Beauty Molecules B5 Protective Ultra-Light Serum SPF 50

Bielenda

Beauty Molecules B5 Protective Ultra-Light Serum SPF 50

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About this product

The Bielenda Beauty Molecules B5 Protective Ultra-Light Serum SPF 50 is a serums, essence, ampoule. Our analysis of its 51 ingredients (38 low-risk) rates it Excellent (95/100). Based on its ingredients, it looks well-suited to dry skin. 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
Serums, Essence, Ampoules
Ingredients
51
Low-risk
38
Fragrance
Contains fragrance
Origin
Poland
SPF
50 · blocks 98.0% UVB
Data updated
Jun 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 14/10
Good for dry skin
C12-15 Alkyl Benzoate Glyceryl Stearate Cetearyl Alcohol Squalene Ectoin Isodecyl Neopentanoate Butylene Glycol Sodium Hyaluronate Glycerin Propylene Glycol Coconut Alkanes Dibutyl Adipate Dimethicone Lactic Acid
Caution for dry skin
C12-20 Alkyl Glucoside Decyl Glucoside Microcrystalline Cellulose Maltodextrin Stearic Acid Alpha-Glucan Oligosaccharide Xanthan Gum Glycerin Potassium Cetyl Phosphate Alumina
Oily/Acne-Prone Skin No data
Sensitive Skin 3/14
Good for sensitive skin
Alpha-Arbutin Glycerin Dimethicone
Caution for sensitive skin
Disodium Phosphate Beta-Sitosterol Cellulose Gum Stearic Acid Butylene Glycol Glycerin Propylene Glycol Citric Acid Lactic Acid Phenoxyethanol Linalool Benzyl Alcohol Hexyl Cinnamal Limonene

