Serum 01: 6.5% High Dose Retinoid

Same Skincare

Where to buy Possibly in stock

About this product

The Same Skincare Serum 01: 6.5% High Dose Retinoid is a serums, essence, ampoule. Our analysis of its 27 ingredients (15 low-risk) rates it Excellent (93/100). Based on its ingredients, it looks well-suited to oily / acne-prone skin. Heads up: it contains fragrance, which can irritate sensitive or reactive skin.

Reef-safe

Summarised from our ingredient analysis — not brand marketing copy.

At a glance

Type
Serums, Essence, Ampoules
Ingredients
27
Low-risk
15
Fragrance
Contains fragrance
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 4/5
Good for dry skin
Honey Sodium Hyaluronate Glycerin Camellia Sinensis Leaf Extract
Caution for dry skin
Glycerin Camellia Sinensis Leaf Extract Sodium Hydroxide Polysorbate 20 PEG-40 Hydrogenated Castor Oil
Oily/Acne-Prone Skin 2/0
Good for oily/acne-prone skin
Camellia Sinensis Leaf Extract Retinol
Sensitive Skin 6/7
Good for sensitive skin
Spirulina Platensis Extract Ubiquinone Glycerin Camellia Sinensis Leaf Extract Tocopheryl Acetate BHT
Caution for sensitive skin
Calendula Officinalis Flower Extract Glycerin Camellia Sinensis Leaf Extract PEG-40 Hydrogenated Castor Oil Phenoxyethanol BHT Retinol

Ingredients list

27 total
Lower hazard (1) Higher hazard (9)
All27 Skin Conditioning20 Fragrance9 Humectant6 Antioxidant5 Skin Protecting5 Perfuming5 Masking3 Hair Conditioning3
EWG CIR Ingredient Name & Cosmetic Functions Notes
1
Water
(Solvent)
3
B
Polysorbate 20
(Emulsifying, Surfactant)
Fungal Acne
Fungal Acne Trigger
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
A
Hydroxyethylcellulose
(Binding Agent, Emulsion Stabilising, Film Forming, Viscosity Increasing Agent, Binding, Stabilising, Viscosity Controlling)
9
A
Retinol
(Skin Conditioning)
Bad for Sensitive Skin
Bad for Sensitive Skin
3
B
PEG-40 Hydrogenated Castor Oil
(Fragrance, Emulsifying, Surfactant, Perfuming)
Fungal Acne
Fungal Acne Trigger
6
A
BHT
(Antioxidant, Fragrance, Masking)
1
A
Sodium Hyaluronate
(Skin Conditioning, Humectant)
Good for Dry Skin
Good for Dry Skin
3
B
Sodium Hydroxide
(Denaturant, Ph Adjuster, Buffering Agent)
ASCORBIC ACID
(Antioxidant, Buffering, Fragrance, Skin Conditioning)
Humulus Lupulus Extract
(Antimicrobial, Antiperspirant, Fragrance, Hair Conditioning, Skin Conditioning, Skin Protecting)
Lavandula Angustifolia Flower/Leaf/Stem Extract
(Flavouring, Fragrance, Oral Care, Perfuming, Skin Conditioning)
1
A
Calendula Officinalis Flower Extract
(Masking, Perfuming, Skin Conditioning)
CHAMOMILLA RECUTITA FLOWER EXTRACT
(Fragrance, Skin Conditioning)
citrus limon peel extract
(Skin Conditioning, Skin Conditioning Emollient, Skin Protecting, Tonic)
1
Spirulina Platensis Extract
(Skin Protecting)
Cucumis Sativus Seed Extract
(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
Pyrus Malus Fruit Extract
(Skin Conditioning)
3
Tocopheryl Acetate
(Antioxidant, Skin Conditioning)
Bad for Oily Skin
Bad for Oily Skin
Retinyl Palmitate
(Skin Conditioning, Skin Conditioning Miscellaneous)
1
Ubiquinone
(Antioxidant, Skin Conditioning)
1
Honey
(Flavoring Agent, Humectant, Emollient, Moisturising)
1
A
Panthenol
(Antistatic Agent, Hair Conditioning, Skin Conditioning)
Good for Dry Skin
Good for Dry Skin
4
A
Phenoxyethanol
(Fragrance, Preservative)
Paraben
Paraben
1
A
Ethylhexylglycerin
(Deodorant, Skin Conditioning)
PARFUM
(Fragrance, Perfuming)

