Wu-long Tea Research
Looking for wu-long tea research to sort the fact from fiction? That's smart! There are companies out there making claims of substantial weight loss and touting many other health benefits of wulong, so it's a good idea to do a little of your own research to help you make a well-informed decision.
Remember, wu-long's real name is oolong, so the studies below reference the scientific name and not the marketing name.
If you're not into reading technical journal articles, our wu-long tea page distills the findings of the first two studies listed below.
 
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 CLINICAL CARE/EDUCATION/NUTRITION: Kazuaki Hosoda, Ming-Fu Wang, Mei-Ling Liao, Chin-Kuang Chuang, Miyuki Iha, Beverly Clevidence, and Shigeru Yamamoto Antihyperglycemic Effect of Oolong Tea in Type 2 Diabetes Diabetes Care, Jun 2003; 26: 1714 - 1718.  ......Nutrition
Antihyperglycemic Effect of Oolong Tea in Type 2
Diabetes Address correspondence...OBJECTIVE-To determine the efficacy
of oolong tea for lowering plasma glucose in...the
present study. Subjects consumed oolong tea (1,500
ml) or water for 30 days...... |
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 HUMAN NUTRITION AND METABOLISM: William Rumpler, James Seale, Beverly Clevidence, Joseph Judd, Eugene Wiley, Shigeru Yamamoto, Tatsushi Komatsu, Tetsuya Sawaki, Yoshiyuki Ishikura, and Kazuaki Hosoda Oolong Tea Increases Metabolic Rate and Fat Oxidation in Men J. Nutr., Nov 2001; 131: 2848 - 2852. ......Human
Nutrition and Metabolism Oolong Tea Increases
Metabolic Rate and Fat...According to traditional Chinese belief, oolong
tea is effective in the control of...is gaining scientific merit (1 ). Oolong
tea is one of the three types of tea...... |
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 Hiroyasu Iso, Chigusa Date, Kenji Wakai, Mitsuru Fukui, Akiko Tamakoshi and the JACC Study Group* The Relationship between Green Tea and Total Caffeine Intake and Risk for Self-Reported Type 2 Diabetes among Japanese Adults Ann Intern Med, Apr 2006; 144: 554 - 562. ......risk
for diabetes. Drinking black or oolong teas was not
associated with the risk...however, the effect of green, black, and oolong
teas is unclear. Objective To examine...consumption of coffee; black,
green, and oolong teas; and physician-diagnosed
diabetes...... |
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 REVIEWS: Carmen Cabrera, Reyes Artacho, and Rafael Giménez Beneficial Effects of Green Tea—A Review J. Am. Coll. Nutr., Apr 2006; 25: 79 - 99. ......contains
more catechins than black or oolong teas. The
strong antioxidant potential...more catechins, than black tea or oolong
tea. Catechins are in vitro and in...oxidation occurs); semi-fermented oolong
tea (produced when the fresh leaves...... |
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BIOCHEMICAL AND MOLECULAR ACTION OF NUTRIENTS: Lai Kwok Leung, Yalun Su, Ruoyun Chen, Zesheng Zhang, Yu Huang, and Zhen-Yu Chen Theaflavins in Black Tea and Catechins in Green Tea Are Equally Effective Antioxidants J. Nutr., Sep 2001; 131: 2248 - 2251. ......during
the manufacture of black tea and oolong tea to form
orange-red pigments, theaflavins...polyphenol pigments found in both
black and oolong teas. TF are formed from
polymerization...during the manufacture of black or oolong
tea (2) . TF contribute to the characteristic...... |
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 VITAMINS, MINERALS, AND PHYTOCHEMICALS: Tomonori Nagao, Yumiko Komine, Satoko Soga, Shinichi Meguro, Tadashi Hase, Yukitaka Tanaka, and Ichiro Tokimitsu Ingestion of a tea rich in catechins leads to a reduction in body fat and malondialdehyde-modified LDL in men Am. J. Clinical Nutrition, Jan 2005; 81: 122 - 129. ......which
the subjects ingested 1 bottle oolong tea/d
containing 690 mg catechins...extract group; n 17) or 1 bottle oolong
tea/d containing 22 mg catechins...preparation of the test beverage, 9
g oolong tea leaves underwent extraction with...... |
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SUPPLEMENT: PROCEEDINGS OF THE THIRD INTERNATIONAL SCIENTIFIC SYMPOSIUM ON TEA AND HUMAN HEALTH: Gary R. Beecher Overview of Dietary Flavonoids: Nomenclature, Occurrence and Intake J. Nutr., Oct 2003; 133: 3248S - 3254S. ......and
found primarily in black and oolong teas.
Flavonoids are widely distributed...subsequent processing into foods,
e.g., oolong and black teas, red wines and
coffee...derived tannins. Of importance to oolong
and black teas are the flavanol-derived...... |
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 COMPLEMENTARY AND ALTERNATIVE MEDICINE: Anne Marie Whelan, Tannis M Jurgens, and Susan K Bowles Natural Health Products in the Prevention and Treatment of Osteoporosis: Systematic Review of Randomized Controlled Trials Ann. Pharmacother., May 2006; 40: 836 - 849. ......vitamin
D; and black, green, and oolong tea did not meet
study criteria...randomized controlled trials were found for oolong,
black, or green tea. Randomized controlled...racemosa) 18. Folic acid
33. Oolong tea 4. Black pepper 19...... |
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 ORIGINAL INVESTIGATIONS: Yi-Ching Yang, Feng-Hwa Lu, Jin-Shang Wu, Chih-Hsing Wu, and Chih-Jen Chang The Protective Effect of Habitual Tea Consumption on Hypertension Archives of Internal Medicine, Jul 2004; 164: 1534 - 1540. ......Habitual
moderate strength green or oolong tea consumption,
120 mL/d or more...the kind of tea (green, black, or oolong),
milk or sugar addition, and the...tea drinkers, 96.3% were green or oolong
tea drinkers and only 4.8% had the...... |
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AGING: Shinichi Kuriyama, Atsushi Hozawa, Kaori Ohmori, Taichi Shimazu, Toshifumi Matsui, Satoru Ebihara, Shuichi Awata, Ryoichi Nagatomi, Hiroyuki Arai, and Ichiro Tsuji Green tea consumption and cognitive function: a cross-sectional study from the Tsurugaya Project 1 Am. J. Clinical Nutrition, Feb 2006; 83: 355 - 361. ......P
for trend 0.33) for black or oolong tea and 1.00
(reference), 1.16 (95...consumption of green tea, black or oolong
tea, and coffee and cognitive function...of 5 beverages (green tea,
black or oolong tea, coffee, cola or juice, 100
fresh...... |
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