This grapefruit essential oil comes directly from our trees and is rapidly extracted from the fresh peel only, not from crushed fruit. It is a mixture of approximately 50% Duncan (white) and 50% Ruby Star (red) grapefruits. The scent is very bright and refreshing, it has a tangy crisp, clean finish with an underlying sweetness, akin to savoring the juiciest grapefruit at its peak ripeness in the orchards.
​
​
The main constituents of grapefruit essential oil are well known, limonene (90%), β-myrcene (3%) and nootkatone (2%) but also β-pinene (13.3%), sabinene (2.2%) and α-pinene (2.1%) according to a Tunisian publication (2023) that also showed that it is one of the most powerful (in vitro) as antibacterial, antifungal and anticoagulant (greater than the activated partial thromboplastin time obtained with heparin! )
And is cited against candidate alibicans which confirmed the Mexican works (2020).
To the extent that  nano-emulsions are being made for antioxidant and antimicrobial use (2023)
At the beginning of 2024, another academic publication showing the interest of the EO of the Foster cultivar (old white variety from Florida) provides anti-glucosidase, anti-amylase and anti-tyrosinase activities, “making it a potent candidate for nutraceuticals and skin care products,” the authors write.
​