Microbioma Hydrating Serum

RVB LAB

Where to buy Possibly in stock

About this product

The RVB LAB Microbioma Hydrating Serum is a serums, essence, ampoule. Our analysis of its 33 ingredients (25 low-risk) rates it Excellent (100/100). 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
33
Low-risk
25
Fragrance
Contains fragrance
Origin
Italy

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 12/4
Good for dry skin
Diethylhexyl Carbonate Arachidyl Propionate Ethyl Linolenate Ethyl Linoleate Ethyl Oleate Octyldodecanol Caprylic/Capric Triglyceride Caprylyl Glycol Sodium Hyaluronate Sodium Polyglutamate Lecithin Acetyl Heptapeptide-4
Caution for dry skin
Maltodextrin Alpha-Glucan Oligosaccharide Polyglyceryl-4 Diisostearate/Polyhydroxystearate/Sebacate Lecithin
Oily/Acne-Prone Skin No data
Sensitive Skin 3/7
Good for sensitive skin
Ascorbyl Palmitate Tocopheryl Acetate Orobanche Rapum Extract
Caution for sensitive skin
Ascorbyl Palmitate Ethyl Linolenate Ethyl Linoleate Ethyl Oleate Octyldodecanol Caprylic/Capric Triglyceride Citric Acid

Ingredients list

33 total
Lower hazard (1) Higher hazard (3)
All33 Skin Conditioning34 Emollient9 Fragrance7 Hair Conditioning6 Solvent5 Perfuming5 Humectant4 Masking3
EWG CIR Ingredient Name & Cosmetic Functions Notes
1
Water
(Solvent)
1
Diethylhexyl Carbonate
(Skin Conditioning, Emollient)
1
A
Caprylic/Capric Triglyceride
(Emollient, Masking, Perfuming, Skin Conditioning, Solvent)
1
Polyglyceryl-4 Diisostearate/Polyhydroxystearate/Sebacate
(Emulsifying, Emulsion Stabilising, Surfactant)
1
A
Magnesium Sulfate
(Bulking Agent, Hair Conditioning, Viscosity Controlling)
1
Acetyl Glucosamine
(Skin Conditioning)
1
A
Sodium Hyaluronate
(Skin Conditioning, Humectant)
Good for Dry Skin
Good for Dry Skin
Hydrolyzed Sodium Hyaluronate
(Skin Conditioning)
1
Sodium Polyglutamate
(Hair Conditioning, Skin Conditioning, Humectant)
1
Alpha-Glucan Oligosaccharide
(Cleansing, Skin Conditioning, Smoothing)
Lactobacillus
(Skin Conditioning)
Orobanche Rapum Extract
(Skin Protecting)
1
Polymnia Sonchifolia Root Juice
(Skin Conditioning)
2
3
Lecithin
(Skin Conditioning, Emulsifying, Surfactant, Antistatic Agent, Emollient)
1
A
Maltodextrin
(Absorbent, Binding Agent, Emulsion Stabilising, Film Forming, Hair Conditioning, Skin Conditioning, Suspending Agent Nonsurfactant, Binding)
3
Tocopheryl Acetate
(Antioxidant, Skin Conditioning)
Bad for Oily Skin
Bad for Oily Skin
SIMMONDSIA CHINENSIS SEED OIL
(Hair Conditioning, Skin Conditioning, Skin Conditioning Emollient)
1
Propanediol
(Solvent, Viscosity Decreasing Agent, Viscosity Controlling)
1
A
Caprylyl Glycol
(Hair Conditioning, Skin Conditioning, Emollient, Humectant)
1
B
Arachidyl Propionate
(Skin Conditioning, Emollient)
1
Ethyl Linolenate
(Fragrance, Skin Conditioning, Emollient)
1
Ethyl Linoleate
(Fragrance, Skin Conditioning, Emollient, Perfuming)
Fungal Acne
Fungal Acne Trigger
1
Ethyl Oleate
(Fragrance, Hair Conditioning, Skin Conditioning, Emollient, Perfuming)
Fungal Acne
Fungal Acne Trigger
1
A
Octyldodecanol
(Fragrance, Skin Conditioning, Emollient, Perfuming, Solvent)
1
A
Sodium Gluconate
(Chelating Agent, Skin Conditioning)
PARFUM
(Fragrance, Perfuming)
Acetyl Heptapeptide-4
(Humectant, Skin Conditioning)
TOCOPHEROL
(Antioxidant, Fragrance, Skin Conditioning)
1
A
1,2-Hexanediol
(Solvent)
1
Tropolone
(Skin Conditioning)
1
A
Ascorbyl Palmitate
(Antioxidant, Masking)
Fungal Acne
Fungal Acne Trigger
Retinyl Palmitate
(Skin Conditioning, Skin Conditioning Miscellaneous)
2
A
Citric Acid
(Chelating Agent, Fragrance, Ph Adjuster, Buffering Agent, Masking)
Bad for Sensitive Skin
Bad for Sensitive Skin

