Phloretin is a dihydrochalcone phytochemical found in apples, apple tree bark, pears, strawberries, and additional fruit tissues. It contributes to the polyphenol profile associated with apples and related fruits.
Phloretin functions mainly as a polyphenolic antioxidant involved in oxidative stress modulation, membrane-associated signaling interactions, glucose transport-related pathways, and inflammatory responses. Research has explored its effects on cellular transport systems, antioxidant enzymes, inflammatory mediators, and mitochondrial signaling.
Within apples, phloretin commonly occurs together with its glycosylated form phloridzin.
Plants synthesize phloretin through flavonoid and chalcone biosynthesis pathways derived from phenylalanine metabolism. Apple bark and fruit tissues can accumulate phloretin-related compounds as part of defense and oxidative protection systems.
Environmental conditions, fruit maturity, storage, and processing influence concentrations. Hydrolysis of phloridzin during digestion may also contribute to phloretin exposure.
After ingestion, phloretin undergoes absorption, conjugation, microbial metabolism, and circulation through detoxification pathways.
Phloretin activity is regulated by food matrix interactions, intestinal absorption, microbiome composition, hepatic metabolism, and oxidative environment. Fruit processing influences concentration and stability.
Research suggests phloretin may interact with oxidative stress pathways, membrane transport systems, inflammatory mediators, and mitochondrial responses. Biological effects depend on concentration, metabolism, and tissue localization.
Consumption from apples and related fruits provides phloretin together with phloridzin, fiber, flavonoids, minerals, and additional polyphenols that collectively contribute to antioxidant and metabolic signaling systems.
| Inhibitor / Factor | Effect on Activity / Absorption |
|---|---|
| Peeling/processing lowers content; whole-fruit matrices help. |
