Actives: Retinaldehyde (retinal)
Retinal: one step closer to retinoic acid, and what that does and does not prove.
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B Supported, with caveats
Retinol vs retinal under $40: five drugstore retinoids, graded
Retinal sits one conversion step closer to the form that acts in skin. We checked five drugstore retinoids for disclosed strength, price per ml…