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

Glycerin
Humectant, Skin Protecting
Retinol
Skin Conditioning
BHT
Antioxidant
Sodium Hyaluronate
Skin Conditioning, Humectant
ASCORBIC ACID
Antioxidant, Skin Conditioning
Humulus Lupulus Extract
Skin Conditioning, Skin Protecting

Benefits

Good for oily/acne-prone skin

Concerns

Contains paraben
Not fungal acne (malassezia) safe
Retinol — higher EWG
May not suit dry skin
May not suit sensitive skin

EWG flags hazard, not real-world risk — ratings don't account for how much of an ingredient a product contains. Treat these as things to research, not verdicts. How we score →

Ingredients explained

Water
Solvent
Low-hazard ingredient.Read moreShow less
EWG 1 Solvent
Hydroxyethylcellulose
Binding agent, Emulsion stabilising
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Binding agentEmulsion stabilisingFilm formingViscosity increasing agentBindingStabilisingViscosity controlling
Sodium Hydroxide
Denaturant, Ph adjuster
Low-to-moderate hazard.Read moreShow less
EWG 3 CIR B DenaturantPh adjusterBuffering agent
ASCORBIC ACID
Antioxidant, Buffering
Limited public safety data.Read moreShow less
EWG N/A AntioxidantBufferingFragranceSkin conditioning
Humulus Lupulus Extract
Antimicrobial, Antiperspirant
Limited public safety data.Read moreShow less
EWG N/A AntimicrobialAntiperspirantFragranceHair conditioningSkin conditioningSkin protecting
Lavandula Angustifolia Flower/Leaf/Stem Extract
Flavouring, Fragrance
Limited public safety data.Read moreShow less
EWG N/A FlavouringFragranceOral carePerfumingSkin conditioning
Calendula Officinalis Flower Extract
Masking, Perfuming
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A MaskingPerfumingSkin conditioning
CHAMOMILLA RECUTITA FLOWER EXTRACT
Fragrance, Skin conditioning
Limited public safety data.Read moreShow less
EWG N/A FragranceSkin conditioning
citrus limon peel extract
Skin conditioning, Skin conditioning emollient
Limited public safety data.Read moreShow less
EWG N/A Skin conditioningSkin conditioning emollientSkin protectingTonic
Spirulina Platensis Extract
Skin protecting
Low-hazard ingredient.Read moreShow less
EWG 1 Skin protecting
Cucumis Sativus Seed Extract
Skin conditioning
Limited public safety data.Read moreShow less
EWG N/A Skin conditioning
Pyrus Malus Fruit Extract
Skin conditioning
Limited public safety data.Read moreShow less
EWG N/A Skin conditioning
Retinyl Palmitate
Skin conditioning, Skin conditioning miscellaneous
Limited public safety data.Read moreShow less
EWG N/A Skin conditioningSkin conditioning miscellaneous
Ubiquinone
Antioxidant, Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 AntioxidantSkin conditioning
Honey
Flavoring agent, Humectant
Low-hazard ingredient.Read moreShow less
EWG 1 Flavoring agentHumectantEmollientMoisturising
+ 2 more — see the full ingredients list above
Polysorbate 20
Emulsifying, Surfactant
Low-to-moderate hazard.Read moreShow less
EWG 3 CIR B EmulsifyingSurfactant Fungal-acne trigger
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
Retinol
Skin conditioning
Potentially a skin irritantRead moreShow less
EWG 9 CIR A Skin conditioning Bad for Sensitive Skin
PEG-40 Hydrogenated Castor Oil
Fragrance, Emulsifying
Low-to-moderate hazard.Read moreShow less
EWG 3 CIR B FragranceEmulsifyingSurfactantPerfuming Fungal-acne trigger
BHT
Antioxidant, Fragrance
Moderate-hazard ingredient.Read moreShow less
EWG 6 CIR A AntioxidantFragranceMasking
Sodium Hyaluronate
Skin conditioning, Humectant
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Skin conditioningHumectant Good for Dry Skin
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
Tocopheryl Acetate
Antioxidant, Skin conditioning
Potentially comedogenic - can block poresRead moreShow less
EWG 3 AntioxidantSkin conditioning Bad for Oily Skin
Panthenol
Antistatic agent, Hair conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Antistatic agentHair conditioningSkin conditioning 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 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) (Retinol, 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.

Retinol, 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

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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