MASCO Corporation

HEALTH and WELLNESS

Repeated tea consumption may be caused by plasma and lipoprotein levels of tea catechins.

Abstract

Background:
Epidemiological studies suggest that antioxidant flavonoids in tea may reduce the risk of cardiovascular disease, possibly via protection of low-density lipoproteins (LDL) against oxidation. However, the extent of absorption of tea flavonoids and their accumulation in LDL during regular consumption of tea is not clear. Therefore we investigated plasma and lipoprotein levels of catechins during tea consumption and the impact on LDL oxidizability ex vivo.

Methods:

Eighteen healthy adults consumed, in an incomplete balanced cross-over design, green tea, black tea, black tea with milk or water, one cup every 2 hr (eight cups/day) for three days. Blood samples were obtained in the mornings and evenings of each day. Plasma total catechin concentration was determined in all blood samples, and the distribution of catechins among lipoproteins was determined at the end of the third day (t = 60 hr). The resistance of LDL to copper-induced oxidation ex vivo was assessed before tea consumption and at t = 60 hr. Repeated tea consumption during the day rapidly increased plasma total catechin levels whereas they declined overnight when no tea was consumed. There was a gradual increase in plasma levels in the mornings (respectively, 0.08 microM vs. 0.20 microM on first and last day of black tea consumption) and evenings (respectively, 0.29 microM vs. 0.34 microM on first and last day of black tea consumption).

Results:

Green tea catechins were mainly found in the protein-rich fraction of plasma (60%) and in high-density lipoproteins (23%). Although present in LDL, the concentration of catechins in LDL was not sufficient to enhance the resistance of LDL to oxidation ex vivo. Addition of milk to black tea did not affect any of the parameters measured.

Conclusion:

In conclusion, the present study shows that catechin levels in blood rapidly increase upon repeated tea consumption. The accumulation of catechins in LDL particles is not sufficient to improve the intrinsic resistance of LDL to oxidation ex vivo.

Archives

Management Info:

Designed By: Storyberry Corporation

Powered By: Google Inc.

Privacy Policy: JDF Corporation

Terms of Use: BPF Corporation

Merchant Processor: Donation

RSS Health Topics

  • Nutrition – Facts | Health | Definition Terms
    NUTRITION. Food is comprised of nutrients that are classified by their role in the body: the energy-yielding macronutrients (carbohydrates, protein, and fat), the essential micronutrients (vitamins, minerals, and water), and numerous … Continue reading →
  • VARICOSE VEINS
    Definition Varicose veins are dilated, tortuous, elongated superficial veins that are usually seen in the legs. Description Varicose veins, also called varicosities, are mostly often on the legs, although they can be found in other parts of the body. Mostly they appear as lumpy, winding vessels just below the surface of the skin. There are three types of vei […]
  • Coronary Heart Disease – Diagnosis and Treatments
    Coronary Heart Disease Methods of Diagnosis Your healthcare provider diagnoses coronary artery disease (atherosclerosis) based on your medical and family histories, a physical exam, or results from the following tests. … Continue reading →
  • Cryotherapy
    Cryotherapy Definition Cryotherapy is a technique that uses an extremely cold liquid or instrument to freeze and destroy abnormal skin cells that require removal. It is a freezing substance or … Continue reading →
  • Exercise Therapy
      Exercise Therapy Definition Exercises is physical activity that is planned, structured and repetitive for the purpose of conditioning any part of the body. Exercise is utilized to improve health, … Continue reading →

Categories

Stat Counter

Hours & Info

+1-313-2747400 (Phone) +1-313-7924177 (Fax)
Lunch Break: 11am - 1pm

Other Phone Number(s)

+1-763-416-0228

RSS MASCO Construction

%d bloggers like this: