https://www.sciencedirect.com/science/article/pii/B9780128052570000077
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Flavanones are a small group of polyphenols specific for citrus fruits. The most studied are hesperetin and naringenin along with their glucosides. In this case, aglycones are absorbed more rapidly than glucosides, although aglycone forms are rarely found in natural sources. Their absorption takes place in the colon. Circulating forms of hesperetin are mainly glucuronides (87%) and sulfoglucuronides (13%). Urinary excretion for hesperetin and naringenin is usually finished 24 h after ingestion. The elimination of flavanones in urine is slower than for catechins, but it is faster than the excretion of quercetin.
