
Gua Sha and Jade Rollers: 90% of the Benefit Is the Massage, 10% Is the Stone
TL;DR: I spent two years comparing my $4 wooden spoon to a $90 nephrite gua sha tool. The literature on facial massage…
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TL;DR: I spent two years comparing my $4 wooden spoon to a $90 nephrite gua sha tool. The literature on facial massage…

TL;DR: I kept a daily skincare log for thirteen months. The data was unflattering. The weeks I used four or five products…

TL;DR: Most people start a routine with too many products at once and abandon it inside six weeks. The adherence research and…

TL;DR: The standard moisturizer pyramid teaches three ingredient classes as if they were rungs of a ladder. They are not a ladder.…

TL;DR: Three industry-funded RCTs (Asserin 2015, Choi 2019, Bolke 2019) are the spine of the oral collagen case. The systematic reviews built…

TL;DR: Most ceramide creams on shelves are sold on the ceramide number alone. Man 1996 and Elias 2014 showed that ceramides without…

TL;DR: Centella and azelaic acid get treated as interchangeable redness products. They are not. Centella works on the vascular and Th2 inflammation…

TL;DR: Argireline is the peptide that launched the topical-Botox marketing genre. The original Blanes-Mira 2002 paper showed wrinkle reduction in 10 women.…

TL;DR: The clean answer is morning, with sunscreen, for the photoprotective synergy documented by Lin and Burke. The honest answer is that…

TL;DR: The link between acne and depression is bidirectional and the effect sizes are larger than most patients are told. Dermatology guidelines…