Citrobiotic aktiv+ Bio, immune system from Sanitas is a full-spectrum food supplement based on grapefruit bioflavonoids and dehydrated echinacea juice, ideal for the wet and cold season. CitroBiotic aktiv Bio is a high-quality dietary supplement "Made in Germany" with a proven extract of grapefruit seeds and peel in combination with organic echinacea. Grapefruit: A True Power Fruit The positive properties of grapefruit are well known for its vitamin C content. On the other hand, the secondary plant substances that grapefruit also contains, called bioflavonoids, are relatively unknown. Chemically, flavonoids are glycosides. They are relatively large plant molecules found predominantly in above ground plant parts. Bioflavonoids are found especially in the seeds and skins of fruits and vegetables, that is, in the components that we usually eliminate. It is recommended to take 15 drops (15 drops = 0.75 ml) three times a day. Food supplements are not a substitute for a varied and balanced diet or a healthy lifestyle. The indicated daily intake should not be exceeded. Store in a dry place, at no more than 25°C and out of the reach of small children.