Grapefruit Essential Oil is a wonderfully energizing oil that isn't too strong or overpowering.
Grapefruit Oil is also great to diffuse with other energizing oils like rosemary because it lightens up and sweetens the blend. Grapefruit Oil has a pleasantly sweet, tangy/tart aroma that blends well with a number of other essential oils including Frankincense, rosemary & fir needle. 
 
Major Constituents of Citrus paradisi
(+)-Limonene
B-Myrcene
a-Pinene
Sabinene 
Nootkatone
Bergapten