What Is Allantoin and What Does It Do for Skin?
What is allantoin? Learn what this skin conditioning ingredient does, what wound studies found, how much lotions contain and who should use it with care.
Read the articleINGREDIENTS
Skincare
ingredients.
We explain what every ingredient does, how you use it and how strong the evidence behind it is, always with the sources.
21 guidesClear, readable and always with the sources.
Alpha arbutin is everywhere. Solid human evidence is not.
What is alpha arbutin, and can it fade dark spots? How it differs from arbutin, what small trials found, the hydroquinone question and EU safety limits.
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A concentration on a label cannot tell the whole story.
What does azelaic acid do for skin? See what prescription-strength trials found for acne, rosacea and marks, why cosmetic products differ and when to seek care.
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The retinol comparison needs a closer look.
Is bakuchiol the same as retinol? Read what the small clinical trials found, how to assess a serum, and what remains unknown about its safety and results.
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What Is Centella Asiatica? Benefits for Skin
What is centella and what does it do for skin? See what centella asiatica did in studies, which skin types were tested, how to use it and what is unproven.
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What Are Ceramides? Benefits and How to Use Them
What are ceramides? Learn what these skin lipids do, what ceramide creams showed in studies, how to use them, and where the evidence still falls short.
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What Is Ectoin, and What Does It Do for Your Skin?
What is ectoin? Where this protective molecule comes from, what studies show for hydration and the skin barrier, and how to use ectoin serums and creams.
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Is Glycerin Good for Your Skin? What Studies Show
Glycerin for skin: what this humectant does, what studies show on hydration and barrier recovery, how to use it as a moisturizer and why pure glycerin differs.
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Glycolic acid exfoliates, and it lowers your burn threshold.
What does glycolic acid do for skin? See what studies found for sun damage, mild acne and dark spots, how to use it, and why it raises sun sensitivity.
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Hyaluronic acid: start with a moisture goal.
What does hyaluronic acid do for skin? Explore hydration studies, molecular weight, serum order and damp-skin claims, with clear limits and practical advice.
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An ingredient list reveals the order, not the amount.
What does the order on a skincare ingredient list tell you? Learn the 1% line, how parfum and fragrance allergens appear, and what a label leaves out.
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Is Lactic Acid Good for Your Skin? Benefits and How to Use It
Lactic acid for skin: what studies found for dryness and sun damage, how it compares with glycolic acid, how to use a serum, and why sunscreen still matters.
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What niacinamide actually does — and what it doesn't.
What does niacinamide (vitamin B3) do for skin? Effects on dark spots, oiliness and the skin barrier, the right percentage and how to layer it, with sources.
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What Is Panthenol and What Does It Do for Skin?
What does panthenol do for skin? See what studies show about hydration and irritation, how to use it, and what sensitive skin types should know.
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Peptide serums sell well, yet the research is thin.
What do peptides do for skin? See what studies found for signal, copper and neurotransmitter peptides, how to use peptide serum, and where evidence ends.
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Retinol works. Your skin just needs time.
What is retinol, what does it do for skin and how do you use it? Percentages, the adjustment phase, side effects and pregnancy, with cited studies.
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Salicylic acid does not need to leave you peeling.
What is salicylic acid and what does it do for skin? Explore BHA evidence for clogged pores, product strength, frequency, irritation and clinical peels.
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Squalene oxidizes in your sebum. Squalane was made not to.
What is squalane oil? Learn how squalane differs from squalene, where it comes from, how it works as a moisturizer and what studies have not tested yet.
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What Is Tea Tree Oil Used For? Benefits and Risks
What is tea tree oil used for on skin? See what studies show for acne-prone skin, how to use tea tree oil more safely, and why allergy and oxidation matter.
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Urea in Skin Care: What It Does and When to Use It
What does urea do for skin? What studies show on hydration and dry, flaky skin, 10% vs higher strengths, urea cream on your face and possible side effects.
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Vitamin C serum is potent. It is also easy to ruin.
How do you use a vitamin C serum, morning or night, which form and percentage to pick and how to store it? A step-by-step guide built on cited studies.
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