Brand catalog
Medik8
1 product reviews. Published formulas and prices are checked separately for each product.
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What distinguishes the Medik8 entries
Medik8 has 1 entry in this reviewed catalog, covering fine lines. The product notes below identify the decision that changes each review. A catalog name can cover a fixed manufactured medicine, an individualized formula or a set; the linked review preserves that distinction.
Crystal Retinal
A formula labeled 0.1% retinaldehyde is not the same preparation as a 0.1% tretinoin prescription. Crystal Retinal makes that distinction especially useful because its retail range contains several numbered strengths. The Formula Review considers it as a cosmetic comparison while retaining the molecule and vehicle behind each number. We examined the current US product page and direct return policy on October 14, 2026. This is a public-source review, with no sample analysis, product-use trial or personal treatment assessment. Its purpose is to connect the actual formulation with the specific study or purchase claim, rather than letting the general language of vitamin A supply an equivalence that has not been established.
Primary product source ↗
A missing bar means the selected price basis was not normalized here, not that the product is free. Full quantities, conflicting figures and additional fees remain in each review.
Fine lines01
Medik8
Retinaldehyde variants 0.01%–0.24%, with separate full ingredient declarations
Nonprescription retinaldehyde formula comparison↗
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Catalog scope is limited to the skin products listed here and documented on our coverage page. It is not a claim to list every medicine a clinician can prescribe.
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