This is a good opportunity to address any skincare concerns you have with a targeted product such as ageing or dehydration. La Roche-Posay’s Pure Vitamin C10 Serum is a good all-rounder as it prevents and helps correct the appearance of ageing signs – even in sensitive skin. It also helps the skin to feel more hydrated, glowing and skin Good old water, aka H2O. The most common skincare ingredient of all. You can usually find it right in the very first spot of the ingredient list, meaning it’s the biggest thing out of all the stuff that makes up the product. Glycerin is already naturally found in your skin. It helps moisturize and protect your skin. A study from 2016 found glycerin to be more effective as a humectant than AHAs and hyaluronic acid. SVR Sebiaclear Hydra contains this as ingredient number 5. La Roche-Posay Effaclar Duo (+) Dual Action Acne Treatment contains this as ingredient number 4. By Lucy Partington Published: 20 February 2014. I'd heard a lot about La Roche-Posay's Effaclar Duo before they launched their 'plus' version - a reformulation of the original that apparently La Roche-Posay Effaclar Duo Dual Action Acne Treatment reduces the number and severity of acne blemishes and helps clear blackheads and whiteheads. With 5.5% micronized benzoyl peroxide and micro-exfoliating lipo-hydroxy acid, this treatment provides fast, visible results in 3 days. La Roche-Posay's Effaclar line is recognized for its effectiveness in treating acne and excessive skin oiliness. These products were developed with the help of dermatologists to ensure they are safe and effective for all skin types. The line includes products for cleaning, hydration, treatment and sun protection. Finally, the only ingredients in it that can help acne are niacinamide and salicylic acid. The problem is, niacinamide isn't usually a very effective treatment for acne, and salicylic acid is very low on the INCI list so it won't help much. It is absolutely NOT a moisturizer. Effaclar Duo is a spot treatment. It's used as an emulsion stabilizer, solvent, and a broad spectrum antimicrobial. La Roche-Posay Effaclar Duo Acne Spot Treatment ingredients explained: Benzoyl Peroxide (5.5%), Water, Isostearyl Alcohol, Glycerin, Pentylene Glycol, Silica, Carbomer, Capryloyl Salicylic Acid, Potassium Hydroxide, Tocopheryl Acetate, Acrylates/C10-30 Alkyl WJeq8Cx.