US-based Rueckert Pharmaceutical Company manufactures and markets a range of dietary supplements that contain a proprietary standardized Korean Ginseng extract. Company chairman Dr. Karl H. Rueckert is the founder of the Institute for Coordination of International Medicinal Plant Research (IMR) and has spent decades researching human energy levels and metabolic responses. Immuvit, the company’s flagship product has an especially high effect in improving vitality and boosting physical and mental energy. Up until recently Rueckert’s Immuvit was marketed in Greece under a local brand name by the former distributor. With the commencement of the new Leriva/Rueckert partnership, the product is now marketed under Immuvit, the brand name and trademark used internationally.