Kaempferol

Kaempferol is a flavonol, a specific subclass of flavonoids that gives many plants their yellow pigmentation. You'll find it concentrated in cruciferous vegetables like kale and broccoli, berries such as strawberries and blackberries, and herbs including ginkgo biloba and St. John's wort [1]. Tea drinkers get regular exposure — both green and black teas contain significant amounts, with levels varying based on processing methods.

As a flavonoid, kaempferol belongs to a family of polyphenolic compounds that plants produce primarily for UV protection and pathogen resistance. What makes kaempferol particularly interesting is its ability to cross the blood-brain barrier, unlike many other flavonoids, which explains much of its neurological research focus [2]. Its molecular structure includes hydroxyl groups that make it an effective antioxidant, but its therapeutic effects go well beyond simple free radical scavenging.