Dr. Brenner C Serum — Efficacy 4.4/5.0, Safety 4.3/5.0 | DemythSkin
++++
[ DemythSkin Verdict ]
Dr. Brenner C Serum
Dr.

Dr. Brenner C Serum

SerumAntioxidant Protection
Efficacy
Strong
4.4 / 5.0
Safety
Safe
4.3 / 5.0
System Verdict
This is a legitimately high-efficacy vitamin C serum with a no-frills but smartly constructed antioxidant base. The efficacy score is high because it uses pure L-ascorbic acid in a classic synergistic system with vitamin E and ferulic acid, supported by solvents like ethoxydiglycol and propylene glycol that help keep vitamin C dissolved and active, plus humectants (glycerin, sodium hyaluronate, panthenol) that improve skin feel and tolerance; the main limitations are unknown exact concentration and pH, lack of additional stabilizing packaging info, and the presence of a surfactant-type helper (Laureth-23) that suggests a more functional, less elegant texture than premium comparators.
Active Ingredients Detected
S Tier: Gold StandardsHigh Clinical Proof | Skin-Transformative
L-Ascorbic Acid (Vitamin C)
A Tier: Good BasicsProven Results
GlycerinTocopherol (Vitamin E)Sodium Hyaluronate (Hyaluronic Acid)Ferulic AcidPanthenol
B Tier: Supporting IngredientsPromising Ingredients
Ethoxydiglycol
What Each Ingredient Does
Water
Solvent; base of formula
Ethoxydiglycol
Solvent; enhances solubility
L-Ascorbic Acid (Vitamin C)
Antioxidant and brightening active
Propylene Glycol
Humectant and solvent
Glycerin
Humectant; improves hydration
Laureth-23
Surfactant and solubilizer
Tocopherol (Vitamin E)
Antioxidant; supports formula stability
Sodium Hyaluronate (Hyaluronic Acid)
Humectant; water-binding agent
Ferulic Acid
Antioxidant; stabilizes vitamin C
Panthenol
Humectant and soothing agent
Triethanolamine
pH adjuster and buffering agent
Phenoxyethanol
Preservative to prevent microbial growth
Full Ingredient List (INCI)

Water, Ethoxydiglycol, L-Ascorbic Acid (Vitamin C), Propylene Glycol, Glycerin, Laureth-23, Tocopherol (Vitamin E), Sodium Hyaluronate (Hyaluronic Acid ), Ferulic Acid, Panthenol, Triethanolamine, Phenoxyethanol

Frequently Asked

Is Dr. Brenner C Serum worth it?

Dr. Brenner C Serum scores 4.4 out of 5.0 for efficacy (Strong) and 4.3 out of 5.0 for safety (Safe) on DemythSkin's independent ingredient analysis. This is a legitimately high-efficacy vitamin C serum with a no-frills but smartly constructed antioxidant base. The efficacy score is high because it uses pure L-ascorbic acid in a classic synergistic system with vitamin

What are the key active ingredients in Dr. Brenner C Serum?

Dr. Brenner C Serum contains these gold-standard actives with strong clinical evidence: L-Ascorbic Acid (Vitamin C).

Does Dr. Brenner C Serum contain fragrance or known irritants?

DemythSkin's analysis found no flagged irritants in Dr. Brenner C Serum. It scores 4.3 out of 5.0 for safety.

How is Dr. Brenner 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.

Buy on Amazon →Analyze on DemythSkin →

Analysis last updated: 2026-08-21. DemythSkin is an independent ingredient analyzer. Scores are computed by a deterministic rubric from published clinical evidence — no brand pays for a score. DemythSkin earns commission from affiliate links (Amazon Associates and others). Scores are computed before any commercial relationship — the link follows the verdict, never the other way around.