INGREDIENT GLOSSARY • Preservative

Diazolidinyl Urea

AT A GLANCE

Diazolidinyl Urea

A safe and effective preservative that prevents the growth of bacteria.

Type of Ingredient

Preservative

Why we use it

Diazolidinyl urea, or DU, is a common preservative used to keep skincare safe and free of bacteria. It releases a tiny amount of formaldehyde - a fraction of the amount found in a medium-sized pear. Stratia products contain less than 0.2% diazolidinyl urea.

What it’s in

Liquid Gold, Rewind, Velvet Cleansing Milk, Soft Touch AHA, Night Shift

For a comprehensive analysis of all safety data and research on diazolidinyl urea, you can read the International Journal of Toxicology’s Final Safety Assessment:

  • https://journals.sagepub.com/doi/abs/10.3109/10915819009078735
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