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1
One time purchase
$22.99
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$19.54$22.99
Delivers every 6 weeks
Description
The one that started it all: 20% L-ascorbic acid and little else — four ingredients, no fragrance and no fillers. If you want the most-studied form of vitamin C at full strength, this is the purist's serum.
Why fresh matters
20% L-ascorbic ...
Reviews
5.0
2 ratings
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C20
Great serum that I have been using for years.
P
Patricia · January 7, 2026
Absolutely great stuff… I’ve been using it for years now