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Close-up image of hands holding a cosmetics retinoid serum bottle, perfect for skincare themes.

The Retinoid Sandwich Method Isn’t Just for Sensitive Skin — Here’s When It Helps, When It Doesn’t, and the Proper Technique

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A reader messaged me last spring asking for my opinion on her evening routine. She’d been on prescription tretinoin 0.05% […]

The Retinoid Sandwich Method Isn’t Just for Sensitive Skin — Here’s When It Helps, When It Doesn’t, and the Proper Technique Read Post »

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