Ingredients list

51 total
Lower hazard (1) Higher hazard (6)
All51 Skin Conditioning37 Emulsion Stabilising14 Fragrance14 Solvent9 Emollient9 Masking9 Viscosity Controlling7 Humectant7
EWG CIR Ingredient Name & Cosmetic Functions Notes
1
Water
(Solvent)
1
A
C12-15 Alkyl Benzoate
(Skin Conditioning, Emollient, Antimicrobial)
1
A
Dibutyl Adipate
(Plasticizer, Skin Conditioning, Emollient, Solvent, Film Forming)
2
Diethylamino Hydroxybenzoyl Hexyl Benzoate
(Uv Absorber, Uv Filter)
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
Tris-Biphenyl Triazine
(Light Stabilizer, Uv Absorber, Uv Filter)
Methylene Bis-Benzotriazolyl Tetramethylbutylphenol
(Uv Filter)
1
Coconut Alkanes
(Emollient, Solvent)
1
3
Titanium/Titanium Dioxide
(Cosmetic Colorant, Opacifying)
1
C14-22 Alcohols
(Emulsion Stabilising)
1
Ethylhexyl Triazone
(Uv Absorber, Uv Filter)
1
B
Isodecyl Neopentanoate
(Skin Conditioning, Emollient)
Prunus Amygdalus Dulcis Oil
(Skin Conditioning)
1
Alpha-Arbutin
(Antioxidant, Skin Conditioning)
1
Ectoin
(Buffering Agent, Skin Conditioning, Emollient)
1
A
Panthenol
(Antistatic Agent, Hair Conditioning, Skin Conditioning)
Good for Dry Skin
Good for Dry Skin
1
Alpha-Glucan Oligosaccharide
(Cleansing, Skin Conditioning, Smoothing)
1
A
Sodium Hyaluronate
(Skin Conditioning, Humectant)
Good for Dry Skin
Good for Dry Skin
1
A
Butylene Glycol
(Fragrance, Skin Conditioning, Solvent, Viscositydecreasing Agent, Humectant, Masking, Viscosity Controlling)
Good for Dry Skin
Good for Dry Skin
1
Polymnia Sonchifolia Root Juice
(Skin Conditioning)
1
A
Maltodextrin
(Absorbent, Binding Agent, Emulsion Stabilising, Film Forming, Hair Conditioning, Skin Conditioning, Suspending Agent Nonsurfactant, Binding)
1
A
Hydrolyzed Rice Protein
(Hair Conditioning, Skin Conditioning, Antistatic Agent)
1
A
Beta-Sitosterol
(Emulsion Stabilising, Masking, Skin Conditioning, Stabilising)
Lactobacillus
(Skin Conditioning)
3
B
Propylene Glycol
(Fragrance, Humectant, Skin Conditioningagent Miscellaneous, Solvent, Viscosity Decreasing Agent, Skin Conditioning, Viscosity Controlling)
Good for Dry Skin
Good for Dry Skin
1
A
Pentylene Glycol
(Skin Conditioning, Solvent)
3
A
Dimethicone
(Antifoaming Agent, Skin Protecting, Emollient, Skin Conditioning)
Silicone
Silicone
1
A
Ethylhexylglycerin
(Deodorant, Skin Conditioning)
Glycine Soja Oil
(Perfuming, Skin Conditioning, Skin Conditioning Emollient)
1
A
Squalene
(Hair Conditioning, Skin Conditioning, Emollient, Antistatic Agent, Refatting)
Fungal Acne
Fungal Acne Trigger
1
B
Decyl Glucoside
(Cleansing, Emulsion Stabilising, Surfactant)
1
B
C12-20 Alkyl Glucoside
(Emulsifying, Surfactant)
1
B
Potassium Cetyl Phosphate
(Emulsifying, Surfactant)
1
A
Cetearyl Alcohol
(Emulsion Stabilising, Opacifying, Foam Boosting, Viscosity Increasingagent Aqueous, Viscosity Increasing Agent, Emollient, Emulsifying, Viscosity Controlling)
1
A
Glyceryl Stearate
(Emollient, Emulsifying)
Fungal Acne
Fungal Acne Trigger
1
A
Xanthan Gum
(Binding Agent, Emulsion Stabilising, Skin Conditioning, Surfactant Emulsifying Agent, Viscosity Increasing Agent, Binding, Gel Forming, Viscosity Controlling)
1
A
Microcrystalline Cellulose
(Abrasive, Absorbent, Anticaking Agent, Bulking Agent, Emulsion Stabilising, Slip Modifier, Viscosity Increasing Agent)
1
A
Stearic Acid
(Fragrance, Sufactant, Emulsifying, Surfactantsurfactant Cleansing Agent Is Included As A Function For The Soap Form Of Stearic Acid., Emulsion Stabilising, Masking, Refatting)
Bad for Oily Skin
Bad for Oily Skin
Fungal Acne
Fungal Acne Trigger
2
A
Alumina
(Abrasive, Absorbent, Anticaking Agent, Bulking Agent, Opacifying, Viscosity Controlling)
4
B
Lactic Acid
(Exfoliant, Fragrance, Humectant, Ph Adjuster, Skin Conditioning Agent Humectant, Skin Conditioning, Buffering Agent)
Bad for Sensitive Skin
Bad for Sensitive Skin
1
A
Disodium EDTA
(Chelating Agent, Viscosity Controlling)
1
B
Disodium Phosphate
(Buffering Agent, Anticorrosive, Fragrance, Ph Adjuster, Masking)
1
A
Cellulose Gum
(Binding Agent, Emulsion Stabilising, Film Forming, Fragrance, Viscosity Increasing Agent, Binding, Masking, Viscosity Controlling)
TOCOPHEROL
(Antioxidant, Fragrance, Skin Conditioning)
2
A
Citric Acid
(Chelating Agent, Fragrance, Ph Adjuster, Buffering Agent, Masking)
Bad for Sensitive Skin
Bad for Sensitive Skin
4
A
Phenoxyethanol
(Fragrance, Preservative)
Paraben
Paraben
5
A
Benzyl Alcohol
(External Analgesic, Fragrance, Oral Health Care Drug, Preservative, Solvent, Viscosity Decreasing Agent, Masking)
Allergens
Allergens
PARFUM
(Fragrance, Perfuming)
6
Limonene
(Deodorant, Perfuming, Solvent)
Allergens
Allergens
5
Linalool
(Fragrance, Deodorant, Masking)
Allergens
Allergens
5
Hexyl Cinnamal
(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

Chemical UV Filter
Absorbs UV rays to help prevent sun damage.
Antioxidants
Shields skin from free radical damage.
Vitamin E
Protects skin and soothes irritation.
Hyaluronic Acid
Hydrates by attracting and holding water.
Arbutin
Gently brightens and evens skin tone.
Ectoin
Protects against environmental stress and aging.
Mineral UV Filter
Reflects UV rays using mineral barriers.
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.
Scar HealingImproves the look of marks and scars.
Redness ReducingSoothes visible redness and calms irritation.
Anti-AgingSoftens lines and helps skin look youthful.
Reduces IrritationEases discomfort and supports skin resilience.
Dark SpotsFades dark spots for even skin tone.
BrighteningRestores radiance to dull, tired skin.

