Promise Serum
The Keys Soulcare Promise Serum is a serums, essence, ampoule. Our analysis of its 21 ingredients (19 low-risk) rates it Excellent (98/100). Based on its ingredients, it looks well-suited to dry and sensitive skin.
The Keys Soulcare Promise Serum is a serums, essence, ampoule. Our analysis of its 21 ingredients (19 low-risk) rates it Excellent (98/100). Based on its ingredients, it looks well-suited to dry and sensitive 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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Niacinamide
(Hair Conditioning, Skin Conditioning, Smoothing) |
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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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Propylene Glycol
(Fragrance, Humectant, Skin Conditioningagent Miscellaneous, Solvent, Viscosity Decreasing Agent, Skin Conditioning, Viscosity Controlling) |
Good for Dry Skin
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Erythritol
(Humectant, Moisturising) |
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Zinc PCA
(Skin Conditioning, Humectant) |
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PPG-10 Methyl Glucose Ether
(Hair Conditioning, Skin Conditioning) |
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Tremella Fuciformis Sporocarp Extract
(Antioxidant, Hair Conditioning, Humectant, Skin Conditioning) |
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3-O-ETHYL ASCORBIC ACID
(Skin Conditioning) |
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Camellia Sinensis Leaf Powder
(Exfoliating) |
Good for Oily Skin
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Tocopheryl Acetate
(Antioxidant, Skin Conditioning) |
Bad for Oily Skin
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PEG-32
(Binding Agent, Humectant, Solvent) |
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PEG-180
(Binding Agent, Humectant, Solvent) |
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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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Coceth-7
(Emulsifying, Surfactant) |
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PPG-1-PEG-9 Lauryl Glycol Ether
(Emulsifying, Surfactant) |
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PEG-40 Hydrogenated Castor Oil
(Fragrance, Emulsifying, Surfactant, Perfuming) |
Fungal Acne Trigger
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Disodium EDTA
(Chelating Agent, Viscosity Controlling) |
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Phenoxyethanol
(Fragrance, Preservative) |
Paraben
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Ethylhexylglycerin
(Deodorant, Skin Conditioning) |
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Caprylyl Glycol
(Hair Conditioning, Skin Conditioning, Emollient, Humectant) |
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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.
3-O-ETHYL ASCORBIC ACID
Most research uses 2–5%; some formulas go to 10%. Very high levels can cause flushing in sensitive skin.
Niacinamide
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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Alternatives
Products that share the most of this item's ingredient list.
Other products people analyze alongside this one.