Ingredient glossary
Citric Acid
On your shelf ✓What Citric Acid does for your skin, who it suits, and what to watch for.
INCI: Citric Acid
In short: Citric Acid delivers pH adjuster and mild exfoliation, suits most skin types, and the evidence behind it is moderate. One thing to know: clear it with your doctor if pregnant; introduce it gently.
- What it does
- PH adjuster, mild exfoliation
- Best for
- Most skin types
- Watch out
- Clear it with your doctor if pregnant; introduce it gently
- Evidence
- Moderate
The molecule
The Glow take
Nice to have, and nothing to overthink.
Citric Acid plays a quiet supporting role, rounding out a formula rather than being the reason you buy it.
— Maya
What it does
- pH adjuster
- mild exfoliation
- brightening
moderate evidenceEvidence supports citric acid as a mild exfoliant and pH adjuster that refines texture and supports acidic pH, though it is rarely the primary hero active in modern formulas.
Who it's for, and who should skip it
Tends to suit
- normal
- oily
- combo
Approach with care
- very sensitive
- compromised barrier
- Clogs poresLow
- Irritation riskModerate
- pH-dependentIts effect depends on the product's pH
How it fits each skin type
- DrySuits
- CombinationSuits
- OilySuits
- SensitiveTake care
Take extra care if any of these apply to you: compromised barrier.
Where it fits in your routine
Nobody has measured whether Citric Acid changes how your skin handles sun.
Chemically an alpha hydroxy acid and swept into AHA labelling language, but no citric-acid-specific human MED or sunburn-cell measurement exists; the AHA warning rests on glycolic and lactic acid data. It also cannot be answered at ingredient level, because nearly all cosmetic use is as a trace pH adjuster far below any exfoliating concentration.
SCCNFP/SCCS AHA opinion (human MED data are for glycolic and lactic acid); CIR citric acid assessment, irritation and sensitisation data only
Plays well with
- other ahas
- vitamin c
Citric Acid, answered
Is Citric Acid safe during pregnancy?
Clear it with your doctor first. Citric Acid is flagged as use-with-caution during pregnancy and breastfeeding, so check with your doctor or midwife before adding it.
Who should avoid Citric Acid?
Approach Citric Acid with care if any of these apply to you: very sensitive and compromised barrier. Its irritation risk is moderate, so introduce it slowly and patch test first.
What concentration of Citric Acid actually works?
Its concentration is rarely printed on the label, so use the ingredient list as your clue: near the top third it is likely doing real work, near the bottom it is more of a sprinkle.
During pregnancy
Treat Citric Acid as a maybe rather than a yes for now. It is flagged as one to use with caution while pregnant or breastfeeding, so it is worth clearing before you carry on.
When in doubt, check with your doctor or midwife. They outrank any website, including this one.When it is worth booking →
Compare Citric Acid with
Can you mix Citric Acid with
- Vitamin C (LAA)
- Retinol
- Salicylic acid (BHA)
- Lactic acid
- Glycolic acid
- Retinal
- Hydroxypinacolone Retinoate
- Retinyl Palmitate
- Retinyl Acetate
- Retinyl Propionate
- Retinyl Retinoate
- Tretinoin
- Adapalene
- Mandelic Acid
- Gluconolactone
- Lactobionic Acid
- Phytic Acid
- GHK-Cu
- Willow Bark Extract
- Capryloyl Salicylic Acid
- Papain
- Bromelain
- Ammonium lactate
- Sponge spicules
- Betaine Salicylate
This, for every label you own
One ingredient is easy. A full label is where it gets confusing. The Ingredient Decoder reads any product and tells you the honest truth, ingredient by ingredient.