Peter Thomas Roth Oily Problem Skin Instant Mineral SPF 30
The Peter Thomas Roth Oily Problem Skin Instant Mineral SPF 30 is a sunscreen. Our analysis of its 32 ingredients (26 low-risk) rates it Excellent (88/100). Based on its ingredients, it looks well-suited to oily / acne-prone skin.
The Peter Thomas Roth Oily Problem Skin Instant Mineral SPF 30 is a sunscreen. Our analysis of its 32 ingredients (26 low-risk) rates it Excellent (88/100). Based on its ingredients, it looks well-suited to oily / acne-prone skin.
Summarised from our ingredient analysis — not brand marketing copy.
The evidence
| EWG | CIR | Ingredient Name & Cosmetic Functions | Notes |
|---|---|---|---|
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Titanium/Titanium Dioxide
(Cosmetic Colorant, Opacifying) |
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Zinc Oxide
(Bulking Agent, Cosmetic Colorant, Skin Protecting, Sunscreen Agent) |
Good for Oily Skin
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Illite
(Abrasive, Absorbent, Anticaking Agent, Bulking Agent) |
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Silica
(Abrasive, Absorbent, Anticaking Agent, Bulking Agent, Opacifying, Viscosity Controlling) |
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Barium Sulfate
(Cosmetic Colorant, Opacifying) |
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Tapioca Starch
(Viscosity Increasing Agent) |
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Aluminum Starch Octenylsuccinate
(Absorbent, Anticaking Agent, Viscosity Increasing Agent, Viscosity Controlling) |
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Aluminum Hydroxide
(Emollient, Humectant, Opacifying, Skin Protecting, Viscosity Controlling) |
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Stearic Acid
(Fragrance, Sufactant, Emulsifying, Surfactantsurfactant Cleansing Agent Is Included As A Function For The Soap Form Of Stearic Acid., Emulsion Stabilising, Masking, Refatting) |
Bad for Oily Skin
Fungal Acne Trigger
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Salicylic Acid
(Antiacne Agent, Antidandruff Agent, Corn/Callus/Wart Remover, Denaturant, Exfoliant, Fragrance, Hair Conditioning, Skin Conditioning, Keratolytic, Masking, Preservative) |
Good for Oily Skin
Bad for Sensitive Skin
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Salix Alba (Willow) Bark Extract | |
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Retinyl Palmitate (Vitamin A) |
Good for Dry Skin
Fungal Acne Trigger
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Ascorbyl Palmitate
(Antioxidant, Masking) |
Fungal Acne Trigger
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Tocopheryl Acetate
(Antioxidant, Skin Conditioning) |
Bad for Oily Skin
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Dimethicone/Vinyl Dimethicone Crosspolymer
(Viscosity Controlling) |
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Magnesium Myristate
(Anticaking Agent, Slip Modifier, Viscosity Increasing Agent, Opacifying, Viscosity Controlling) |
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Kaolin
(Abrasive, Absorbent, Anticaking Agent, Bulking Agent, Opacifying, Skin Protecting, Slip Modifier) |
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Maltodextrin
(Absorbent, Binding Agent, Emulsion Stabilising, Film Forming, Hair Conditioning, Skin Conditioning, Suspending Agent Nonsurfactant, Binding) |
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Triethoxycaprylylsilane
(Binding Agent, Binding) |
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Water
(Solvent) |
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Butylene Glycol
(Fragrance, Skin Conditioning, Solvent, Viscositydecreasing Agent, Humectant, Masking, Viscosity Controlling) |
Good for Dry Skin
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Chlorphenesin
(Cosmetic Biocide, Antimicrobial, Preservative) |
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Potassium Sorbate
(Fragrance, Preservative) |
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Tetrasodium EDTA
(Chelating Agent) |
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Bismuth Oxychloride
(Colorant, Cosmetic Colorant) |
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Iron Oxides
(Colorant, Cosmetic Colorant) |
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Manganese Violet
(Colorant, Cosmetic Colorant) |
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Chromium Oxide Greens
(Cosmetic Colorant, Hair Dyeing) |
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Chromium Hydroxide Green
(Cosmetic Colorant, Hair Dyeing) |
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Ferric Ferrocyanide
(Colorant, Cosmetic Colorant) |
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Aluminum Powder
(Colorant, Cosmetic Colorant) |
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Carmine
(Cosmetic Colorant, Fragrance) |
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.
Topical retinoids (retinol, retinaldehyde, retinyl esters) are widely advised against in pregnancy as a precaution. The strongest evidence is for ORAL retinoids; topical absorption is low, but most clinicians err on the side of caution.
Low-strength topical salicylic acid (BHA) is generally considered fine. Caution is usually reserved for high-strength leave-on products and salicylic peels.
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.
Most studied between 0.1% and 1%. Higher is not automatically better — irritation climbs with dose, so a well-formulated lower strength is often the sweet spot.
Retinyl Palmitate (Vitamin A)
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
Salicylic acid is OTC-capped at 2%; 0.5–2% is the usual leave-on range. Much below that it acts more as a soothing agent than an exfoliant.
Salicylic Acid
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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