Myricetin is a flavonol phytochemical found in berries, grapes, onions, tea, kale, herbs, walnuts, and numerous fruits and vegetables. It belongs to the flavonoid family and contributes to the antioxidant chemistry of many plant foods.
Myricetin functions mainly as a polyphenolic antioxidant involved in oxidative stress modulation, endothelial signaling, inflammatory pathway interactions, and cellular redox regulation. Research has explored its effects on reactive oxygen species pathways, antioxidant enzymes, mitochondrial responses, and inflammatory mediators.
Within plants, myricetin contributes to defense against ultraviolet stress and oxidative damage.
Plants synthesize myricetin through flavonoid biosynthesis pathways derived from phenylalanine metabolism. Hydroxylation reactions produce the highly hydroxylated flavonol structure characteristic of myricetin.
Environmental conditions, plant maturity, sunlight exposure, storage, and processing influence concentrations. Tea leaves and berries are recognized dietary contributors.
After ingestion, myricetin undergoes absorption, conjugation, microbial metabolism, and circulation through detoxification pathways.
Myricetin activity is regulated by food matrix interactions, intestinal absorption, microbiome metabolism, hepatic conjugation, and oxidative environment. Processing and cooking can alter flavonoid stability.
Research suggests myricetin may interact with oxidative stress pathways, endothelial signaling systems, inflammatory mediators, and mitochondrial responses. Biological effects depend on concentration, metabolism, and tissue exposure.
Consumption from berries, tea, vegetables, herbs, and nuts provides myricetin together with fiber, minerals, and additional flavonoids that collectively contribute to antioxidant and vascular signaling diversity.
| Inhibitor / Factor | Effect on Activity / Absorption |
|---|---|
| Phase II conjugation; matrix affects uptake. |
