Isotonic Hydra-Serum

Oskia

Where to buy Possibly in stock

About this product

The Oskia Isotonic Hydra-Serum is a serums, essence, ampoule. Our analysis of its 47 ingredients (41 low-risk) rates it Excellent (100/100). Based on its ingredients, it looks well-suited to oily / acne-prone and dry skin.

Vegan-friendly Reef-safe

Summarised from our ingredient analysis — not brand marketing copy.

At a glance

Type
Serums, Essence, Ampoules
Ingredients
47
Low-risk
41
Fragrance
Fragrance-free
Origin
United Kingdom

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 9/9
Good for dry skin
Gluconolactone Glutamic Acid Betaine Sodium PCA Sodium Hyaluronate Glycerin Sodium Lactate PCA Lecithin
Caution for dry skin
Maltodextrin Inulin Lauryl Carbamate Xanthan Gum Glycerin Alcohol Hydrogenated Lecithin Sodium Hydroxide Silica Lecithin
Oily/Acne-Prone Skin 1/0
Good for oily/acne-prone skin
Alcohol
Sensitive Skin 1/15
Good for sensitive skin
Glycerin
Caution for sensitive skin
Glycine Gluconolactone Glutamic Acid Serine Sodium Chloride Alanine Arginine Glycerin Threonine Phenethyl Alcohol Proline Citric Acid Alcohol Sodium Benzoate Potassium Sorbate

Ingredients list

47 total
Lower hazard (1) Higher hazard (3)
All47 Skin Conditioning42 Fragrance14 Hair Conditioning14 Humectant11 Antistatic Agent10 Viscosity Controlling9 Masking8 Emulsion Stabilising7
EWG CIR Ingredient Name & Cosmetic Functions Notes
Lavandula Angustifolia Flower Water
(Skin Conditioning)
1
Water
(Solvent)
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
Dimethyl Sulfone
(Solvent, Viscosity Decreasing Agent, Viscosity Controlling)
1
A
Niacinamide
(Hair Conditioning, Skin Conditioning, Smoothing)
1
A
Panthenol
(Antistatic Agent, Hair Conditioning, Skin Conditioning)
Good for Dry Skin
Good for Dry Skin
1
Acetyl Glucosamine
(Skin Conditioning)
1
Leuconostoc/Radish Root Ferment Filtrate
(Antidandruff Agent, Antimicrobial)
1
Gluconolactone
(Fragrance, Humectant, Solvent)
1
A
Sodium Hyaluronate
(Skin Conditioning, Humectant)
Good for Dry Skin
Good for Dry Skin
Avena sativa Kernel Extract
(Abrasive, Antioxidant, Skin Conditioning, Skin Conditioning Emollient)
1
Calcium Ketogluconate
(Skin Conditioning)
1
B
Betaine
(Hair Conditioning, Humectant, Antistatic Agent, Skin Conditioning, Viscosity Controlling)
1
A
Sodium Gluconate
(Chelating Agent, Skin Conditioning)
1
Sodium Chloride
(Bulking Agent, Masking, Oral Care Agent, Viscosity Controlling)
1
B
Sodium PCA
(Hair Conditioning, Humectant, Antistatic Agent, Skin Conditioning)
Good for Dry Skin
Good for Dry Skin
Bisabolol
(Fragrance, Skin Conditioning, Soothing)
Aesculus Hippocastanum Seed Extract
(Skin Conditioning)
Butyrospermum Parkii Butter
(Skin Conditioning, Viscosity Controlling)
1
Potassium Chloride
(Viscosity Increasing Agent, Viscosity Controlling)
Bad for Oily Skin
Bad for Oily Skin
Pentapeptide-59
(Skin Conditioning)
1
Polyglutamic Acid
(Skin Conditioning)
3
B
PCA
(Humectant, Moisturising)
3
B
Sodium Lactate
(Buffering Agent, Exfoliant, Humectant, Keratolytic)
1
A
Serine
(Fragrance, Hair Conditioning, Skin Conditioning, Antistatic Agent, Masking)
1
A
Alanine
(Fragrance, Hair Conditioning, Skin Conditioning, Antistatic Agent, Masking)
1
A
Glycine
(Buffering Agent, Fragrance, Hair Conditioning, Skin Conditioning Agent Miscellaneous, Antistatic Agent, Skin Conditioning)
1
A
Glutamic Acid
(Fragrance, Hair Conditioning, Humectant, Antistatic Agent)
1
A
Lysine HCL
(Hair Conditioning, Skin Conditioning)
1
A
Threonine
(Fragrance, Hair Conditioning, Skin Conditioning, Antistatic Agent, Hair Waving Or Straightening)
1
A
Arginine
(Fragrance, Hair Conditioning, Skin Conditioning, Antistatic Agent, Masking)
1
A
Proline
(Fragrance, Hair Conditioning, Skin Conditioning)
1
Inulin Lauryl Carbamate
(Emulsion Stabilising, Surfactant)
1
A
Sclerotium Gum
(Emulsion Stabilising, Skin Conditioning, Viscosity Increasing Agent, Viscosity Controlling)
2
A
Hydrogenated Lecithin
(Skin Conditioning, Emulsifying, Surfactant, Suspending Agent Nonsurfactant)
1
A
Pullulan
(Binding Agent, Film Forming, Binding)
1
2
A
Silica
(Abrasive, Absorbent, Anticaking Agent, Bulking Agent, Opacifying, Viscosity Controlling)
1
A
Maltodextrin
(Absorbent, Binding Agent, Emulsion Stabilising, Film Forming, Hair Conditioning, Skin Conditioning, Suspending Agent Nonsurfactant, Binding)
2
A
Citric Acid
(Chelating Agent, Fragrance, Ph Adjuster, Buffering Agent, Masking)
Bad for Sensitive Skin
Bad for Sensitive Skin
3
A
Sodium Benzoate
(Fragrance, Preservative, Anticorrosive, Masking)
1
A
Xanthan Gum
(Binding Agent, Emulsion Stabilising, Skin Conditioning, Surfactant Emulsifying Agent, Viscosity Increasing Agent, Binding, Gel Forming, Viscosity Controlling)
2
3
Lecithin
(Skin Conditioning, Emulsifying, Surfactant, Antistatic Agent, Emollient)
3
B
Sodium Hydroxide
(Denaturant, Ph Adjuster, Buffering Agent)
1
A
Ethylhexylglycerin
(Deodorant, Skin Conditioning)
3
A
Potassium Sorbate
(Fragrance, Preservative)
2
Alcohol
(Antifoaming Agent, Antimicrobial, Astringent, Masking, Solvent, Viscosity Controlling)
Bad for Dry Skin
Bad for Dry Skin
Bad for Sensitive Skin
Bad for Sensitive Skin
1
B
Phenethyl Alcohol
(Fragrance, Preservative, Masking)

