Flavonols are common in plant-based foods but are found in highest concentrations in onions, apples, berries, kale and b黄酮醇是植物类食物中的常见物质，在洋葱、苹果、浆果、羽衣甘蓝和西兰花中含量最高。
Growth, Development and Changes of Several Enzyme Activities in Chinese Kale (Brassica alboglablre Brailey)芥蓝生长发育与几种酶活力的变化