PDRN Rice & Green Tea Revitalizing Serum

Knours

PDRN Rice & Green Tea Revitalizing Serum

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About this product

The Knours PDRN Rice & Green Tea Revitalizing Serum is a serums, essence, ampoule. Our analysis of its 67 ingredients (47 low-risk) rates it Excellent (100/100). Based on its ingredients, it looks well-suited to oily / acne-prone and dry skin.

Reef-safe

Summarised from our ingredient analysis — not brand marketing copy.

At a glance

Type
Serums, Essence, Ampoules
Ingredients
67
Low-risk
47
Fragrance
Fragrance-free
Origin
United States

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 18/11
Good for dry skin
Linolenic Acid Linoleic Acid Sodium Acetylated Hyaluronate Sodium Hyaluronate Crosspolymer Soluble Collagen Sucrose Palmitate Salvia Hispanica Seed Extract Caprylic/Capric Triglyceride Butylene Glycol Sodium Hyaluronate Glycerin Hydroxypropyltrimonium Hyaluronate Hydrolyzed Hyaluronic Acid Hyaluronic Acid Hordeum Vulgare Extract Camellia Sinensis Leaf Extract Sodium Polyacrylate Cannabis Sativa Seed Extract
Caution for dry skin
Linolenic Acid Linoleic Acid Sodium Stearoyl Glutamate Sucrose Palmitate Inulin Lauryl Carbamate Glycerin Hydrogenated Lecithin Camellia Sinensis Leaf Extract Sodium Polyacrylate PEG-60 Hydrogenated Castor Oil Sodium Surfactin
Oily/Acne-Prone Skin 1/0
Good for oily/acne-prone skin
Camellia Sinensis Leaf Extract
Sensitive Skin 4/9
Good for sensitive skin
Malt Extract Glycerin Camellia Sinensis Leaf Water Camellia Sinensis Leaf Extract
Caution for sensitive skin
Linolenic Acid Linoleic Acid Arginine Caprylic/Capric Triglyceride Butylene Glycol Glycerin Camellia Sinensis Leaf Water Camellia Sinensis Leaf Extract PEG-60 Hydrogenated Castor Oil

