When dermatologists at the University of Michigan asked thirty‑six volunteers aged between seventy and ninety‑three to apply a 0.4 percent vitamin A lotion to one forearm for twenty‑four weeks, the treated skin’s fine‑wrinkle score dropped by 1.64 points while the untreated arm barely budged at 0.08. Those numbers do more than nudge curiosity – they signal that measurable change […]
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