Ingredients

Bronopol — a preservative that can release formaldehyde and form nitrosamines.

Also written Bronopol

One of five parabens banned from cosmetics in the EU since 2014 because their safety couldn't be shown.

A formaldehyde-releasing preservative and a known cause of contact allergy.

A preservative that works by slowly releasing formaldehyde, a known sensitizer and carcinogen. Products containing releasers must carry a warning in the EU when formaldehyde levels are high.

A formaldehyde-releasing preservative and a known cause of contact allergy.

One of five parabens banned from cosmetics in the EU since 2014 because their safety couldn't be shown.

One of five parabens banned from cosmetics in the EU since 2014 because their safety couldn't be shown.

A strong sensitizer, usually paired with MIT. Allowed only in rinse-off products in the EU.

Also written Kathon CG, MCI, Methylchloroisothiazolinone/Methylisothiazolinone

A preservative behind an epidemic of contact allergy in the 2010s. Banned in leave-on products in the EU; allowed only at low levels in rinse-off.

Also written MI, MIT

One of five parabens banned from cosmetics in the EU since 2014 because their safety couldn't be shown.

One of five parabens banned from cosmetics in the EU since 2014 because their safety couldn't be shown.

A formaldehyde-releasing preservative, banned in cosmetics in the EU.

An antibacterial restricted in the EU and removed from US antibacterial soaps, over hormone effects, antibiotic resistance and environmental harm.