B12 Base Thinner Vitamin Pearl Serum

One/Size by Patrick Starrr

Where to buy Possibly in stock

About this product

The One/Size by Patrick Starrr B12 Base Thinner Vitamin Pearl Serum is a misc. Our analysis of its 31 ingredients (27 low-risk) rates it Excellent (99/100). 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
Misc
Ingredients
31
Low-risk
27
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 8/7
Good for dry skin
Diglycerin Caprylic/Capric Triglyceride Caprylyl Glycol Butylene Glycol Sodium Hyaluronate Glycerin Hydrolyzed Jojoba Esters Dimethicone
Caution for dry skin
Sorbitan Oleate Lycium Barbarum Fruit Extract Glycerin Hydrolyzed Jojoba Esters Acrylates Copolymer Hydrogenated Lecithin Polysorbate 60
Oily/Acne-Prone Skin 1/1
Good for oily/acne-prone skin
Lycium Barbarum Fruit Extract
Caution for oily/acne-prone skin
Hydrolyzed Jojoba Esters
Sensitive Skin 2/9
Good for sensitive skin
Glycerin Dimethicone
Caution for sensitive skin
Dipropylene Glycol Sorbitan Oleate Caprylic/Capric Triglyceride Butylene Glycol Glycerin Tromethamine Sorbic Acid Potassium Sorbate Phenoxyethanol

Ingredients list

31 total
Lower hazard (1) Higher hazard (4)
All31 Skin Conditioning22 Fragrance9 Humectant8 Hair Conditioning7 Solvent6 Masking4 Surfactant4 Emulsifying4
EWG CIR Ingredient Name & Cosmetic Functions Notes
1
Water
(Solvent)
1
A
Dipropylene Glycol
(Fragrance, Solvent, Viscosity Decreasing Agent, Masking, Viscosity Controlling)
3
A
Dimethicone
(Antifoaming Agent, Skin Protecting, Emollient, Skin Conditioning)
Silicone
Silicone
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
Bis-Ethoxydiglycol Cyclohexane 1,4-Dicarboxylate
(Emulsion Stabilising, Hair Conditioning, Humectant, Skin Conditioning, Skin Conditioning Emollient)
1
Diglycerin
(Humectant, Skin Conditioning, Solvent)
2
Mica
(Cosmetic Colorant, Opacifying)
1
Cyanocobalamin
(Skin Conditioning)
1
A
Beta-Glucan
(Bulking Agent, Skin Conditioning)
1
A
Sodium Hyaluronate
(Skin Conditioning, Humectant)
Good for Dry Skin
Good for Dry Skin
1
Ceramide NP
(Hair Conditioning, Skin Conditioning)
1
Lycium Barbarum Fruit Extract
(Astringent, Hair Conditioning, Skin Conditioning)
1
Adenosine
(Skin Conditioning)
3-O-ETHYL ASCORBIC ACID
(Skin Conditioning)
TOCOPHEROL
(Antioxidant, Fragrance, Skin Conditioning)
1
B
Cetearyl Olivate
(Hair Conditioning)
1
A
Hydrolyzed Jojoba Esters
(Emulsion Stabilising, Film Forming, Hair Conditioning, Skin Conditioning Agent Occlusive, Emulsifying, Surfactant, Skin Conditioning)
1
A
Caprylic/Capric Triglyceride
(Emollient, Masking, Perfuming, Skin Conditioning, Solvent)
1
Sodium Phytate
(Chelating Agent, Oral Care Agent)
2
A
Hydrogenated Lecithin
(Skin Conditioning, Emulsifying, Surfactant, Suspending Agent Nonsurfactant)
3
B
Polysorbate 60
(Emulsifying, Surfactant)
Fungal Acne
Fungal Acne Trigger
1
A
Caprylyl Glycol
(Hair Conditioning, Skin Conditioning, Emollient, Humectant)
1
A
Sorbitan Oleate
(Fragrance, Emulsifying, Surfactant)
Bad for Oily Skin
Bad for Oily Skin
Fungal Acne
Fungal Acne Trigger
2
A
Tromethamine
(Fragrance, Ph Adjuster, Buffering Agent, Masking)
1
A
Butylene Glycol
(Fragrance, Skin Conditioning, Solvent, Viscositydecreasing Agent, Humectant, Masking, Viscosity Controlling)
Good for Dry Skin
Good for Dry Skin
2
A
Tin Oxide
(Abrasive, Bulking Agent, Opacifying, Viscosity Controlling)
3
A
Potassium Sorbate
(Fragrance, Preservative)
3
A
Sorbic Acid
(Fragrance, Preservative)
2
B
Acrylates Copolymer
(Adhesive, Artificial Nail Builder, Binding Agent, Film Forming, Hair Fixing, Suspending Agent Nonsurfactant, Antistatic Agent, Binding)
4
A
Phenoxyethanol
(Fragrance, Preservative)
Paraben
Paraben
CI 77891
(Colorant)

