Oolong tea naturally contains caffeine, which when taken in excess of 400 mg a day may cause nervousness, stomach upset, and headaches. Talk to your doctor before taking this product if you have a history of heart disease, as oolong‘s caffeine content may cause heart palpitations.Oolong tea is rich in vitamins, iron, calcium and minerals, digestive enzymes and contains ingredients to promote the decomposition of fat, can stimulate the pancreatic lipase activity, reducing sugar and fatty foods are absorption, promote fat burning, especially to reduce the accumulation of abdominal fat. Then addAs one of the leading oolong tea extract manufacturers and suppliers in China, we warmly welcome you to buy oolong tea extract from our factory. All our extract powder are with high quality and competitive price.Oolong tea extract is from traditional oolong tea. Oolong tea is a product made from the leaves, buds, and stems of the Camellia sinensis plant. This is the same plant that is also used to make black tea and green tea. The difference is in tSource Organic Oolong Tea Extract from trusted supplier, manufacturer/processor and exporter Naturalin. Available in bulk, private label/OEM and as branded goods and certified USDA Organic.QinMing – Professional oolong tea extract manufacturers and suppliers in China, with bulk plant extracts and herbal medicine raw materials in stock. If you are going to buy or wholesale oolong tea extract made in China, welcome to get free sample from our factory.What is oolong tea. Oolong, a traditional beverage of China, is prepared from the buds, stems, and leaves of Camellia sinensis— the same plant responsible for preparing green and black teas.Developed through the process of partial oxidation, oolong tea comes with a wide range of health benefits because of its high nutritional content.Green Tea, Plant Extract, Herbal Extract manufacturer / supplier in China, offering Green Tea Extract, Black Tea Extract, Oolong Tea Extract, Instant Green Tea, Polyphenols, Factory Supply Paris Polyphylla Extract, Pairs Root Extract, Relieve Pain, Fighting Against Atherosclerosis 95%-98% Quercetin HPLC Quercetin and so on..com offers 105 natural oolong tea leaf extract products. About 16% of these are Herbal Extract, 31% are Tea Extract, and 36% are Other Extracts. A wide variety of natural oolong tea leaf extract options are available to you, such as part, packaging, and form.