Ingredient glossary
Pentylene Glycol
On your shelf ✓What Pentylene Glycol does for your skin, who it suits, and what to watch for.
INCI: Pentylene Glycol · Also: 1,2-Pentanediol, Pentane-1,2-diol
In short: Pentylene Glycol delivers hydration and preservation, suits most skin types, and the evidence behind it is moderate.
- What it does
- Hydration, preservation
- Best for
- Dry, Combination, Oily, Sensitive skin
- Evidence
- Moderate
The molecule
The Glow take
Can help, with honest expectations.
When your goal is deep, lasting hydration, Pentylene Glycol can genuinely help, with a solid amount of evidence behind it. It tends to suit dry skin best.
— Maya
What it does
- hydration
- preservation
- texture
moderate evidenceIndustry survey data in a CIR expert panel review put its use in cosmetics anywhere from 0.001 to 5 percent, so 1 to 5 percent is the preservation range, not typical use. The booster role has one independent test behind it: in an unfunded 2020 cream study, 5 percent alone failed the European challenge test against mould, while adding 0.05 percent sorbic acid to the same cream brought it to a full pass. The water activity explanation is supplier framing rather than a measured finding, and those authors credit the molecule slipping into microbial membranes instead. Tolerance is usually good, but the only human patch test in that review used 0.112 percent, published case reports describe positive reactions at 0.5 and 5 percent, and it is a demonstrated penetration enhancer, so it can carry the rest of a formula deeper.
On a label: usually effective at 1-5%.
Who it's for, and who should skip it
Tends to suit
- dry
- dehydrated
- combo
- oily
- acne prone
- sensitive
Approach with care
No specific group flagged to avoid it.
- Irritation riskLow
How it fits each skin type
- DrySuits
- CombinationSuits
- OilySuits
- SensitiveSuits
Often chosen for acne prone.
Where it fits in your routine
Plays well with
- humectants
- preservatives
- hyaluronic acid
- niacinamide
Pentylene Glycol, answered
Is Pentylene Glycol safe during pregnancy?
Yes. Pentylene Glycol is considered safe to use during pregnancy and breastfeeding. As with anything, if you are unsure it is worth a quick word with your doctor or midwife.
Who should avoid Pentylene Glycol?
No specific group is flagged to avoid Pentylene Glycol. It is well tolerated by most skin. Still, introduce anything new one product at a time.
What concentration of Pentylene Glycol actually works?
Pentylene Glycol tends to do its job in the 1 to 5% range. Much lower and it is likely underdosed.
Does it clog pores?
Reported at 0 of 5: very low likelihood of clogging pores.
- This rating comes from old lab tests on the isolated ingredient, not the finished product.
- The full formula, how much is used, and your own skin all matter more than one number.
- If you are acne-prone it is worth noticing, not a reason to avoid it on sight.
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Compare Pentylene Glycol with
Can you mix Pentylene Glycol with
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Sources & how we reviewed this
- PMID 23064773abstract only, the full text is paywalled
- PMID 33233527read in full