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

Lavandula Angustifolia Flower Water
Skin Conditioning
Glycerin
Humectant, Skin Protecting
Niacinamide
Skin Conditioning
Panthenol
Skin Conditioning
Acetyl Glucosamine
Skin Conditioning
Gluconolactone
Humectant

Benefits

Good for oily/acne-prone skin

Concerns

Not fungal acne (malassezia) safe
May not suit sensitive skin

Ingredients explained

Lavandula Angustifolia Flower Water
Skin conditioning
Limited public safety data.Read moreShow less
EWG N/A Skin conditioning
Water
Solvent
Low-hazard ingredient.Read moreShow less
EWG 1 Solvent
Dimethyl Sulfone
Solvent, Viscosity decreasing agent
Low-hazard ingredient.Read moreShow less
EWG 1 SolventViscosity decreasing agentViscosity controlling
Niacinamide
Hair conditioning, Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Hair conditioningSkin conditioningSmoothing
Acetyl Glucosamine
Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 Skin conditioning
Leuconostoc/Radish Root Ferment Filtrate
Antidandruff agent, Antimicrobial
Low-hazard ingredient.Read moreShow less
EWG 1 Antidandruff agentAntimicrobial
Gluconolactone
Fragrance, Humectant
Low-hazard ingredient.Read moreShow less
EWG 1 FragranceHumectantSolvent
Avena sativa Kernel Extract
Abrasive, Antioxidant
Limited public safety data.Read moreShow less
EWG N/A AbrasiveAntioxidantSkin conditioningSkin conditioning emollient
Calcium Ketogluconate
Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 Skin conditioning
Betaine
Hair conditioning, Humectant
Low-hazard ingredient.Read moreShow less
EWG 1 CIR B Hair conditioningHumectantAntistatic agentSkin conditioningViscosity controlling
Sodium Gluconate
Chelating agent, Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Chelating agentSkin conditioning
Sodium Chloride
Bulking agent, Masking
Low-hazard ingredient.Read moreShow less
EWG 1 Bulking agentMaskingOral care agentViscosity controlling
Bisabolol
Fragrance, Skin conditioning
Limited public safety data.Read moreShow less
EWG N/A FragranceSkin conditioningSoothing
Aesculus Hippocastanum Seed Extract
Skin conditioning
Limited public safety data.Read moreShow less
EWG N/A Skin conditioning
Butyrospermum Parkii Butter
Skin conditioning, Viscosity controlling
Limited public safety data.Read moreShow less
EWG N/A Skin conditioningViscosity controlling
+ 25 more — see the full ingredients list above
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
Panthenol
Antistatic agent, Hair conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Antistatic agentHair conditioningSkin conditioning Good for Dry Skin
Sodium Hyaluronate
Skin conditioning, Humectant
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Skin conditioningHumectant Good for Dry Skin
Sodium PCA
Hair conditioning, Humectant
Low-hazard ingredient.Read moreShow less
EWG 1 CIR B Hair conditioningHumectantAntistatic agentSkin conditioning Good for Dry Skin
Potassium Chloride
Viscosity increasing agent, Viscosity controlling
Potentially comedogenic - can block poresRead moreShow less
EWG 1 Viscosity increasing agentViscosity controlling Bad for Oily Skin
Citric Acid
Chelating agent, Fragrance
Skin irritation can occur at high concentrationRead moreShow less
EWG 2 CIR A Chelating agentFragrancePh adjusterBuffering agentMasking Bad for Sensitive Skin
Alcohol
Antifoaming agent, Antimicrobial
Causes moisture evaporation - prone to dry out skinRead moreShow less
EWG 2 Antifoaming agentAntimicrobialAstringentMaskingSolventViscosity controlling Bad for Dry SkinBad for Sensitive Skin

How to use

How to use

  • 1 Where it fits: Apply after toner and before moisturiser — thinnest to thickest.
  • 2 Morning & evening: Suitable for both AM and PM use.

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.

Niacinamide 2–5% (up to 10%)

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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