Slimming Green Tea Keva Slim Tea in joint venture with Kanid Biotech, Tokyo, Japan, is 100% natural product & without any sort of side effects. The health benefits of this herbal tea come from its natural antioxidant contents. This product is produced under internationally acclaimed GMP regulations and this is HALAL & Kosher Certified product. Keva slim Tea is combination of natural herbs without any chemicals so it is safe for your body and health. These contain many kinds of vitamins, mineral substances, food fibers and micro elements.