Citrus Paradisi Peel Oil
The essential oil coming from the peel of the pink grapefruit. In general, the main component of citrus peel oils is limonene (around 90% for grapefruit peel), a super common fragrant ingredient that makes everything smell nice (but counts as a frequent skin sensitizer). Similar to other essential oils, grapefruit peel has also antibacterial and antifungal acitivity.
Other than that, citrus peels contain the problematic compounds called furanocoumarins that make them (mildly) phototoxic. So be careful with grapefruit peel oil, especially if it's in a product for daytime use.
Show me some proof
- Uysal, Burcu, et al. "Essential oil composition and antibacterial activity of the grapefruit (Citrus Paradisi. L) peel essential oils obtained by solvent‐free microwave extraction: comparison with hydrodistillation." International Journal of Food Science & Technology 46.7 (2011): 1455-1461.
- Njoroge, Simon Muhoho, et al. "Volatile constituents of redblush grapefruit (Citrus paradisi) and pummelo (Citrus grandis) peel essential oils from Kenya." Journal of agricultural and food chemistry 53.25 (2005): 9790-9794.
- Viuda-Martos, M., et al. "Antifungal activity of lemon (Citrus lemon L.), mandarin (Citrus reticulata L.), grapefruit (Citrus paradisi L.) and orange (Citrus sinensis L.) essential oils." Food control 19.12 (2008): 1130-1138.
- 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.