Bioflavonoids is a group of 4,000 substances which are in charge of the colors of the plant world. Bioflavonoids have an important and varied biological activity. Bioflavonoids co-operate with vitamin C and improve its absorption and its activity. The biological activity of the bioflavonoids is being expressed by protecting blood vessels, strengthening them and maintaining their flexibility. In addition, the bioflavonoids also have anti-inflammatory, anti-viral and anti-oxidative activity and they also support the immune system. Sources for bioflavonoids from food are: many spices, fruit (mostly citrus, strawberries, blueberries) and vegetables (green and red peppers, tomatoes) and many additional varied edible herbs.