My Ingredient Notes

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Key ingredients

Dimethicone
Skin Protecting, Emollient
Glycerin
Humectant, Skin Protecting
Bis-Ethoxydiglycol Cyclohexane 1,4-Dicarboxylate
Humectant, Skin Conditioning
Diglycerin
Humectant, Skin Conditioning
Cyanocobalamin
Skin Conditioning
Beta-Glucan
Skin Conditioning

Benefits

Good for dry skin

Concerns

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

Ingredients explained

Water
Solvent
Low-hazard ingredient.Read moreShow less
EWG 1 Solvent
Dipropylene Glycol
Fragrance, Solvent
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A FragranceSolventViscosity decreasing agentMaskingViscosity controlling
Bis-Ethoxydiglycol Cyclohexane 1,4-Dicarboxylate
Emulsion stabilising, Hair conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 Emulsion stabilisingHair conditioningHumectantSkin conditioningSkin conditioning - emollient
Diglycerin
Humectant, Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 HumectantSkin conditioningSolvent
Mica
Cosmetic colorant, Opacifying
Low-hazard ingredient.Read moreShow less
EWG 2 Cosmetic colorantOpacifying
Cyanocobalamin
Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 Skin conditioning
Beta-Glucan
Bulking agent, Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Bulking agentSkin conditioning
Ceramide NP
Hair conditioning, Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 Hair conditioningSkin conditioning
Lycium Barbarum Fruit Extract
Astringent, Hair conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 AstringentHair conditioningSkin conditioning
Adenosine
Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 Skin conditioning
3-O-ETHYL ASCORBIC ACID
Skin conditioning
Limited public safety data.Read moreShow less
EWG N/A Skin conditioning
TOCOPHEROL
Antioxidant, Fragrance
Limited public safety data.Read moreShow less
EWG N/A AntioxidantFragranceSkin conditioning
Cetearyl Olivate
Hair conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 CIR B Hair conditioning
Hydrolyzed Jojoba Esters
Emulsion stabilising, Film forming
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Emulsion stabilisingFilm formingHair conditioningSkin-conditioning agent -occlusiveEmulsifyingSurfactantSkin conditioning
Caprylic/Capric Triglyceride
Emollient, Masking
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A EmollientMaskingPerfumingSkin conditioningSolvent
+ 9 more — see the full ingredients list above
Dimethicone
Antifoaming agent, Skin protecting
Low-to-moderate hazard.Read moreShow less
EWG 3 CIR A Antifoaming agentSkin protectingEmollientSkin conditioning Silicone
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
Sodium Hyaluronate
Skin conditioning, Humectant
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Skin conditioningHumectant Good for Dry Skin
Polysorbate 60
Emulsifying, Surfactant
Low-to-moderate hazard.Read moreShow less
EWG 3 CIR B EmulsifyingSurfactant Fungal-acne trigger
Sorbitan Oleate
Fragrance, Emulsifying
Potentially comedogenic - can block poresRead moreShow less
EWG 1 CIR A FragranceEmulsifyingSurfactant Bad for Oily SkinFungal-acne trigger
Butylene Glycol
Fragrance, Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A FragranceSkin conditioningSolventViscositydecreasing agentHumectantMaskingViscosity controlling Good for Dry Skin
Phenoxyethanol
Fragrance, Preservative
Low-to-moderate hazard.Read moreShow less
EWG 4 CIR A FragrancePreservative Paraben

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.

3-O-ETHYL ASCORBIC 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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