Vitamin C Serum

Alterra Naturkosmetik

Where to buy Possibly in stock

About this product

The Alterra Naturkosmetik Vitamin C Serum is a emulsion. Our analysis of its 18 ingredients (9 low-risk) rates it Excellent (95/100). Heads up: it contains fragrance, which can irritate sensitive or reactive skin.

Vegan-friendly Reef-safe

Summarised from our ingredient analysis — not brand marketing copy.

At a glance

Type
Emulsion
Ingredients
18
Low-risk
9
Fragrance
Contains fragrance
Origin
Germany
Data updated
May 2026

The evidence

Quick Product Notes

Paraben-Free Sulfate-Free Alcohol-Free Silicone-Free EU Allergen-Free Fungal Acne (Malassezia) Safe

Notable Effects & Ingredients

No Notable Effects & Ingredients

Ingredients Related to Skin Types

Good   Bad — tap a skin type to see which ingredients · estimated from ingredient functions
Dry Skin 1/5
Good for dry skin
Glycerin
Caution for dry skin
Maltodextrin Xanthan Gum Glycerin Sodium Hydroxide Heptyl Glucoside
Oily/Acne-Prone Skin No data
Sensitive Skin 2/5
Good for sensitive skin
Ascorbyl Glucoside Glycerin
Caution for sensitive skin
Glycerin Sodium Benzoate Potassium Sorbate Linalool Citronellol

Ingredients list

18 total
Lower hazard (1) Higher hazard (5)
All18 Skin Conditioning9 Fragrance6 Emulsion Stabilising4 Masking3 Hair Conditioning3 Perfuming3 Film Forming2 Preservative2
EWG CIR Ingredient Name & Cosmetic Functions Notes
1
Water
(Solvent)
Vitis Vinifera Fruit Water
(Skin Conditioning)
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
Good for Dry Skin
Fungal Acne
Fungal Acne Trigger
1
Ascorbyl Glucoside
(Antioxidant)
Heptyl Glucoside
(Surfactant)
1
A
Xanthan Gum
(Binding Agent, Emulsion Stabilising, Skin Conditioning, Surfactant Emulsifying Agent, Viscosity Increasing Agent, Binding, Gel Forming, Viscosity Controlling)
Malpighia Glabra Fruit Juice
(Skin Conditioning)
3
A
Sodium Benzoate
(Fragrance, Preservative, Anticorrosive, Masking)
Citrus Aurantium Dulcis Flower Extract
(Skin Conditioning)
3
A
Potassium Sorbate
(Fragrance, Preservative)
1
Cocoyl Proline
(Hair Conditioning, Skin Conditioning)
Rubus Idaeus Leaf Extract
(Skin Conditioning)
3
B
Sodium Hydroxide
(Denaturant, Ph Adjuster, Buffering Agent)
1
A
Maltodextrin
(Absorbent, Binding Agent, Emulsion Stabilising, Film Forming, Hair Conditioning, Skin Conditioning, Suspending Agent Nonsurfactant, Binding)
Heptanol
(Perfuming)
PARFUM
(Fragrance, Perfuming)
5
Linalool
(Fragrance, Deodorant, Masking)
Allergens
Allergens
5
Citronellol
(Fragrance, Masking)
Allergens
Allergens

My Ingredient Notes

No personal ingredient notes yet. Save ingredients to your profile to get good/bad alerts here.

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Key ingredients

Vitis Vinifera Fruit Water
Skin Conditioning
Glycerin
Humectant, Skin Protecting
Ascorbyl Glucoside
Antioxidant
Xanthan Gum
Skin Conditioning
Malpighia Glabra Fruit Juice
Skin Conditioning
Citrus Aurantium Dulcis Flower Extract
Skin Conditioning

Benefits

No standout benefits flagged for this product.

Concerns

Contains eu allergen
Not fungal acne (malassezia) safe
May not suit dry skin
May not suit sensitive skin

Ingredients explained

Water
Solvent
Low-hazard ingredient.Read moreShow less
EWG 1 Solvent
Vitis Vinifera Fruit Water
Skin conditioning
Limited public safety data.Read moreShow less
EWG N/A Skin conditioning
Ascorbyl Glucoside
Antioxidant
Low-hazard ingredient.Read moreShow less
EWG 1 Antioxidant
Heptyl Glucoside
Surfactant
Limited public safety data.Read moreShow less
EWG N/A Surfactant
Xanthan Gum
Binding agent, Emulsion stabilising
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Binding agentEmulsion stabilisingSkin conditioningSurfactant -emulsifying agentViscosity increasing agentBindingGel formingViscosity controlling
Malpighia Glabra Fruit Juice
Skin conditioning
Limited public safety data.Read moreShow less
EWG N/A Skin conditioning
Sodium Benzoate
Fragrance, Preservative
Low-to-moderate hazard.Read moreShow less
EWG 3 CIR A FragrancePreservativeAnticorrosiveMasking
Citrus Aurantium Dulcis Flower Extract
Skin conditioning
Limited public safety data.Read moreShow less
EWG N/A Skin conditioning
Potassium Sorbate
Fragrance, Preservative
Low-to-moderate hazard.Read moreShow less
EWG 3 CIR A FragrancePreservative
Cocoyl Proline
Hair conditioning, Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 Hair conditioningSkin conditioning
Rubus Idaeus Leaf Extract
Skin conditioning
Limited public safety data.Read moreShow less
EWG N/A Skin conditioning
Sodium Hydroxide
Denaturant, Ph adjuster
Low-to-moderate hazard.Read moreShow less
EWG 3 CIR B DenaturantPh adjusterBuffering agent
Maltodextrin
Absorbent, Binding agent
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A AbsorbentBinding agentEmulsion stabilisingFilm formingHair conditioningSkin conditioningSuspending agent - nonsurfactantBinding
Heptanol
Perfuming
Limited public safety data.Read moreShow less
EWG N/A Perfuming
PARFUM
Fragrance, Perfuming
Limited public safety data.Read moreShow less
EWG N/A FragrancePerfuming
Glycerin
Denaturant, Fragrance
Low-hazard ingredient.Read moreShow less
EWG 2 CIR A DenaturantFragranceHair conditioningHumectantOral care agentOral health care drugSkin protectingViscosity decreasing agentPerfumingSolvent Good for Dry SkinFungal-acne trigger
Linalool
Fragrance, Deodorant
Moderate-hazard ingredient.Read moreShow less
EWG 5 FragranceDeodorantMasking Allergens
Citronellol
Fragrance, Masking
Moderate-hazard ingredient.Read moreShow less
EWG 5 FragranceMasking Allergens

How to use

How to use

  • 1 Morning works well: Antioxidants like vitamin C pair well with daytime use under sunscreen.

General guidance from this product's category and active ingredients — always follow the directions on the package.

Trust & honesty

Effective levels — general guide

The concentrations these actives are typically effective at in research — not a measurement of this product.

Vitamin C (ascorbic) 5–20%

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 Glucoside

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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