The Regenerative Serum
The Eighth Day The Regenerative Serum is a serums, essence, ampoule. Our analysis of its 28 ingredients (24 low-risk) rates it Excellent (97/100). Based on its ingredients, it looks well-suited to dry skin.
The Eighth Day The Regenerative Serum is a serums, essence, ampoule. Our analysis of its 28 ingredients (24 low-risk) rates it Excellent (97/100). 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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Pentylene Glycol
(Skin Conditioning, 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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Hedychium Coronarium Root Extract
(Masking, Skin Conditioning, Tonic) |
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Tripeptide-1
(Skin Conditioning) |
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Polygonum Aviculare Extract
(Emollient) |
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Honey
(Flavoring Agent, Humectant, Emollient, Moisturising) |
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Nonapeptide-1
(Skin Conditioning, Hair Conditioning) |
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Acetyl Heptapeptide-4
(Humectant, Skin Conditioning) |
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Phytosphingosine
(Hair Conditioning, Skin Conditioning) |
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Sea Whip Extract
(Skin Conditioning) |
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Niacinamide
(Hair Conditioning, Skin Conditioning, Smoothing) |
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Hydrolyzed Hyaluronic Acid
(Hair Conditioning, Humectant, Skin Conditioning) |
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Aminobutyric Acid
(Hair Conditioning) |
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Adenosine
(Skin Conditioning) |
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Thioctic Acid
(Antioxidant) |
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Glycolic Acid
(Exfoliant, Ph Adjuster, Buffering Agent) |
Good for Oily Skin
Bad for Sensitive Skin
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Bacillus
(Skin Conditioning) |
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Polysorbate 20
(Emulsifying, Surfactant) |
Fungal Acne Trigger
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Allantoin
(Skin Conditioning, Skin Protecting, Soothing) |
Good for Oily Skin
Good for Sensitive Skin
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Caprylyl Glycol
(Hair Conditioning, Skin Conditioning, Emollient, Humectant) |
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Lecithin
(Skin Conditioning, Emulsifying, Surfactant, Antistatic Agent, Emollient) |
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Butylene Glycol
(Fragrance, Skin Conditioning, Solvent, Viscositydecreasing Agent, Humectant, Masking, Viscosity Controlling) |
Good for Dry Skin
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1,2-Hexanediol
(Solvent) |
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Dextran
(Binding Agent, Bulking Agent, Binding, Viscosity Controlling) |
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Phenoxyethanol
(Fragrance, Preservative) |
Paraben
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Ethylhexylglycerin
(Deodorant, Skin Conditioning) |
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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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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.
Most research uses 2–5%; some formulas go to 10%. Very high levels can cause flushing in sensitive skin.
Niacinamide
OTC leave-on AHAs are usually 5–10%. The effect also depends on pH and free-acid value, not the percentage alone.
Glycolic 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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Alternatives
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