Fisetin is a naturally occurring flavonoid found in various fruits and vegetables, such as strawberries, apples, persimmons, onions, and cucumbers. It is recognized for its potent antioxidant, anti-inflammatory, and neuroprotective properties. Research has shown that fisetin may help reduce age-related cognitive decline, support brain health, and promote cellular health by eliminating senescent (aged) cells, making it a promising compound in anti-aging and longevity studies.