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Diazolidinyl urea

* It comes in the form of white powder.


An antimicrobial that's predominantly used as a preservative in cosmetic products, protecting them from from the bacteria, yeast and molds known to cause spoilage. It can be found in virtually every type of personal care products including as facial moisturizer/lotion, sunscreen, anti-aging treatment, cleanser, styling gel, foundation, shampoo/conditioner, eye cream, deodorant and mouthwash.

Safety Measures/Side Effects:

A lot of controversy surrounds the safety of diazolidinyl urea. Many believe it to be both toxic and carcinogenic, mainly due to the fact that it's a proven formaldehyde releaser. However, the Cosmetic Ingredient Review (CIR) Expert Panel evaluated the available data on this ingredient (and reevaluated it in 2006) and concluded it as safe to use on cosmetic products at a maximum concentration of .5%. Their studies demonstrated it to be neither toxic nor photosensitizing. However, tests did show it to produce mild skin irritations in some (1 out of 1000), so this ingredient should probably avoided by those with very sensitive skin.

While it is fair to say that no available data leads us to confidently categorize diazolidinyl urea as toxic and carcinogenic, many well respected scientists and doctors still recommend avoiding it. In You Being Beautiful, Doctors Michael Roizen and Mehmet Oz include it on their list of ingredients to avoid. This is because it may be contaminated by formaldehyde.

Recommended Products With Diazolidinyl Urea:

Osmotics Eye Surgery Under Eye Rejuvenator ($53), Nature's Beauty Bee Kiwi Hand and Nail Repair Cream ($19.50), Osmotics Blue Copper 5 Age Repair Body Lift ($95), LATHER 10-Minute Brightening Mask With Glycolic Acid ($28 in the shop), Osmotics Anti-Radical Age Defense Moisture Complex ($111).

As much as possible, products in the Truth In Aging shop are chosen for their safety profile as well as effectiveness.

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