Ingredients list

67 total
Lower hazard (1) Higher hazard (3)
All67 Skin Conditioning65 Hair Conditioning16 Humectant11 Solvent9 Fragrance9 Emollient8 Antistatic Agent8 Skin Protecting7
EWG CIR Ingredient Name & Cosmetic Functions Notes
Rice Ferment Filtrate
(Skin Conditioning)
1
Water
(Solvent)
1
A
1,2-Hexanediol
(Solvent)
1
A
Butylene Glycol
(Fragrance, Skin Conditioning, Solvent, Viscositydecreasing Agent, Humectant, Masking, Viscosity Controlling)
Good for Dry Skin
Good for Dry Skin
1
Isopentyldiol
(Solvent)
1
A
Niacinamide
(Hair Conditioning, Skin Conditioning, Smoothing)
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
Oryza Sativa Bran Water
(Fragrance, Perfuming)
Saccharomyces/Rice Ferment Filtrate
(Skin Conditioning)
1
Methylpropanediol
(Solvent)
1
B
Camellia Sinensis Leaf Water
(Masking, Perfuming, Tonic)
Good for Oily Skin
Good for Oily Skin
1
A
Sodium Hyaluronate
(Skin Conditioning, Humectant)
Good for Dry Skin
Good for Dry Skin
1
A
Pentylene Glycol
(Skin Conditioning, Solvent)
1
Hydrolyzed Hyaluronic Acid
(Hair Conditioning, Humectant, Skin Conditioning)
1
A
Hyaluronic Acid
(Skin Conditioning, Viscosity Increasing Agent, Antistatic Agent, Humectant, Moisturising)
1
A
Caprylic/Capric Triglyceride
(Emollient, Masking, Perfuming, Skin Conditioning, Solvent)
3
B
PEG-60 Hydrogenated Castor Oil
(Fragrance, Sufactant, Surfactant)
Fungal Acne
Fungal Acne Trigger
1
A
Carbomer
(Emulsion Stabilising, Viscosity Increasing Agent, Gel Forming, Viscosity Controlling)
1
A
Panthenol
(Antistatic Agent, Hair Conditioning, Skin Conditioning)
Good for Dry Skin
Good for Dry Skin
1
Inulin Lauryl Carbamate
(Emulsion Stabilising, Surfactant)
1
A
Arginine
(Fragrance, Hair Conditioning, Skin Conditioning, Antistatic Agent, Masking)
2
A
Hydrogenated Lecithin
(Skin Conditioning, Emulsifying, Surfactant, Suspending Agent Nonsurfactant)
1
Polyglutamic Acid
(Skin Conditioning)
3
B
Sodium Polyacrylate
(Absorbent, Emulsion Stabilising, Film Forming, Hair Fixing, Skin Conditioning Agent Emollient, Viscosity Controlling Agent, Viscosity Increasing Agent, Binding, Skin Conditioning)
1
Adenosine
(Skin Conditioning)
1
Propanediol
(Solvent, Viscosity Decreasing Agent, Viscosity Controlling)
ELAEIS GUINEENSIS OIL
(Skin Conditioning Emollient)
1
A
Disodium EDTA
(Chelating Agent, Viscosity Controlling)
1
Zanthoxylum Piperitum Fruit Extract
(Skin Conditioning)
Usnea Barbata Extract
(Deodorant)
1
Pulsatilla Koreana Extract
(Skin Conditioning)
1
Malt Extract
(Skin Conditioning, Skin Protecting, Tonic)
2
A
Hydrolyzed Rice Bran Protein
(Antistatic Agent, Hair Conditioning, Skin Conditioning)
1
A
Hydrolyzed Rice Protein
(Hair Conditioning, Skin Conditioning, Antistatic Agent)
1
B
Polyglyceryl-4 Oleate
(Emulsifying)
Kummerowia Striata Extract
(Skin Conditioning)
Oryza Sativa Germ Extract
(Skin Conditioning Emollient)
Oryza sativa extract
(Abrasive, Absorbent, Bulking, Hair Conditioning, Skin Conditioning)
Oryza Sativa Bran Extract
(Skin Conditioning, Skin Protecting)
1
Ceramide NP
(Hair Conditioning, Skin Conditioning)
Cinchona Pubescens Bark Extract
(Skin Conditioning)
1
A
Rice Amino Acids
(Hair Conditioning, Skin Conditioning)
1
A
Ethylhexylglycerin
(Deodorant, Skin Conditioning)
Vigna Angularis Seed Extract
(Skin Protecting)
1
Hordeum Vulgare Extract
(Emollient, Skin Conditioning)
Glycine Max Seed Extract
(Hair Conditioning, Skin Conditioning, Skin Protecting)
Avena sativa Kernel Extract
(Abrasive, Antioxidant, Skin Conditioning, Skin Conditioning Emollient)
1
Sucrose Palmitate
(Skin Conditioning, Emollient, Emulsifying, Surfactant)
Cannabis Sativa Seed Extract
(Emollient)
TOCOPHEROL
(Antioxidant, Fragrance, Skin Conditioning)
1
Soluble Collagen
(Hair Conditioning, Skin Conditioning, Antistatic Agent, Film Forming, Humectant)
1
B
Sodium Stearoyl Glutamate
(Hair Conditioning, Skin Conditioning, Surfactant Cleansingagent, Emulsifying)
Leptospermum Scoparium Leaf Extract
(Skin Conditioning)
1
Hydroxypropyltrimonium Hyaluronate
(Film Forming, Humectant)
1
Linoleic Acid
(Fragrance, Hair Conditioning, Skin Conditioning, Sufactantsurfactant Cleansing Agent Is Included As A Function For The Soap Form Of Linoleic Acid., Antistatic Agent, Emollient)
Fungal Acne
Fungal Acne Trigger
Retinyl Palmitate
(Skin Conditioning, Skin Conditioning Miscellaneous)
Sodium Surfactin
(Cleansing, Emulsifying, Gel Forming, Surfactant)
1
Linolenic Acid
(Fragrance, Hair Conditioning, Skin Conditioning, Sufactantsurfactant Cleansing Agent Is Included As A Function For The Soap Form Of Linolenic Acid., Antistatic Agent, Emollient, Perfuming)
Fungal Acne
Fungal Acne Trigger
1
Sodium Acetylated Hyaluronate
(Humectant)
1
Salvia Hispanica Seed Extract
(Emollient, Skin Conditioning)
1
A
Biotin
(Hair Conditioning, Skin Conditioning, Antiseborrhoeic)
1
Sodium DNA
(Skin Conditioning)
1
B
Camellia Sinensis Leaf Extract
(Antimicrobial, Antioxidant, Astringent, Emollient, Humectant, Masking, Oral Care Agent, Skin Conditioning, Skin Protecting, Tonic, Uv Absorber)
Good for Oily Skin
Good for Oily Skin
1
Sodium Hyaluronate Crosspolymer
(Humectant, Skin Conditioning)
Hydrolyzed Sodium Hyaluronate
(Skin Conditioning)
1
Potassium Hyaluronate
(Skin Conditioning)
ASCORBIC ACID
(Antioxidant, Buffering, Fragrance, Skin Conditioning)

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

Hyaluronic Acid
Hydrates by attracting and holding water.
Antioxidants
Shields skin from free radical damage.
Retinoid
Visibly reduces the signs of aging.
Vitamin C
Brightens, evens tone, and supports collagen.
Vitamin E
Protects skin and soothes irritation.
Niacinamide
Strengthens, smooths, and brightens skin.
Ceramides
Locks in moisture and supports skin barrier.
Exfoliators
Removes dead skin cells to smoothe texture.

