Serum 71

Circadia

Where to buy Possibly in stock

About this product

The Circadia Serum 71 is a serums, essence, ampoule. Our analysis of its 12 ingredients (8 low-risk) rates it Excellent (96/100). 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
Serums, Essence, Ampoules
Ingredients
12
Low-risk
8
Fragrance
Fragrance-free
Origin
United States
Data updated
Jun 2026

The evidence

Quick Product Notes

Paraben-Free Sulfate-Free Alcohol-Free Silicone-Free EU Allergen-Free Fungal Acne (Malassezia) Safe Minimal Ingredients

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 3/2
Good for dry skin
Butylene Glycol Sodium PCA Glycerin
Caution for dry skin
Glycerin Tranexamic Acid
Oily/Acne-Prone Skin 2/0
Good for oily/acne-prone skin
Azelaic Acid Tranexamic Acid
Sensitive Skin 1/4
Good for sensitive skin
Glycerin
Caution for sensitive skin
Azelaic Acid Butylene Glycol Glycerin Phenoxyethanol

Ingredients list

12 total
Lower hazard (1) Higher hazard (4)
All12 Skin Conditioning7 Humectant5 Solvent4 Fragrance4 Viscosity Controlling3 Emulsion Stabilising2 Film Forming2 Hair Conditioning2
EWG CIR Ingredient Name & Cosmetic Functions Notes
1
Water
(Solvent)
1
Propanediol
(Solvent, Viscosity Decreasing Agent, Viscosity Controlling)
1
Mandelic Acid
(Antimicrobial)
1
A
Butylene Glycol
(Fragrance, Skin Conditioning, Solvent, Viscositydecreasing Agent, Humectant, Masking, Viscosity Controlling)
Good for Dry Skin
Good for Dry Skin
Tranexamic Acid
(Cosmetic Astringent, Skin Conditioning)
1
B
Sodium PCA
(Hair Conditioning, Humectant, Antistatic Agent, Skin Conditioning)
Good for Dry Skin
Good for Dry Skin
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
Methylglucoside Phosphate
(Skin Conditioning)
1
A
Azelaic Acid
(Fragrance, Ph Adjuster, Buffering Agent, Masking)
Magnesium Carboxymethyl Beta-Glucan
(Skin Conditioning)
1
A
Hydroxyethylcellulose
(Binding Agent, Emulsion Stabilising, Film Forming, Viscosity Increasing Agent, Binding, Stabilising, Viscosity Controlling)
4
A
Phenoxyethanol
(Fragrance, Preservative)
Paraben
Paraben

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

AHA
Exfoliates skin for a brighter complexion.
Azelaic Acid
Gently exfoliates and reduces inflammation.
Tranexamic Acid
Helps fade dark spots and even skin tone.

Benefits

HydratingBoosts hydration and relieves dry, tight skin.
Barrier RepairStrengthen and restore your skin's natural barrier.
BrighteningRestores radiance to dull, tired skin.
Reduces IrritationEases discomfort and supports skin resilience.
Scar HealingImproves the look of marks and scars.
Dark SpotsFades dark spots for even skin tone.
Acne FightingFights acne and helps prevent breakouts.
Good For Oily SkinBalances oil and helps reduce shine.

Concerns

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

Ingredients explained

Water
Solvent
Low-hazard ingredient.Read moreShow less
EWG 1 Solvent
Propanediol
Solvent, Viscosity decreasing agent
Low-hazard ingredient.Read moreShow less
EWG 1 SolventViscosity decreasing agentViscosity controlling
Mandelic Acid
Antimicrobial
Low-hazard ingredient.Read moreShow less
EWG 1 Antimicrobial
Tranexamic Acid
Cosmetic astringent, Skin conditioning
Limited public safety data.Read moreShow less
EWG N/A Cosmetic astringentSkin conditioning
Methylglucoside Phosphate
Skin conditioning
Limited public safety data.Read moreShow less
EWG N/A Skin conditioning
Azelaic Acid
Fragrance, Ph adjuster
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A FragrancePh adjusterBuffering agentMasking
Magnesium Carboxymethyl Beta-Glucan
Skin conditioning
Limited public safety data.Read moreShow less
EWG N/A Skin conditioning
Hydroxyethylcellulose
Binding agent, Emulsion stabilising
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Binding agentEmulsion stabilisingFilm formingViscosity increasing agentBindingStabilisingViscosity controlling
Butylene Glycol
Fragrance, Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A FragranceSkin conditioningSolventViscositydecreasing agentHumectantMaskingViscosity controlling Good for Dry Skin
Sodium PCA
Hair conditioning, Humectant
Low-hazard ingredient.Read moreShow less
EWG 1 CIR B Hair conditioningHumectantAntistatic agentSkin conditioning 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
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 Evening, start slow: Best in the PM a few times a week to begin with; avoid layering with other strong actives the same night.
  • 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.

Mandelic 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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