Fisetin in Food: Natural Sources, How Much You Get, and Why Supplements Exist
Fisetin occurs naturally in strawberries, apples, and onions—but in small amounts. Learn what foods contain it and why researchers use supplements.
What Is Fisetin
Fisetin Bioavailability: Why Oral Absorption Is Low and What Formulation Science Is Doing About It
Fisetin’s oral bioavailability is poor due to low solubility and rapid gut metabolism. Learn why absorption is limited and what formulation science offers.