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* A preservative
*Please read TIA's articles on Preservatives and Are They Safe and Why Products Need Preservatives
Methyldibromo Glutaronitrile is a preservative used to limit the growth of bacteria and other micro-organisms in beauty products in cosmetics. It is seen most often in hand creams and body lotions, although in recent years, it has been found to cause an increase in cases of eczema and other allergic reactions (source).
Safety Measures/Side Effects:
According to a study done in Europe, despite the use of Methyldibromo Glutaronitrile as a preservative in cosmetic products since the early 1980s, it seems that allergic reactions are increasing. Analysis from 16 dermatology clinics in 11 countries of more than 50,000 patients showed an increase allergic reactions from 0.7% in 1991 to 3.5% in 2000. Because of this increase, it has been banned in leave-on products in the European Union.
According to the Cosmetic Database, Methyldibromo Glutaronitrile is a sensitizer that can "can instigate immune system response that can include itching, burning, scaling, hives, and blistering of skin" and the Journal of the American College of Toxicology in 1996 found it to cause contact dermatitis. However, it is considered CIR approved for use in rinse-off cosmetics. It should be used with caution, but is an effective preservative at low concentrations.
Recommended Products w/ Methyldibromo Glutaronitrile:
L’Annine Avocado Hand and Body Cream, Stem Organics Gentle Cleansing Milk, Hydropeptide Eye Extreme Dark Circle Concentrate