Many people have started to pay closer attention to the ingredients in their skin and hair care products, thanks, in part, to the clean beauty movement. One particular ingredient, DMDM hydantoin, has ...

Many experts believe this chemical is safe in cosmetic and hygiene items, since they release only small amounts of formaldehyde in normal use. When you shampoo your hair, for example, the level of ...

Dimethylol-dimethyl (DMDM) hydantoin is a chemical used in a wide range of cosmetic products. While it can serve an important purpose in preventing the growth of bacteria and other microorganisms, ...

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In the past week, multiple TikToks and Facebook posts served as warnings for one popular, $8 drugstore hair product. “Yesterday I found out from my sister, who found out from her hairdresser, that OGX ...

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1,3-Bis (hydroxymethyl)-5,5-dimethyl-2,4-imidazolidinedione butyl carbamate DMDM hydantoin affected 2.6% of patch test patients in 2005–2006 (Zug et al., 2009). This is a broad-spectrum preservative.

We'll unpack those claims in a minute, but in the meantime, let's break down the ingredient in question. "DMDM hydantoin is a preservative used to protect cosmetics from microbial spoilage throughout ...