Ingredient Encyclopedia

Mandelic acid is a gentle alpha hydroxy acid (AHA) derived from bitter almonds. Its larger molecular size makes it slower to penetrate the skin, which reduces irritation compared to glycolic acid while still promoting exfoliation and brighter, more even skin tone. This guide explains what mandelic acid does, who it suits, how to use it safely, and potential side effects. What is Mandelic Acid? Mandelic acid is an AHA that helps loosen the bonds between dead skin cells, encouraging gentle exfoliation. Because of its larger molecule, it penetrates more slowly and is less likely to cause stinging or redness, making it suitable for sensitive or reactive skin types. It can improve overall skin texture, reduce pigmentation irregularities, and support product absorption. Key Benefits Gentle Resurfacing: Smooths uneven texture without harsh irritation. Improves Skin Tone: Reduces appearance of hyperpigmentation and dark spots over time. Less Stinging than Glycolic: Ideal for beginners or sensitive skin types. Supports Cell Turnover: Encourages healthy, radiant skin over weeks of use. Can Help Reduce Blemishes: Mild antibacterial properties may assist acne-prone skin. Who Should Use It? Sensitive skin types looking for a mild exfoliant. Individuals with darker skin tones seeking gentle brightening without irritation. Beginners who want to introduce chemical exfoliation gradually. Who Should Avoid It? Those currently overusing other strong actives such as retinoids, benzoyl peroxide, or other AHAs/BHAs. People with compromised skin barriers, eczema flare-ups, or open wounds. Those allergic to almonds or mandelic acid (rare). How to Use It in a Routine Use at night 1–3 times per week, depending on tolerance. Apply after cleansing and before serums or moisturisers. Follow with a nourishing moisturiser to maintain barrier integrity. Always wear SPF 30+ the following day, as AHAs increase sun sensitivity. Concentration & Formulation Most over-the-counter mandelic acid serums contain 5–10% concentrations, suitable for home use. Professional treatments can reach higher concentrations (20–40%) and should be done under dermatological supervision. Formulations may also include soothing ingredients like hyaluronic acid, aloe vera, or niacinamide to reduce irritation. Possible Side Effects Mild tingling or redness immediately after application (normal and temporary). Dryness or slight peeling if overused or layered with multiple actives. Increased sensitivity to sunlight; SPF is essential during daytime. Verdict Mandelic acid is a beginner-friendly AHA that gently exfoliates while improving tone and texture. Ideal for sensitive and darker skin types, it provides noticeable results with minimal irritation when used consistently. 👉 Ready to try mandelic acid? Discover our Mandelic Resurfacing Serum — a gentle yet effective serum for smooth, radiant skin. FAQs Is Mandelic Acid safe for sensitive skin?Yes, its larger molecule makes it gentler than many AHAs. Start slowly and moisturise afterward. Can I combine Mandelic Acid with other actives?Yes, but avoid layering with strong acids or prescription retinoids in the same routine. Consider alternating nights for best results. How long until I see results?Many users notice smoother skin within a week, with improved tone and radiance after 4–6 weeks of consistent use. Related: Lactic Acid Guide · Glycolic Acid Guide · Niacinamide Guide References PubMed: Mandelic Acid in Dermatology American Academy of Dermatology – AHAs Explained Healthline: Mandelic Acid Benefits for Skin Written by: Sarah Mitchell, Skincare Writer & Brand Educator Reviewed by: Dr. Priya Kaur, Consultant Dermatologist