The Grapefruit Seed Extract CitroPlus forte is a food supplement providing organic flavonoids (like e.g. naringin, isonaringin, neohesperidin) from the grapefruit, which are dissolved in plant-based organic glycerine. These flavonoids have a cell-protecting and cell-activating effect and sustain the metabolism of the human body. They represent a huge boost for the immune system above all in the winter (but not only then). The product has been discovered in the United States about 30 years ago and imported to Germany and Europe in the mid-1990s. The Grapefruit Seed Extract from GSE was the first of its kind in organic quality on the global market. CitroPlus forte represents the third generation of our product and contains highly concentrated organic flavonoids, i.e. 1200 mg per 100 ml (after its predecessors with 600 and 800 mg, respectively).