Luteolin is a flavonoid that’s present in fruits and vegetables, such as; celery, artichoke, citrus, and more. Flavonoids are plant-derived substances that are in most foods within an average person’s diet. There are 4,000 plus types in the world, with Luteolin being the most abundant. Today, Piping Rock’s Luteolin Complex provides you with 50 mg Luteolin, and 50 mg Rutin.