Boswellia serrata extract
An extract from the gum resin of a tree and also a source of Indian frankincense, this plant extract has both positive and negative qualities for skin. Its fragrant components have the potential to be sensitizing.
On the flipside, Boswellia serrata also has research showing it has an skin-soothing effect. Clearly there’s some benefit for skin, but there are potential risks, too, just like with lots of other fragrant plant extracts.
References for this information:
Toxicology Mechanisms and Methods, November 2010, issue 9, pages 556–563
Toxicology Letters, March 2008, issue 2, pages 144-149
Dermatologic Therapy, January-February 2010, issue 1, pages S28–S32
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