How Lactic Acid Works: The Science & Real Benefits
Lactic acid isn’t just another AHA in the crowded skincare world, it’s the ingredient dermatologists and skin experts reach for when they want results without the irritation. But what makes it so unique? Let’s decode the science in a way that actually makes sense.
The Science in Simple Terms
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What it is: A type of Alpha Hydroxy Acid (AHA), naturally derived from milk sugars but now often made synthetically for consistency.
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How it works (mechanics):
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It gently loosens the bonds between dead skin cells (desmosomes), allowing them to shed.
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It increases natural moisturising factors (NMFs), so unlike other acids, it exfoliates and hydrates.
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It helps regulate epidermal turnover, making skin look brighter and smoother over time.
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Why Lactic Acid is So Popular
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Dual-action power: It’s both an exfoliant and a hydrator, rare among actives.
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Gentle yet effective: Larger molecular size than glycolic acid means it penetrates slower, reducing irritation while still working.
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Versatility: Safe for most skin types, including sensitive and dry, unlike harsher acids.
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Clinically backed: Studies show improved fine lines, texture, and pigmentation with consistent use.
Why Lactic Acid is the Best Option for Many People
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Compared to Glycolic Acid:
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Glycolic penetrates deeper and faster → higher risk of stinging, peeling, barrier disruption.
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Lactic = slower, steadier release → more tolerable and safer for daily use.
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Compared to Salicylic Acid (BHA):
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Salicylic targets oil and pores (good for acne-prone).
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Lactic = better for hydration, glow, barrier health.
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Key Mechanic: It strengthens the skin barrier while exfoliating, something few actives can claim.
How to Use It Properly
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Best in cleansers, toners, or serums depending on tolerance.
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Ideal pH range ~3.5–4 for effectiveness without irritation.
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Frequency: Start 2–3 times per week, build up to daily.
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Always pair with SPF in the morning (acids increase sun sensitivity).
Why Dermalist’s Lactic Cleanser Stands Out
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Combines lactic + mandelic acid (layered effect for sensitivity).
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Adds niacinamide, vitamin C, and green tea to repair and protect.
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Non-foaming, barrier-respecting gel texture → avoids stripping.
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Essentially: it’s not just lactic acid in a formula, but a multifunctional, best-in-slot cleanser for both results and long-term skin health.
Lactic acid works because it respects the skin’s biology, it doesn’t just peel away layers, it rebuilds hydration and resilience at the same time. That’s why it’s the cornerstone of Dermalist’s approach: powerful results, clinically proven, without the compromise.
Ready to take the next step in your skincare?
