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[ DemythSkin Verdict ]

Dermalogica

Dermalogica Biolumin-C Serum

Name: Dermalogica Biolumin-C Serum
Brand: Dermalogica

SerumBrightening

Efficacy

Strong

4.4 / 5.0

Safety

Mostly Safe

3.9 / 5.0

System Verdict

Potent, cleverly-formulated vitamin C serum with real brightening and anti-aging chops—but the fragrant citrus and limonene keep it from being a universally safe darling. Efficacy is high because you get an ultra-stable vitamin C complex (Ascorbyl Methylsilanol Pectinate + Aminopropyl Ascorbyl Phosphate) supported by S Tier antioxidants (vitamin E) and a peptide (Palmitoyl Tripeptide-5) in the top half of the INCI, plus lactic acid and multiple humectants for texture and mild exfoliation. I’m holding it below true S Tier because we don’t know exact %s of the vitamin C derivatives, the lactic acid is likely at a gentle, non-peel level, and the fragrant citrus oils add irritation risk that slightly undermines an otherwise sophisticated base.

Active Ingredients Detected

S Tier: Gold StandardsHigh Clinical Proof | Skin-Transformative

Lactic Acid

A Tier: Good BasicsProven Results

GlycerinSodium PCASodium HyaluronateTocopherolTrehaloseHelianthus Annuus (Sunflower) Seed Oil

B Tier: Supporting IngredientsPromising Ingredients

EthoxydiglycolPalmitoyl Tripeptide-5Ascorbyl Methylsilanol PectinateDipotassium GlycyrrhizateAminopropyl Ascorbyl PhosphatePolyacrylate-13PolyisobuteneGlyceryl PolyacrylateTetrasodium Glutamate Diacetate

C Tier: Marketing IdolsHype | Limited or Weak Data

Sophora Japonica Flower Extract

D Tier: Potential IrritantsBe Cautious

Salvia Hispanica Seed OilCitrus Grandis (Grapefruit) Peel OilLimonene

What Each Ingredient Does

Water/Aqua/Eau: Solvent base
Glycerin: Humectant hydration
Butylene Glycol: Humectant, penetration aid
Ethoxydiglycol: Solvent, enhances penetration
Lactic Acid: AHA exfoliant, pH adjuster
Salvia Hispanica Seed Oil: Emollient, omega-rich
Sodium PCA: Humectant, NMF component
Palmitoyl Tripeptide-5: Peptide, anti-aging support
Sophora Japonica Flower Extract: Antioxidant, skin-protecting
Ascorbyl Methylsilanol Pectinate: Vitamin C derivative, antioxidant
Sodium Hyaluronate: Hyaluronic acid humectant
Tocopherol: Vitamin E antioxidant
Dipotassium Glycyrrhizate: Soothing, anti-inflammatory
Aminopropyl Ascorbyl Phosphate: Vitamin C derivative, brightening
Trehalose: Humectant, osmoprotectant
Polyacrylate-13: Texture, film-forming polymer
Propanediol: Humectant, solvent
Citrus Grandis (Grapefruit) Peel Oil: Fragrance, aromatic oil
Helianthus Annuus (Sunflower) Seed Oil: Emollient, fatty acid source
Polyisobutene: Texture enhancer, film former
Methylpropanediol: Solvent, humectant
Carrageenan: Thickener, stabilizer
Pentylene Glycol: Humectant, preservative booster
Glyceryl Polyacrylate: Film-forming, texture agent

Full Ingredient List (INCI)

Water/Aqua/Eau, Glycerin, Butylene Glycol, Ethoxydiglycol, Lactic Acid, Salvia Hispanica Seed Oil, Sodium PCA, Palmitoyl Tripeptide-5, Sophora Japonica Flower Extract, Ascorbyl Methylsilanol Pectinate, Sodium Hyaluronate, Tocopherol, Dipotassium Glycyrrhizate, Aminopropyl Ascorbyl Phosphate, Trehalose, Polyacrylate-13, Propanediol, Citrus Grandis (Grapefruit) Peel Oil, Helianthus Annuus (Sunflower) Seed Oil, Polyisobutene, Methylpropanediol, Carrageenan, Pentylene Glycol, Glyceryl Polyacrylate, Caprylyl Glycol, Ethylhexylglycerin, Tetrasodium Glutamate Diacetate, Xanthan Gum, Polysorbate 20, Limonene, Sodium Hydroxide, Phenoxyethanol.

Frequently Asked

Is Dermalogica Biolumin-C Serum worth it?

Dermalogica Biolumin-C Serum scores 4.4 out of 5.0 for efficacy (Strong) and 3.9 out of 5.0 for safety (Mostly Safe) on DemythSkin's independent ingredient analysis. Potent, cleverly-formulated vitamin C serum with real brightening and anti-aging chops—but the fragrant citrus and limonene keep it from being a universally safe darling. Efficacy is high because you get an ultra-stable

What are the key active ingredients in Dermalogica Biolumin-C Serum?

Dermalogica Biolumin-C Serum contains these gold-standard actives with strong clinical evidence: Lactic Acid.

Does Dermalogica Biolumin-C Serum contain fragrance or known irritants?

DemythSkin flags these ingredients in Dermalogica Biolumin-C Serum as potential irritants: Salvia Hispanica Seed Oil, Citrus Grandis (Grapefruit) Peel Oil, Limonene.

How is Dermalogica Biolumin-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.

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Analysis last updated: 2026-07-06. 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.