Obagi C-Clarifying Serum
The Obagi C-Clarifying Serum is a serums, essence, ampoule. Our analysis of its 6 ingredients (5 low-risk) rates it Excellent (83/100). Based on its ingredients, it looks well-suited to oily / acne-prone and dry skin.
The Obagi C-Clarifying Serum is a serums, essence, ampoule. Our analysis of its 6 ingredients (5 low-risk) rates it Excellent (83/100). Based on its ingredients, it looks well-suited to oily / acne-prone and dry skin.
Summarised from our ingredient analysis — not brand marketing copy.
The evidence
| EWG | CIR | Ingredient Name & Cosmetic Functions | Notes |
|---|---|---|---|
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Hydroquinone
(Antioxidant, Fragrance, Hair Dyeing Reducing, Skin Bleaching Agent, Hair Dyeing) |
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Propylene Glycol
(Fragrance, Humectant, Skin Conditioningagent Miscellaneous, Solvent, Viscosity Decreasing Agent, Skin Conditioning, Viscosity Controlling) |
Good for Dry Skin
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Propylene Carbonate
(Solvent, Viscosity Decreasing Agent, Viscosity Controlling) |
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Ascorbic Acid (Vitamin C)
(Antioxidant, Fragrance, Ph Adjuster, Skin Conditioning, Buffering Agent, Masking) |
Good for Dry Skin
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Water
(Solvent) |
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Sodium Lauryl Sulfate
(Cleansing, Denaturant, Emulsifying, Foaming, Surfactant) |
Bad for Oily Skin
Sulfate
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No personal ingredient notes yet. Save ingredients to your profile to get good/bad alerts here.
EWG flags hazard, not real-world risk — ratings don't account for how much of an ingredient a product contains. Treat these as things to research, not verdicts. How we score →
How to use
General guidance from this product's category and active ingredients — always follow the directions on the package.
Trust & honesty
Contains ingredients some choose to avoid or double-check while pregnant or nursing.
Commonly advised to avoid in pregnancy because a relatively high proportion is absorbed through the skin.
This is general information, not medical advice. Pregnancy guidance varies and depends on concentration and your individual situation — always check with your doctor, midwife or pharmacist. How we flag this.
The concentrations these actives are typically effective at in research — not a measurement of this product.
L-ascorbic acid is usually used at 5–20% (around 10–15% is common). Above ~20% adds little and tends to irritate more; it also needs a low pH to work.
Ascorbic Acid (Vitamin C)
INCI lists don't disclose amounts, and we don't claim to know this product's levels — these are the ranges these ingredients are usually effective at, so you can tell a real formula from "fairy-dusting" a marketed active. How we estimate this.
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