5% Mandelic Acid Serum
The John Jeff 5% Mandelic Acid Serum is a serums, essence, ampoule. Our analysis of its 23 ingredients (18 low-risk) rates it Excellent (92/100). Based on its ingredients, it looks well-suited to dry and sensitive skin.
The John Jeff 5% Mandelic Acid Serum is a serums, essence, ampoule. Our analysis of its 23 ingredients (18 low-risk) rates it Excellent (92/100). Based on its ingredients, it looks well-suited to dry and sensitive skin.
Summarised from our ingredient analysis — not brand marketing copy.
The evidence
Dry Skin
6/3
Oily/Acne-Prone Skin
No data
Sensitive Skin
6/5
| EWG | CIR | Ingredient Name & Cosmetic Functions | Notes |
|---|---|---|---|
1
|
|
Water
(Solvent) |
|
|
3
|
B
|
Propylene Glycol
(Fragrance, Humectant, Skin Conditioningagent Miscellaneous, Solvent, Viscosity Decreasing Agent, Skin Conditioning, Viscosity Controlling) |
Good for Dry Skin
|
|
B
|
Aloe Barbadensis Leaf Juice
(Skin Conditioning) |
Good for Sensitive Skin
|
|
1
|
|
Mandelic Acid
(Antimicrobial) |
|
|
1
|
|
Dimethyl Isosorbide
(Solvent, Viscosity Decreasing Agent, Viscosity Controlling) |
|
|
2
|
A
|
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
|
5
7
|
|
BHA
(Antioxidant, Fragrance, Masking) |
Bad for Sensitive Skin
|
|
1
|
A
|
Panthenol
(Antistatic Agent, Hair Conditioning, Skin Conditioning) |
Good for Dry Skin
|
4
|
B
|
Glycolic Acid
(Exfoliant, Ph Adjuster, Buffering Agent) |
Good for Oily Skin
Bad for Sensitive Skin
|
|
3
|
B
|
Sodium Hydroxide
(Denaturant, Ph Adjuster, Buffering Agent) |
|
|
3
|
|
PEG/PPG/Polybutylene Glycol-8/5/3 Glycerin
(Humectant) |
|
|
1
|
A
|
1,2-Hexanediol
(Solvent) |
|
|
1
|
|
Hydroxyacetophenone
(Antioxidant) |
|
|
3
|
B
|
PEG/PPG-14/7 Dimethyl Ether
(Skin Conditioning) |
|
|
3
|
B
|
Potassium Hydroxide
(Ph Adjuster, Buffering Agent) |
|
|
1
|
A
|
Xanthan Gum
(Binding Agent, Emulsion Stabilising, Skin Conditioning, Surfactant Emulsifying Agent, Viscosity Increasing Agent, Binding, Gel Forming, Viscosity Controlling) |
|
|
1
|
A
|
Allantoin
(Skin Conditioning, Skin Protecting, Soothing) |
Good for Oily Skin
Good for Sensitive Skin
|
|
1
|
A
|
Butylene Glycol
(Fragrance, Skin Conditioning, Solvent, Viscositydecreasing Agent, Humectant, Masking, Viscosity Controlling) |
Good for Dry Skin
|
|
1
|
|
Tremella Fuciformis Sporocarp Extract
(Antioxidant, Hair Conditioning, Humectant, Skin Conditioning) |
|
|
|
|
Citrus Reticulata Fruit Extract
(Skin Protecting) |
|
|
1
|
A
|
Dipotassium Glycyrrhizate
(Flavoring Agent, Skin Conditioning, Humectant) |
|
|
4
|
A
|
Phenoxyethanol
(Fragrance, Preservative) |
Paraben
|
|
1
|
A
|
Ethylhexylglycerin
(Deodorant, Skin Conditioning) |
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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.
OTC leave-on AHAs are usually 5–10%. The effect also depends on pH and free-acid value, not the percentage alone.
Mandelic Acid, 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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