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#vitamin-c
Evidence-based articles tagged “vitamin-c”, with supporting research and authority sources.
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4 articles
7 Small-Brand Skincare Gems With Near-Perfect Retailer RatingsSeven products from Korean brands with fewer than 20 catalog items each are sitting at 4.8-4.9 retailer-reported stars on Olive Young US - here's what's actually in them, and how much of the science behind their key actives holds up.
Are Darphin's Vitamin C Capsules Worth It?Darphin's "Pro-Vitamin C" capsules use tetrahexyldecyl ascorbate, not L-ascorbic acid - and most of the clinical evidence for that specific form comes from companies with a stake in the ingredient. Here's what that means next to three L-ascorbic acid serums under $15.
Do Niacinamide, Vitamin C, and Hyaluronic Acid Work for Hair?Niacinamide, vitamin C, and hyaluronic acid have real skin evidence, but the hair shaft is dead keratin and the living follicle sits below where a topical product can reasonably reach — so the growth claims for all three rest on cell dishes and lab organ culture, not on working scalps.
Do You Need to Refrigerate Skincare?Skincare fridges are mostly a comfort gadget, not a stability fix — but the exception is real chemistry, not marketing. L-ascorbic acid vitamin C measurably oxidizes faster with heat, and "probiotic" viability is a genuine formulation problem the industry solves with dry, encapsulated bases rather than a fridge shelf.