AHA (alpha hydroxy acid) is a type of a water-soluble exfoliant typically derived from sources like sugar cane, milk, or fruit. Common forms include glycolic acid, mandelic acid, and lactic acid, used in skincare when a routine calls for surface refinement through gentle chemical exfoliation rather than physical scrubbing.
Found in toners, serum, and masks, AHAs are often paired with ingredients that support hydration and balance such as hyaluronic acid, glycerin, and ceramides. They also appear in multi-acid blends designed for routines that aim to support radiance more broadly.
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How AHA Fits Into A Skincare Glow Routine
In a glow-forward skincare routine, an AHA serves as the step that refines the surface so the layers that follow can settle more cohesively.
- LAYERING — AHAs usually sit after cleansing and before hydrating steps. They work best when given a moment to settle, allowing the next layers — like essence or serum — to apply more evenly.
- TEXTURE & FORMAT — AHAs appear in many formats, from watery toners to thicker serums and mask treatments. Lighter liquids absorb quickly, while gel formats offer more cushioned application depending on what your routine prefers.
- PAIRING — AHAs are often paired with hydrating ingredients such as hyaluronic acid, glycerin, or centella-based essences, which help balance the routine after an exfoliating step. AHAs also fit well alongside ceramide-rich moisturizers that support the skin’s surface comfort.
- ROUTINE FIT — Most glow routines use AHAs a few times a week rather than daily, weaving them in on nights when you want a more refining step. They’re typically followed by softer layers like essence, serum, or moisturizer to round out the routine.
GLOW MOMENT Press an AHA toner or serum into the skin with your palms instead of swiping — this helps the formula settle evenly and keeps the step feeling intentional within your glow routine.
Why We Love AHAs For Glow
AHAs bring a surface-refining step to glow routines, creating a smoother starting point for the layers that follow. Their water-soluble nature makes them easy to incorporate into lightweight or multi-step lineups, especially on evenings when you want a more polished finish without physical exfoliation.
They also pair naturally with hydration-forward ingredients, allowing the rest of your routine — from essence to moisturizer — to sit more cohesively on the skin. In glow-focused care, that combination of refinement + balance is what makes AHAs such a reliable supporting step.
REACH FOR Paula’s Choice Skin Perfecting 8% AHA Gel Exfoliant — a leave-on glycolic acid gel that’s often used in evening routines when skin calls for a deeper reset, without the weight of a cream-based exfoliant.
This gel-exfoliant sinks in quickly and dries clear, making it easy to layer without disrupting the rest of your glow routine. It’s typically placed after cleansing and before serums on nights reserved for more surface refinement. While some exfoliants can feel more present on the skin, this one remains unobtrusive — supporting texture-focused routines without crowding the steps that follow.
FAQ
What’s the difference between AHAs and BHAs in skincare?
AHAs are water-soluble exfoliants that work on the skin’s surface, making them well-suited for routines focused on refinement and glow. BHAs, such as salicylic acid, are oil-soluble and can move through the skin’s natural oils more easily. In glow routines, the choice between AHAs and BHAs usually depends on whether the focus is surface smoothing (AHA) or deeper pore-oriented clarity (BHA).
How often can you use an AHA exfoliant in a glow-focused routine?
AHAs use varies based on concentration, formula type (toner, serum, or mask), and how many actives are already in your routine. Many glow-forward routines reserve AHAs for evenings and alternate them with hydrating or barrier-supportive steps to keep everything balanced. Finding the right frequency often comes down to observing how your skin responds over time.
Can AHAs be layered with ingredients like vitamin C, retinoids, or niacinamide?
AHAs can be layered with many common ingredients, but placement depends on strength of each step and the overall intensity of your routine. Some glow routines keep AHAs separate from stronger actives like retinoids, while others may pair AHAs with ingredients such as niacinamide or soothing humectants to maintain a sense of balance. Texture, comfort, and your routine’s rhythm usually determine the best pairing.
Are AHAs suitable for sensitive or reactive skin types?
Many AHA products come in varying strengths, textures, and formats — from gentle toners to higher-percentage gels — which gives sensitive or reactive skin options to explore. Glow-first routines often start with lower concentrations or less frequent use to help keep the skin’s surface comfortable. A patch test is generally recommended when introducing any new exfoliant.
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