Jan Marini Skin Research, Inc. C-ESTA Serum
The Jan Marini Skin Research, Inc. C-ESTA Serum is a serums, essence, ampoule. Our analysis of its 25 ingredients (14 low-risk) rates it Great (74/100). Based on its ingredients, it looks well-suited to oily / acne-prone and dry skin. Heads up: it contains fragrance, which can irritate sensitive or reactive skin.
The Jan Marini Skin Research, Inc. C-ESTA Serum is a serums, essence, ampoule. Our analysis of its 25 ingredients (14 low-risk) rates it Great (74/100). Based on its ingredients, it looks well-suited to oily / acne-prone and dry skin. Heads up: it contains fragrance, which can irritate sensitive or reactive skin.
Summarised from our ingredient analysis — not brand marketing copy.
The evidence
| EWG | CIR | Ingredient Name & Cosmetic Functions | Notes |
|---|---|---|---|
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Water
(Solvent) |
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Sodium Hyaluronate
(Skin Conditioning, Humectant) |
Good for Dry Skin
|
|
|
|
Ascorbyl Palmitate
(Antioxidant, Masking) |
Fungal Acne Trigger
|
|
|
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Urea
(Buffering Agent, Humectant, Antistatic Agent, Skin Conditioning) |
|
|
|
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Butylene Glycol Dicaprylate/Dicaprate
(Emollient, Skin Conditioning) |
|
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Dimethicone
(Antifoaming Agent, Skin Protecting, Emollient, Skin Conditioning) |
Silicone
|
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Acetyl Tyrosine
(Skin Conditioning, Tanning) |
|
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Dimethyl MEA
(Ph Adjuster, Buffering Agent) |
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Fragrance
(Deodorant, Masking, Perfuming) |
|
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Sodium Hydroxide
(Denaturant, Ph Adjuster, Buffering Agent) |
|
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Tocopheryl Acetate
(Antioxidant, Skin Conditioning) |
Bad for Oily Skin
|
|
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Pantethine
(Emollient, Hair Conditioning) |
|
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|
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Zinc Sulfate
(Cosmetic Astringent, Cosmetic Biocide, Oral Care Agent, Antimicrobial, Antiplaque) |
|
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Ergothioneine
(Antioxidant) |
|
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Pyridoxine HCl
(Hair Conditioning, Skin Conditioning, Antistatic Agent) |
|
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Sodium Metabisulfite
(Antioxidant, Preservative, Reducing) |
|
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Xanthan Gum
(Binding Agent, Emulsion Stabilising, Skin Conditioning, Surfactant Emulsifying Agent, Viscosity Increasing Agent, Binding, Gel Forming, Viscosity Controlling) |
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Disodium EDTA
(Chelating Agent, Viscosity Controlling) |
|
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Farnesol
(Fragrance, Deodorant, Masking, Solvent, Soothing) |
Allergens
|
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Linalool
(Fragrance, Deodorant, Masking) |
Allergens
|
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Phenoxyethanol
(Fragrance, Preservative) |
Paraben
|
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Methylparaben
(Fragrance, Preservative) |
Paraben
|
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Butylparaben
(Fragrance, Preservative, Masking) |
Paraben
|
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Ethylparaben
(Fragrance, Preservative) |
Paraben
|
|
|
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Propylparaben
(Fragrance, Preservative, Perfuming) |
Paraben
|
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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
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.
Ascorbyl Palmitate
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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