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[ DemythSkin Verdict ]

Geek & Gorgeous C-Glow 15% Vitamin C Serum
SerumAntioxidant Protection
Efficacy
Strong
4.4 / 5.0
Safety
Safe
4.4 / 5.0
System Verdict
This is an S Tier antioxidant workhorse with brutal potency and minimal fluff, but it demands a careful routine and tolerance for instability. The formula nails clinical vitamin C architecture (15% L-ascorbic acid plus high ferulic acid and vitamin E in a very short, solvent-heavy base), so efficacy for brightening, collagen support and antioxidant protection is outstanding, but being water-thin, almost entirely active-focused and highly oxygen-sensitive, it sacrifices long-term stability and comfort; your results depend on using it quickly, storing it cold/dark, and pairing it with a good moisturizer and sunscreen.
Active Ingredients Detected
S Tier: Gold StandardsHigh Clinical Proof | Skin-Transformative
(L-)Ascorbic Acid
A Tier: Good BasicsProven Results
Aqua (Water)Ferulic AcidTocopherol
B Tier: Supporting IngredientsPromising Ingredients
Dimethyl IsosorbideButylene GlycolPeg/Ppg/Polybutylene Glycol-8/5/3 GlycerinPhenoxyethanolSodium Hydroxide
D Tier: Potential IrritantsBe Cautious
Ethylhexylglycerin
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DemythSkin is an independent ingredient analyzer. Scores are computed by a deterministic rubric from published clinical evidence — no brand pays for a score.