Regular drinking of green tea may have a potential effect on maintaining normal blood pressure and reducing the risk of hypertension, a recent study suggested.
Hypertension is abnormally high blood pressure, one of the major risk factors in contributed early onset of cardiovascular disease.
Green tea, considered as a functional food, linking a number of health benefits has been reported by several renowned research and studies. However, as yin in nature herbal medicine ,or food, long term injection of large amounts may obstruct the balance of yin-yang, induced "yin excessive syndrome" or "yang vacuity syndrome" including weakened immunity and painful case of GERD,... according to traditional Chinese medicine's Yin-Yang theory. Adding one slice of ginger will do the trick of neutralization.
Hypertension of male Wistar rats induced by the nitric oxide synthase inhibitor [N-nitro-L-arginine-methyl-ester (L-NAME); 20 mg/kg per day, orally, for 2 weeks], fed with green tea extract exhibited a strong effect in reduced hypertension (119 ± 1 mmHg) and higher renal sympathetic nerve activity (161 ± 12 spikes/s) than the control group (97 ± 2 spikes/s).
Green tea oral administration also showed a significant decrease in hypertensive parameters by amelioration. arterial baroreceptor function and vascular and systemic oxidative stress.
Furthermore, a total of 20 Otsuka Long-Evans Tokushima Fatty (OLETF) rats at 13 weeks old with metabolic syndrome were randomized into a saline-treated group (OLETF; n = 10) and a group treated with decaffeinated-GTE (25 mg/kg/day) (GTE-OLETF; n = 10), group fed with decaffeinated-GTE significantly reduced BP (OLETF vs. GTE-OLETF; 130 ± 7 vs. 121 ± 3 mmHg, p = 0.01) in compared control fed with saline.
The study also suggested that fed mice with green tea also showed an anti-hypertensive effect in reduced vascular reactive oxygen species (ROS) formation and NADPH in the generation of ROS, as well as improving endothelium (cell lines the interior surface of blood vessels and lymphatic vessels)and lymphatic vessels dependent relaxation.
Dr. Ihm SH, the lead author said," (green tea extract) improved endothelial dysfunction and IR, and eventually lowered BP".
Taking together, there is no doubt that green tea processes a significant effect in reduced risk and treatment of hypertension through reduced oxidative stress and improved vascular relaxation as well as decreased metabolic syndrome in exaggerated hypertension.
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Author Biography
Kyle J. Norton, Master of Nutrients
Health article writer and researcher; Over 10.000 articles and research papers have been written and published online, including worldwide health, ezine articles, article base, healthblogs, selfgrowth, best before it's news, the Karate GB Daily, etc.,.
Named TOP 50 MEDICAL ESSAYS FOR ARTISTS & AUTHORS TO READ by Disilgold.com Named 50 of the best health Tweeters Canada - Huffington Post
Nominated for shorty award over last 4 years
Some articles have been used as references in medical research, such as international journal Pharma and Bio Science, ISSN 0975-6299.
Sources
(1) The antioxidant effects of green tea reduce blood pressure and sympathoexcitation in an experimental model of hypertension by Garcia ML1, Pontes RB, Nishi EE, Ibuki FK, Oliveira V, Sawaya AC, Carvalho PO, Nogueira FN Franco MD, Campos RR, Oyama LM, Bergamaschi CT. (PubMed)
(2) Decaffeinated green tea extract improves hypertension and insulin resistance in a rat model of metabolic syndrome by Ihm SH1, Jang SW, Kim OR, Chang K, Oak MH, Lee JO, Lim DY, Kim JH.(PubMed)
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