Mata-Bilbao Mde L., Andres-Lacueva C., Roura E., Jauregui O., Escribano E., Torre C., Lamuela-Raventos R.M. (2007) Absorption and pharmacokinetics of grapefruit flavanones in beagles. Br J Nutr 98:86-92 PubMed (17391560)

Compound Mean content
Naringin 84.2 mg/400 g dry weight
Narirutin 48 mg/400 g dry weight
Naringenin 8.6 mg/400 g dry weight