Concerns

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

Ingredients explained

Water
Solvent
Low-hazard ingredient.Read moreShow less
EWG 1 Solvent
C12-15 Alkyl Benzoate
Skin conditioning, Emollient
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Skin conditioningEmollientAntimicrobial
Dibutyl Adipate
Plasticizer, Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A PlasticizerSkin conditioningEmollientSolventFilm forming
Diethylamino Hydroxybenzoyl Hexyl Benzoate
Uv absorber, Uv filter
Low-hazard ingredient.Read moreShow less
EWG 2 Uv absorberUv filter
Tris-Biphenyl Triazine
Light stabilizer, Uv absorber
Limited public safety data.Read moreShow less
EWG N/A Light stabilizerUv absorberUv filter
Methylene Bis-Benzotriazolyl Tetramethylbutylphenol
Uv filter
Limited public safety data.Read moreShow less
EWG N/A Uv filter
Coconut Alkanes
Emollient, Solvent
Low-hazard ingredient.Read moreShow less
EWG 1 EmollientSolvent
Titanium/Titanium Dioxide
Cosmetic colorant, Opacifying
Low-to-moderate hazard.Read moreShow less
EWG 1–3 Cosmetic colorantOpacifying
C14-22 Alcohols
Emulsion stabilising
Low-hazard ingredient.Read moreShow less
EWG 1 Emulsion stabilising
Ethylhexyl Triazone
Uv absorber, Uv filter
Low-hazard ingredient.Read moreShow less
EWG 1 Uv absorberUv filter
Isodecyl Neopentanoate
Skin conditioning, Emollient
Low-hazard ingredient.Read moreShow less
EWG 1 CIR B Skin conditioningEmollient
Prunus Amygdalus Dulcis Oil
Skin conditioning
Limited public safety data.Read moreShow less
EWG N/A Skin conditioning
Alpha-Arbutin
Antioxidant, Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 AntioxidantSkin conditioning
Ectoin
Buffering agent, Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 Buffering agentSkin conditioningEmollient
Alpha-Glucan Oligosaccharide
Cleansing, Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 CleansingSkin conditioningSmoothing
+ 20 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
Butylene Glycol
Fragrance, Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A FragranceSkin conditioningSolventViscositydecreasing agentHumectantMaskingViscosity controlling Good for Dry Skin
Propylene Glycol
Fragrance, Humectant
Low-to-moderate hazard.Read moreShow less
EWG 3 CIR B FragranceHumectantSkin-conditioningagent - miscellaneousSolventViscosity decreasing agentSkin conditioningViscosity controlling Good for Dry Skin
Dimethicone
Antifoaming agent, Skin protecting
Low-to-moderate hazard.Read moreShow less
EWG 3 CIR A Antifoaming agentSkin protectingEmollientSkin conditioning Silicone
Squalene
Hair conditioning, Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Hair conditioningSkin conditioningEmollientAntistatic agentRefatting Fungal-acne trigger
Glyceryl Stearate
Emollient, Emulsifying
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A EmollientEmulsifying Fungal-acne trigger
Stearic Acid
Fragrance, Sufactant
Potentially comedogenic - can block poresRead moreShow less
EWG 1 CIR A FragranceSufactantEmulsifyingSurfactantsurfactant-cleansing agent is included as a function for the soap form of stearic acid.Emulsion stabilisingMaskingRefatting Bad for Oily SkinFungal-acne trigger
Lactic Acid
Exfoliant, Fragrance
Skin irritation can occur at high concentrationRead moreShow less
EWG 4 CIR B ExfoliantFragranceHumectantPh adjusterSkin-conditioning agent -humectantSkin conditioningBuffering agent Bad for Sensitive 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
Phenoxyethanol
Fragrance, Preservative
Low-to-moderate hazard.Read moreShow less
EWG 4 CIR A FragrancePreservative Paraben
Benzyl Alcohol
External analgesic, Fragrance
Moderate-hazard ingredient.Read moreShow less
EWG 5 CIR A External analgesicFragranceOral health care drugPreservativeSolventViscosity decreasing agentMasking Allergens
Limonene
Deodorant, Perfuming
Moderate-hazard ingredient.Read moreShow less
EWG 6 DeodorantPerfumingSolvent Allergens
Linalool
Fragrance, Deodorant
Moderate-hazard ingredient.Read moreShow less
EWG 5 FragranceDeodorantMasking Allergens
+ 1 more — see the full ingredients list above

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

Effective levels — general guide

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

AHA (acid exfoliant) 5–10% (OTC)

OTC leave-on AHAs are usually 5–10%. The effect also depends on pH and free-acid value, not the percentage alone.

Lactic 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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