switch to non-comedogenic, lightweight hydrators. Take our Skin Quiz to find products that will not re-clog you.
