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Sebum is your skin's protective oil. Too much causes acne and oily-skin issues; too little causes dryness and barrier breakdown. Both extremes…
Most of the damage you'll see on your face at 35 was set in motion at 25. Nine patterns, every one of…
Your skin runs slightly acidic, about pH 4.7 to 5.5. That subtle acidity does a surprising amount of work, and most skin…
Most skin problems aren't really about acne or aging or pigmentation. They're about a damaged barrier. Once you understand it, half of…
Five products in the wrong order works worse than three products in the right order. Here's the actual sequence, with the parts…
Healthy skin loses a little water through evaporation. Damaged skin loses a lot more. Once you understand TEWL, your routine probably needs…
Most people can't tell if their skincare is working because the timeline is slower than their patience. Here's a four-week tracking method…
Most people get their own skin type wrong, and the category you're working from shapes every other decision you make. Here's a…
Three products: a gentle cleanser, a moisturizer that suits your skin, broad-spectrum SPF 30. Most beginners would do better staying on the…
Dry skin is a type. Dehydrated skin is a state. Most readers who think they have dry skin are actually dehydrated —…