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Vitamin A is a tricky ingredient to navigate. Too strong of a formula can wreak havoc on skin not primed for its formula, and too low a percentage makes for slow, barely noticeable results. Crystal Retinal expertly demonstrates the difference between retinal and retinol—the former is the more potent, fast-working version of vitamin A, while the latter is slower and more tolerable for most skin types. Because of this, Medik8’s Crystal Retinal line supplies the powerhouse ingredient in various strengths depending on skill level: 1, 3, 6, 10, 20, 24. Regardless of which one you choose, the formula is designed to reduce the appearance of fine lines and wrinkles and firm and brighten the skin. Of course, a retinal-heavy routine needs cushion, so this formula packs hyaluronic acid, glycerin, and vitamin E to calm the skin.
Best for: All skin types
Key ingredients: Retinaldehyde
Size: 1 fl oz
Medik8 rating: 4.8/5 stars
An ELLE editor says: “My introduction to Medik8 was through its Crystal Retinal line. Confident in my already retinol-primed skin, I started at CR6 a few times a week and noticed the peeling effects almost immediately. So I decreased the intensity to the CR3 and found this to be my sweet spot. I still see my renewed skin peeking through the flakes, and my face looks more radiant and smoother.”—Nerisha Penrose, ELLE.com beauty commerce editor