For adults: this ingredient is a preservative that can release tiny amounts of formaldehyde. Most adults tolerate it, but it commonly causes skin irritation or allergic reactions in sensitive people. Some countries limit its use.
If you’re an adult using a product with this ingredient: do a small patch test on your inner forearm before using widely; avoid using it on broken, red, or inflamed skin; stop use if you get itching, redness, swelling, or a rash; choose products labeled for sensitive skin or preservative-free if you’ve had reactions to preservatives before.
Watch for allergic skin reactions and irritation — industry safety reviews report it as a skin sensitizer. There are contamination concerns with formaldehyde and some countries limit or prohibit its use in certain products (reported by regulatory reviews and the Japan health authority). There is limited evidence about cancer risk in older evaluations. If you have a known preservative allergy, choose products without this ingredient (sources: industry safety review, Japan health regulators, chemical hazard evaluations).
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This ingredient has the following documented risks:
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This ingredient may also be listed as:
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This ingredient is found in the following products:
This list shows products that contain Dmdm Hydantoin or its alternative names.
Scientific research related to this ingredient:
These research articles provide scientific evidence about Dmdm Hydantoin safety and effects.
Use caution with Dmdm Hydantoin for adults. Some safety concerns have been identified.
Could weaken or confuse immune system.
Can cause skin redness, itchiness, or rashes—especially on sensitive baby skin.
Connected to cancer risk with long-term or repeated exposure.
Banned or heavily restricted in one or more countries.
Can be absorbed through the skin and get into the bloodstream.
Linked to triggering or worsening eczema and similar skin conditions.
Dmdm Hydantoin is commonly found in skincare products, cosmetics, and topical applications. Always check ingredient labels before use.
The appropriate age depends on the specific ingredient properties and concentration. This analysis is for adults. Use the age selector above to check other ages.
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