Peter Thomas Roth FIRMx Growth Factor Extreme Neuropeptide Serum
The Peter Thomas Roth FIRMx Growth Factor Extreme Neuropeptide Serum is a serums, essence, ampoule. Our analysis of its 48 ingredients (41 low-risk) rates it Excellent (94/100). Based on its ingredients, it looks well-suited to dry skin.
The Peter Thomas Roth FIRMx Growth Factor Extreme Neuropeptide Serum is a serums, essence, ampoule. Our analysis of its 48 ingredients (41 low-risk) rates it Excellent (94/100). Based on its ingredients, it looks well-suited to dry 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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Glycerin
(Denaturant, Fragrance, Hair Conditioning, Humectant, Oral Care Agent, Oral Health Care Drug, Skin Protecting, Viscosity Decreasing Agent, Perfuming, Solvent) |
Good for Dry Skin
Fungal Acne Trigger
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Caprylic/Capric Triglyceride
(Emollient, Masking, Perfuming, Skin Conditioning, 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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Squalane
(Emollient, Hair Conditioning, Refatting, Skin Conditioning) |
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Cyclopentasiloxane
(Hair Conditioning, Skin Conditioning, Emollient, Solvent) |
Silicone
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Dimethicone
(Antifoaming Agent, Skin Protecting, Emollient, Skin Conditioning) |
Silicone
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Silica
(Abrasive, Absorbent, Anticaking Agent, Bulking Agent, Opacifying, Viscosity Controlling) |
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Dimethiconol
(Antifoaming Agent, Skin Conditioning, Emollient, Moisturising) |
Silicone
|
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Sodium PCA
(Hair Conditioning, Humectant, Antistatic Agent, Skin Conditioning) |
Good for Dry Skin
|
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Urea
(Buffering Agent, Humectant, Antistatic Agent, Skin Conditioning) |
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Ethylhexyl Cocoate
(Skin Conditioning, Emollient) |
Fungal Acne Trigger
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Hexapeptide-10
(Humectant) |
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Myristoyl Pentapeptide-17
(Skin Conditioning) |
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Palmitoyl Hexapeptide-19
(Skin Conditioning) |
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Acetyl hexapeptide-22
(Antioxidant, Reducing, Skin Protecting) |
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Quercus Suber Bark Extract
(Skin Conditioning) |
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Hydrolyzed Oats
(Hair Conditioning, Skin Conditioning, Antistatic Agent) |
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Acetyl Dipeptide-1 Cetyl Ester
(Hair Conditioning, Skin Conditioning) |
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Retinyl Palmitate (Vitamin A) |
Good for Dry Skin
Fungal Acne Trigger
|
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Tocopheryl Acetate
(Antioxidant, Skin Conditioning) |
Bad for Oily Skin
|
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Ascorbyl Palmitate
(Antioxidant, Masking) |
Fungal Acne Trigger
|
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Arginine
(Fragrance, Hair Conditioning, Skin Conditioning, Antistatic Agent, Masking) |
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Phospholipids
(Skin Conditioning) |
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Dimethylmethoxy Chromanyl Palmitate
(Skin Conditioning) |
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Polysorbate 20
(Emulsifying, Surfactant) |
Fungal Acne Trigger
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Isohexadecane
(Skin Conditioning, Emollient, Solvent) |
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Ammonium Polyacryloyldimethyl Taurate
(Emulsion Stabilising, Viscosity Increasing Agent, Viscosity Controlling) |
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Glycerin/Isophthalic Acid Copolymer Castorate
(Film Forming) |
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Polysilicone-11
(Film Forming) |
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Sodium Acrylate/Sodium Acryloyldimethyl Taurate Copolymer
(Anticaking Agent, Emulsion Stabilising, Opacifying, Suspending Agent Nonsurfactant, Viscosity Increasing Agent) |
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Polysorbate 80
(Denaturant, Emulsifying, Surfactant) |
Fungal Acne Trigger
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Trehalose
(Flavoring Agent, Humectant, Moisturising) |
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Polyquaternium-51
(Film Forming, Humectant, Skin Conditioning) |
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Sodium Hyaluronate
(Skin Conditioning, Humectant) |
Good for Dry Skin
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Triacetin
(Cosmetic Biocide, Fragrance, Plasticizer, Solvent, Antimicrobial, Film Forming, Masking) |
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Acrylates Copolymer
(Adhesive, Artificial Nail Builder, Binding Agent, Film Forming, Hair Fixing, Suspending Agent Nonsurfactant, Antistatic Agent, Binding) |
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Dextran
(Binding Agent, Bulking Agent, Binding, Viscosity Controlling) |
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Carbomer
(Emulsion Stabilising, Viscosity Increasing Agent, Gel Forming, Viscosity Controlling) |
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Dipropylene Glycol
(Fragrance, Solvent, Viscosity Decreasing Agent, Masking, Viscosity Controlling) |
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Laureth-3
(Emulsifying, Surfactant) |
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Hydroxyethylcellulose
(Binding Agent, Emulsion Stabilising, Film Forming, Viscosity Increasing Agent, Binding, Stabilising, Viscosity Controlling) |
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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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Caprylyl Glycol
(Hair Conditioning, Skin Conditioning, Emollient, Humectant) |
|
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Diazolidinyl Urea
(Preservative) |
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Methylparaben
(Fragrance, Preservative) |
Paraben
|
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Propylparaben
(Fragrance, Preservative, Perfuming) |
Paraben
|
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Glutamylamidoethyl Indole
(Skin Protecting) |
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.
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
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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