Benefits

HydratingBoosts hydration and relieves dry, tight skin.
Barrier RepairStrengthen and restore your skin's natural barrier.
Anti-AgingSoftens lines and helps skin look youthful.
Scar HealingImproves the look of marks and scars.
Reduces IrritationEases discomfort and supports skin resilience.
Redness ReducingSoothes visible redness and calms irritation.
Dark SpotsFades dark spots for even skin tone.
BrighteningRestores radiance to dull, tired skin.

Concerns

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

Ingredients explained

Rice Ferment Filtrate
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
1,2-Hexanediol
Solvent
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Solvent
Isopentyldiol
Solvent
Low-hazard ingredient.Read moreShow less
EWG 1 Solvent
Niacinamide
Hair conditioning, Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Hair conditioningSkin conditioningSmoothing
Oryza Sativa Bran Water
Fragrance, Perfuming
Limited public safety data.Read moreShow less
EWG N/A FragrancePerfuming
Saccharomyces/Rice Ferment Filtrate
Skin conditioning
Limited public safety data.Read moreShow less
EWG N/A Skin conditioning
Methylpropanediol
Solvent
Low-hazard ingredient.Read moreShow less
EWG 1 Solvent
Pentylene Glycol
Skin conditioning, Solvent
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Skin conditioningSolvent
Hydrolyzed Hyaluronic Acid
Hair conditioning, Humectant
Low-hazard ingredient.Read moreShow less
EWG 1 Hair conditioningHumectantSkin conditioning
Hyaluronic Acid
Skin conditioning, Viscosity increasing agent
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Skin conditioningViscosity increasing agentAntistatic agentHumectantMoisturising
Caprylic/Capric Triglyceride
Emollient, Masking
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A EmollientMaskingPerfumingSkin conditioningSolvent
Carbomer
Emulsion stabilising, Viscosity increasing agent
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Emulsion stabilisingViscosity increasing agentGel formingViscosity controlling
Inulin Lauryl Carbamate
Emulsion stabilising, Surfactant
Low-hazard ingredient.Read moreShow less
EWG 1 Emulsion stabilisingSurfactant
Arginine
Fragrance, Hair conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A FragranceHair conditioningSkin conditioningAntistatic agentMasking
+ 43 more — see the full ingredients list above
Butylene Glycol
Fragrance, Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A FragranceSkin conditioningSolventViscositydecreasing agentHumectantMaskingViscosity controlling Good for Dry Skin
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
Camellia Sinensis Leaf Water
Masking, Perfuming
Low-hazard ingredient.Read moreShow less
EWG 1 CIR B MaskingPerfumingTonic Good for Oily Skin
Sodium Hyaluronate
Skin conditioning, Humectant
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Skin conditioningHumectant Good for Dry Skin
PEG-60 Hydrogenated Castor Oil
Fragrance, Sufactant
Low-to-moderate hazard.Read moreShow less
EWG 3 CIR B FragranceSufactantSurfactant Fungal-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
Linoleic Acid
Fragrance, Hair conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 FragranceHair conditioningSkin conditioningSufactantsurfactant-cleansing agent is included as a function for the soap form of linoleic acid.Antistatic agentEmollient Fungal-acne trigger
Linolenic Acid
Fragrance, Hair conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 FragranceHair conditioningSkin conditioningSufactantsurfactant-cleansing agent is included as a function for the soap form of linolenic acid.Antistatic agentEmollientPerfuming Fungal-acne trigger
Camellia Sinensis Leaf Extract
Antimicrobial, Antioxidant
Low-hazard ingredient.Read moreShow less
EWG 1 CIR B AntimicrobialAntioxidantAstringentEmollientHumectantMaskingOral care agentSkin conditioningSkin protectingTonicUv absorber Good for Oily Skin

How to use

How to use

  • 1 Where it fits: Apply after toner and before moisturiser — thinnest to thickest.
  • 2 Morning only: Apply as the last step of your AM routine, after moisturiser, and reapply every ~2 hours of sun exposure.
  • 3 Wear SPF the next day: Acids and retinoids increase sun sensitivity — daily sunscreen is a must while using this.

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

Trust & honesty

Pregnancy & breastfeeding

Contains ingredients some choose to avoid or double-check while pregnant or nursing.

Often avoided
Retinoids (Vitamin A) (Retinyl Palmitate)

Topical retinoids (retinol, retinaldehyde, retinyl esters) are widely advised against in pregnancy as a precaution. The strongest evidence is for ORAL retinoids; topical absorption is low, but most clinicians err on the side of caution.

This is general information, not medical advice. Pregnancy guidance varies and depends on concentration and your individual situation — always check with your doctor, midwife or pharmacist. How we flag this.

Effective levels — general guide

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

Retinoids (Vitamin A) 0.01–1%

Most studied between 0.1% and 1%. Higher is not automatically better — irritation climbs with dose, so a well-formulated lower strength is often the sweet spot.

Retinyl Palmitate

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.

ASCORBIC ACID

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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