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Medik8 Crystal Retinal 6 is a night serum built on encapsulated retinaldehyde, a fast-acting form of vitamin A, paired with hyaluronic acid for hydration. It sits in the middle of Medik8's numbered Crystal Retinal ladder, so it suits skin that has already adjusted to lower strengths. Reviewers rate it for smoothing fine lines and texture without the peeling many retinol users expect. It is a step up in potency from entry-level retinols and a gentler option than prescription tretinoin.
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Lowest price we've seen: $105.00 on Nov 10 at Niche Beauty. Tracked across 1 store since Nov 10.
Reviewers generally rate Crystal Retinal 6 highly for smoothing fine lines and improving skin texture, and many say it is gentler than expected for a retinal. Some report irritation when they use it too often or start at this strength too soon.
