serums
C-Glow 15% Vitamin C Serum
Provides the same 15% L-Ascorbic + Ferulic + Vitamin E formula as premium brands but solves the oxidation problem by manufacturing fresh batches every week. It is the best high-potency, low-cost Vitamin C serum on the market for those who prioritize ingredient freshness.
Quality & Materials
15% L-Ascorbic Acid, Ferulic Acid, and Tocopherol. Water-light consistency with no unnecessary thickeners or fragrances.
Evidence & Testing
Uses the well-established clinical ratio for Vitamin C absorption; while the brand lacks SkinCeuticals-level RCTs, the formulation parameters (pH 3.2-3.4) align with proven science.
Brand Transparency
Exceptional transparency; they list the manufacture date on every bottle and advise refrigeration to maintain potency.
Value Assessment
At roughly $13-15, it provides approximately 90% of the efficacy of a $180 serum for less than 1/10th of the price.
Why Not Alternatives?
Most budget serums (like The Ordinary) use water-free formulas that feel gritty or derivatives that are less effective; C-Glow uses the superior water-based Duke formula but avoids the shelf-life issues of mass-market retail.
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