TAHNYC Luminescence Brightening Vitamin C + Peptides Serum — Efficacy 4.0/5.0, Safety 4.9/5.0 | DemythSkin
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[ DemythSkin Verdict ]
TAHNYC Luminescence Brightening Vitamin C + Peptides Serum

TAHNYC Luminescence Brightening Vitamin C + Peptides Serum

SerumHyperpigmentation, dark spots, radiance
Efficacy
Strong
4.0 / 5.0
Safety
Excellent
4.9 / 5.0
System Verdict
Solid brightening serum with stable Vitamin C and targeted peptides, but lacks proven synergies and concentration transparency for elite status. Efficacy score of 4.0 reflects strong 15% 3-O-Ethyl Ascorbic Acid (stable derivative effective at 2%+ per clinical data) paired with Tetrapeptide-30 for hyperpigmentation, optimal water-based pH for Vit C stability (~3.5-4), and clean packaging; deducting for unspecified peptide concentrations, absence of Vitamin E/ferulic synergy, and basic humectant base without penetration enhancers.[1][2][3]
Active Ingredients Detected
S Tier: Gold StandardsHigh Clinical Proof | Skin-Transformative
3-O-Ethyl Ascorbic Acid (Vitamin C)
A Tier: Good BasicsProven Results
AquaSodium Hyaluronate
B Tier: Supporting IngredientsPromising Ingredients
Plant Derived PropanediolTetrapeptide-30Acetyl Tetrapeptide-401,2-HexanediolHydroxyacetophenoneCaprylyl GlycolNaturally Derived Tetrasodium Glutamate Diacetate
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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.