Regular drinking of green tea may have a potential effect in maintaining normal blood pressure and reduced risk of hypertension , a recent study suggested.
Hypertension is abnormal high of blood pressure, one of the major risk factor in contributed early onset of cardiovascular disease.
Green tea, considered as a functional food, linking numbers of health benefit 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 weaken 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 decreased in hypertensive parameter by ameliorated.arterial baroreceptor function and vascular and systemic oxidative stress.
Furthermore, in a total of 20 Otsuka Long-Evans Tokushima Fatty (OLETF) rats at 13 weeks old with matabolic syndrome 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 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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Health article writer and researcher; Over 10.000 articles and research papers have been written and published on line, including world wide health, ezine articles, article base, healthblogs, selfgrowth, best before it's news, the karate GB daily, etc.,.
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Some articles have been used as references in medical research, such as international journal Pharma and Bio science, ISSN 0975-6299.
(1) The antioxidant effects of green tea reduces 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)