Foxtale Vitamin C Serum — Efficacy 4.0/5.0, Safety 3.9/5.0 | DemythSkin
++++
[ DemythSkin Verdict ]
Foxtale Vitamin C Serum
Foxtale

Foxtale Vitamin C Serum

SerumBrightening
Efficacy
Strong
4.0 / 5.0
Safety
Mostly Safe
3.9 / 5.0
System Verdict
A genuinely potent vitamin C serum, but the added fragrance and basic packaging keep it from being truly top-tier. The efficacy score is driven mainly by 15% L-ascorbic acid near the top of the formula plus vitamin E, which is a well-supported antioxidant pairing for brightening and oxidative protection; the score is pulled down because the formula is fragrance-containing and otherwise fairly straightforward, with no extra evidence-backed support system beyond a standard emollient/solubilizer base.
Active Ingredients Detected
S Tier: Gold StandardsHigh Clinical Proof | Skin-Transformative
L Ascorbic Acid
A Tier: Good BasicsProven Results
Tocopherol
B Tier: Supporting IngredientsPromising Ingredients
Dicaprylyl CarbonateC15-19 AlkaneOctyldodecanolOctyldodecyl XylosidePEG-30 DipolyhydroxystearatePolyacrylate-13Polyisobutene
D Tier: Potential IrritantsBe Cautious
Fragrance
What Each Ingredient Does
Aqua
solvent base
L Ascorbic Acid
vitamin C antioxidant
Dicaprylyl Carbonate
light emollient
C15-19 Alkane
silky emollient
Octyldodecanol
emollient and solvent
Octyldodecyl Xyloside
emulsifier surfactant
PEG-30 Dipolyhydroxystearate
emulsifier stabilizer
Propylene Glycol
humectant solvent
Polyacrylate-13
texture stabilizer
Polyisobutene
film former
Polysorbate 20
solubilizer emulsifier
Tocopherol
vitamin E antioxidant
Ethylhexyl Glycerine
preservative booster
Phenoxyethanol
preservative
Sodium Phytate
chelator stabilizer
Fragrance
scenting agent
Full Ingredient List (INCI)

Aqua, L Ascorbic Acid, Dicaprylyl Carbonate, C15-19 Alkane, Octyldodecanol, Octyldodecyl Xyloside, PEG-30 Dipolyhydroxystearate, Propylene Glycol, Polyacrylate-13, Polyisobutene, Polysorbate 20, Tocopherol, Ethylhexyl Glycerine, Phenoxyethanol, Sodium Phytate, Fragrance

Frequently Asked

Is Foxtale Vitamin C Serum worth it?

Foxtale Vitamin C Serum scores 4.0 out of 5.0 for efficacy (Strong) and 3.9 out of 5.0 for safety (Mostly Safe) on DemythSkin's independent ingredient analysis. A genuinely potent vitamin C serum, but the added fragrance and basic packaging keep it from being truly top-tier. The efficacy score is driven mainly by 15% L-ascorbic acid near the top of the formula plus vitamin E, wh

What are the key active ingredients in Foxtale Vitamin C Serum?

Foxtale Vitamin C Serum contains these gold-standard actives with strong clinical evidence: L Ascorbic Acid.

Does Foxtale Vitamin C Serum contain fragrance or known irritants?

DemythSkin flags these ingredients in Foxtale Vitamin C Serum as potential irritants: Fragrance. This product does contain fragrance.

How is Foxtale Vitamin C Serum scored?

DemythSkin grades every product on two independent axes: efficacy (whether the ingredients have clinical evidence of working) and safety (irritation and sensitisation risk). Ingredients are classified S through D against a database of over 3,000 compounds. No brand pays for a score.

Analyze on DemythSkin →

Analysis last updated: 2026-08-07. DemythSkin is an independent ingredient analyzer. Scores are computed by a deterministic rubric from published clinical evidence — no brand pays for a score.