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Li Shan Oolong tea

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Oolong Tea Health Benefits

Since Oolong tea and green tea are produced from the same plant, they share many of the same health benefits. However, Oolong has most of the green tea benefits plus more. Studies have shown that drinking Oolong tea can:

  • Aid weight loss
  • fight cancer
  • lower cholesterol
  • boost immune system
  • reduce the risk of heart disease
  • reduce high blood pressure
  • complement diabetes treatment
  • stimulate metabolism
  • prevent dental decay
  • strengthen capillaries
  • ease arthritis pain
  • improve mental focus
  • inhibit Alzheimer's disease
  • fight infection
  • improve skin health
  • increase bone density
  • improve memory


Oprah recommends drinkingOolong to lose weight    O-magazine recommends Oolong    rachael ray drinks Oolong



Oprah discusses the benefits of Oolong tea in her October 2006 O-Magazine and on her November 10th show with Dr Perricone. Rachael Ray also drinks Oolong tea to keep the weight off.

Oolong tea and weight loss

There is so much interest in weight loss and Oolong tea. A great deal of research has been conducted to find the connection between weight loss and Oolong tea. Caffeine is a stimulant. It is commonly known that the caffeine in tea increases metabolism, therefore increases energy consumption. So the question becomes is it only the caffeine or are there other compounds in the tea contributing to that increase in metabolism? The following 2 studies provide some evidence.

1. Oolong tea vs Caffeinated Water

Physiologist William Rumpler of the USDA's Agricultural Research Service (published in the December 2001 issue of the Journal of Nutrition), found that
  • Energy expenditure (EE) increased by 2.9 percent among men ages 25 to 60 years old who drank full strength Oolong tea and 3.4 percent among men who received caffeinated water.
  • Participants burned an average of 67 more calories per day when drinking the full strength Oolong tea.
  • Participants increased fat oxidation (fat burning) by 12% after consuming the full strength Oolong tea versus the caffeinated water.
The researchers concluded that an unclear compound in Oolong tea, other than the caffeine, increases fat oxidation and may help to promote weight loss.

2. Oolong tea vs Green tea

T. Komatsu, of the University of Tokushima School of Medicine in Japan, studied the effects of Oolong tea on EE compared with the effects of green tea in eleven Japanese women. Results (published in the 2003 issue of the Journal of Medical Investigation) indicated that EE increased by 10 percent among those who consumed Oolong tea and 4 percent among those who consumed green tea.

Komatsu concluded that in comparison with green tea, Oolong tea contained approximately half the caffeine and epigallocatechin galate, while polymerized polyphenols were double. These results suggest that Oolong tea increases EE by its polymerized polyphenols.

Research References

Kenichi Yanagimoto, Hirotomo Ochi, Kwang-Geun Lee, and Takayuki Shibamoto (2003). Antioxidative Activities of Volatile Extracts from Green Tea, Oolong Tea, and Black Tea. J. Agric. Food Chem., 51 (25), 7396 -7401.

Uehara M, Sugiura H, Sakurai K (2001). A trial of oolong tea in the management of recalcitrant atopic dermatitis. Arch Dermatol. 2001 Jan;137(1):42-3.

Kazuaki Hosoda, Ming-Fu Wang, Mei-Ling Liao, Chin-Kuang Chuang, Miyuki Iha, Beverly Clevidence, and Shigeru Yamamoto (2003). Antihyperglycemic Effect of Oolong Tea in Type 2 Diabetes. Diabetes Care 26:1714-1718, 2003.

Yang YC et all (2004). The protective effect of habitual tea consumption on hypertension. Archives of Internal Medicine 164:1534-1540.

K Nakahara, S Kawabata, H Ono, K Ogura, T Tanaka, T Ooshima, and S Hamada (1993). Inhibitory effect of oolong tea polyphenols on glycosyltransferases of mutans Streptococci. Appl Environ Microbiol. 1993 April; 59(4): 968973.

Shimada K, Kawarabayashi T, Tanaka A, Fukuda D, Nakamura Y, Yoshiyama M, Takeuchi K, Sawaki T, Hosoda K, Yoshikawa J. (2004). Oolong tea increases plasma adiponectin levels and low-density lipoprotein particle size in patients with coronary artery disease. Diabetes Res Clin Pract. 2004 Sep;65(3):227-34.


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