The Ordinary: We do not recommend combining Vitamin C (L-Ascorbic Acid, Ethylated L-Ascorbic Acid or Vitamin C Derivatives) with Niacinamide with Direct or Ethylated Vitamin C and Vitamin C Derivatives. This is due to the formation of a salt complex that has the potential to reduce the integrity of both compounds. The best anti-aging face serums that work for your 20s, 30s, 40s, 50s, 60s and over for all skin types, including sensitive and oily. Skin type: Normal, dry, combination and oily | Key The Ordinary is known for its effective and affordable formulas, so if you've ever wondered which of its serums is the best for your skin type and concerns, look no further. Here, we tapped two board-certified dermatologists and a DECIEM expert to find the best skincare routines for every skin type. Kiehl's Ultra Pure 1.5% Hyaluronic Acid Serum. With 1.5% hyaluronic acid as the only active ingredient, Kiehl's Ultra Pure High-Potency 1.5% hyaluronic acid serum is a simple but targeted courtesy. $35, dermstore.com. If your skin is dull and/or dry and/or moisturizer alone just doesn't seem to do much, Dr. Frieling suggests adding this serum to your routine. She lauds it for combining reparative niacinamide with hyaluronic acid and glycerin, both humectants that attract water to and hold it in the skin. Courtesy of brand. Revision Skincare's Gentle Cleansing Lotion. $36. Retinoids can be drying, so Clay tops hers with La Roche-Posay Toleriane Double Repair Moisturizer, or, if she needs something .

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