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

Diethylhexyl Carbonate
Skin Conditioning, Emollient
Caprylic/Capric Triglyceride
Emollient, Skin Conditioning
Acetyl Glucosamine
Skin Conditioning
Sodium Hyaluronate
Skin Conditioning, Humectant
Hydrolyzed Sodium Hyaluronate
Skin Conditioning
Sodium Polyglutamate
Skin Conditioning, Humectant

Benefits

Good for dry skin

Concerns

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

Ingredients explained

Water
Solvent
Low-hazard ingredient.Read moreShow less
EWG 1 Solvent
Diethylhexyl Carbonate
Skin conditioning, Emollient
Low-hazard ingredient.Read moreShow less
EWG 1 Skin conditioningEmollient
Caprylic/Capric Triglyceride
Emollient, Masking
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A EmollientMaskingPerfumingSkin conditioningSolvent
Polyglyceryl-4 Diisostearate/Polyhydroxystearate/Sebacate
Emulsifying, Emulsion stabilising
Low-hazard ingredient.Read moreShow less
EWG 1 EmulsifyingEmulsion stabilisingSurfactant
Magnesium Sulfate
Bulking agent, Hair conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Bulking agentHair conditioningViscosity controlling
Acetyl Glucosamine
Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 Skin conditioning
Hydrolyzed Sodium Hyaluronate
Skin conditioning
Limited public safety data.Read moreShow less
EWG N/A Skin conditioning
Sodium Polyglutamate
Hair conditioning, Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 Hair conditioningSkin conditioningHumectant
Alpha-Glucan Oligosaccharide
Cleansing, Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 CleansingSkin conditioningSmoothing
Lactobacillus
Skin conditioning
Limited public safety data.Read moreShow less
EWG N/A Skin conditioning
Orobanche Rapum Extract
Skin protecting
Limited public safety data.Read moreShow less
EWG N/A Skin protecting
Polymnia Sonchifolia Root Juice
Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 Skin conditioning
Lecithin
Skin conditioning, Emulsifying
Low-to-moderate hazard.Read moreShow less
EWG 2–3 Skin conditioningEmulsifyingSurfactantAntistatic agentEmollient
Maltodextrin
Absorbent, Binding agent
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A AbsorbentBinding agentEmulsion stabilisingFilm formingHair conditioningSkin conditioningSuspending agent - nonsurfactantBinding
SIMMONDSIA CHINENSIS SEED OIL
Hair conditioning, Skin conditioning
Limited public safety data.Read moreShow less
EWG N/A Hair conditioningSkin conditioningSkin conditioning emollient
+ 12 more — see the full ingredients list above
Sodium Hyaluronate
Skin conditioning, Humectant
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Skin conditioningHumectant Good for Dry Skin
Tocopheryl Acetate
Antioxidant, Skin conditioning
Potentially comedogenic - can block poresRead moreShow less
EWG 3 AntioxidantSkin conditioning Bad for Oily Skin
Ethyl Linoleate
Fragrance, Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 FragranceSkin conditioningEmollientPerfuming Fungal-acne trigger
Ethyl Oleate
Fragrance, Hair conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 FragranceHair conditioningSkin conditioningEmollientPerfuming Fungal-acne trigger
Ascorbyl Palmitate
Antioxidant, Masking
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A AntioxidantMasking Fungal-acne trigger
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

How to use

How to use

  • 1 Where it fits: Apply after toner and before moisturiser — thinnest to thickest.
  • 2 Evening: Use at night — start 2–3× a week and build up as your skin tolerates it.
  • 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.

Ascorbyl Palmitate

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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