Is methylparaben safe? The paraben limits and what regulators found

Preservative (cosmetics; also a limited food and drug preservative) · Also known as: Methyl paraben, Methyl 4-hydroxybenzoate, Methyl p-hydroxybenzoate, Sodium methylparaben, E 218, E 219 (sodium salt), CAS 99-76-3 · Reviewed Sep 19, 2026 · 13 sources

Where methylparaben (and the parabens) is allowed

What is methylparaben (and the parabens)?

Parabens are a family of related preservatives. FDA says the ones used most in cosmetics are methylparaben, propylparaben, butylparaben and ethylparaben, often combined with other preservatives. Health Canada adds that parabens also serve as antimicrobials, flavour enhancers and fragrance ingredients, that some are permitted food additives, and that some occur naturally in certain foods.

Why it's used, and where you'll find it

FDA says preservatives such as parabens stop harmful bacteria and mold growing in cosmetics, protecting both the product and the person using it. Health Canada notes that most cosmetics contain preservatives because bathrooms are warm and damp and because microorganisms can get in when a product or its applicator touches skin or hair.

• makeup
• moisturisers
• hair care products
• shaving products
• some medicines
• some foods (limited categories)

What the research and regulators say

What the EU safety committee concluded

In an opinion adopted in December 2023 (corrigendum February 2024), the SCCS concluded that methylparaben is safe as a preservative at up to 0.4% (as acid), and at up to 0.4% within a mixture of esters totalling no more than 0.8%. Its safety margins were above 100 for combined exposure across cosmetic categories, though it noted that no proper human skin-absorption study exists and assumed 50% absorption instead. The Cosmetic Ingredient Review (CIR), an expert panel set up by the cosmetics industry, reached a similar view in 2020: 20 of 21 parabens safe as used when total parabens stay at or below 0.8%, with too little data on benzylparaben. ^{[7, 9, 13]}

The hormone-related concerns

The SCCS looked specifically at endocrine activity. It reported weak estrogenic activity in some laboratory studies at high concentrations only, and mixed animal results: two studies showed increased uterine weight, but guideline studies did not show estrogenic effects. There were indications of anti-androgenic activity in animals, such as reduced anogenital distance in male pups at the highest dose and effects on sperm; thyroid changes at 1,000 mg per kg per day were judged too weak to conclude on. It said human data support the animal observations that some male reproductive parameters might be modulated, but do not provide sufficient evidence for adverse effects in humans, and it still concluded 0.4% is safe. ^[7]

Cancer and genetic damage

The SCCS said the carcinogenicity studies it examined had limited value, but that the evidence shows methylparaben is not mutagenic and the literature gives no indication of carcinogenicity. Some chromosome-damage tests were of limited reliability, so it could not fully exclude a genotoxic effect on those alone. FDA says that if it determines a paraben health hazard exists, it will advise industry and the public and consider its legal options. ^{[1, 7]}

Babies and nappy-area products

In a 2011 clarification, the SCCS saw no safety concern for children of any age from general cosmetics containing parabens, excluding nappy-area products; its worst-case assessment used butylparaben. For babies under six months and leave-on nappy-area products it could not exclude a risk, citing immature metabolism and possibly damaged skin. Its 2023 methylparaben opinion did not include a combined assessment for children using oral and skin products together, because the exposure data supplied were incomplete. ^{[7, 8]}

Who might choose to avoid it

No regulator we found singles out a group to avoid methylparaben at permitted levels. EU rules do bar propyl- and butylparaben from leave-on nappy-area products for under-3s, but not methylparaben. Some people choose 'paraben-free' products because of the hormone-related findings or a personal reaction, which is a preference rather than regulator advice, and such products still need another preservative.

How to spot it on a label

Look for 'Methylparaben' (its salt is 'Sodium Methylparaben'); other family members end in -paraben. In EU food labelling, methyl p-hydroxybenzoate is E 218 and its sodium salt is E 219.

Frequently asked questions

Related ingredients

• Phenoxyethanol
• Fragrance (Parfum)
• Sodium benzoate

This page summarizes what regulators and published research say, as of the review date above. Rules and evidence change; check the linked sources for the latest. It is general information, not medical advice — talk to a doctor or pharmacist about your own health.