Pure kaempferol is a yellow coloured powder. Amphoral is one of the most important and most widespread flavonoids (containing the typical C6-C3-C6 structure). Kaempferol is a flavonoid present in various natural sources including apples, onions, leeks, citrus fruits, grapes, red wines, gingko biloba, St. John's wort.

Keampferol is a strong antioxidant and helps to prevent oxidative damage of our cells, lipids and DNA. Kaempferol seems to prevent arteriosclerosis by inhibiting the oxidation of low density lipoprotein and the formation of platelets in the blood. Studies have also confirmed that kaempferol acts as a chemopreventive agent, which means that it inhibits the formation of cancer cells.

Numerous preclinical studies have shown kaempferol and some glycosides of kaempferol have a wide range of pharmacological activities, including antioxidant, anti-inflammatory, antimicrobial, anticancer, cardioprotective, neuroprotective, antidiabetic, antiosteoporotic, estrogenic/antiestrogenic, anxiolytic, analgesic, and antiallergic activities.