Citrus Grandis Peel Oil
The essential oil coming from the rind of the grapefruit. In general, the main component of citrus peel oils is limonene (86-95% for grapefruit peel), a super common fragrant ingredient that makes everything smell nice (but counts as a frequent skin sensitizer).
Other than that, citrus peel also contains the problematic compound called furanocoumarin that makes them mildly phototoxic. In general, the more sour-bitter the fruit, the more problematic it is regarding phototoxicity: orange and clementine peel contain less of it while lemon, grapefruit, and bergamot contain some more. Be careful with it if it is in a product for daytime use.
Show me some proof
- Shaw, Philip E. "Review of quantitative analyses of citrus essential oils." Journal of Agricultural and Food Chemistry 27.2 (1979): 246-257.
- Dugrand, Audray, et al. "Coumarin and furanocoumarin quantitation in citrus peel via ultraperformance liquid chromatography coupled with mass spectrometry (UPLC-MS)." Journal of agricultural and food chemistry 61.45 (2013): 10677-10684.