What it is
Rosemary Extract is derived from the perennial herb rosemary (Rosmarinus Officinalis).
What it does
Rosemary Extract is used in a wide variety of beauty products for its antioxidant properties.
In addition, it is also has antimicrobial properties and can therefore be used as a preservative. In this case, it works by preventing the oils and fats in your skincare and cosmetic products from oxidizing (become rancid when exposed to oxygen).
Rosemary Extracts contains some aromatic components that can cause irritation and sensitization.
(Sources: Journal of Agricultural Food Chemistry, October 1999 and Chemical Research in Toxicology, November 2001)
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