Sunday, 20 August 2017

Food Therapy: Green Tea, the Best Functional Food for Bone health

Kyle J. Norton, Master of Nutrients
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.

"Let foods be your medicine and let medicines be your food", using foods as medication has been a dream of many scholars and scientists over past many centuries. In order to achieve these, consumption of whole food medicine must accompany with moderated exercise, change of diet and life style.

Evidence from laboratory studies opinionated, regular drinking of green tea improved bone health and reduced risk of osteoporosis and fractures.

Bone health is measured by bone mineral density which has an direct influence in risk of osteoporosis and fractures.

Green tea, a precious drink processes numbers of health benefit known to almost everyone in Asia and Western world. 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. But adding a slice of ginger will benign the problem.

According to Texas Tech University Health Sciences Center, green tea lovers have a reduced risk of lower bone mineral density due to its bioactive components with bone-protective properties.

The study also found that, regular green tea drinking promotes bone health in bone mineral loss menopausal women through increased bone mass, thus reducing risk of osteoporosis, a common disease in aging population.

Furthermore, intake of green also protected early onset of bone mineral loss in obese subjects. 

Other study conducted by the same group of researchers also stated, the bone density protective effect of green tea may involve the bioactive components' effects in decreased risk of fracture by supporting osteoblastic activities while suppressing osteoclastic activities as well as attenuating oxidative stress in promoted healthy levels of bone mineral density.

In postmenopausal osteopenic women study, green tea with optimized dose of polyphenols showed an enhanced osteoprotective efficacy in improved bone mass, microarchitecture integrity, and bone strength observed through the advanced imaging technology.

Dr, Shen CL, the lead author in the studies said, " Tea polyphenols enhance osteoblastogenesis and suppress osteoclastogenesis in vitro" and "Animal studies reveal that intake of tea polyphenols have pronounced positive effects on bone as shown by higher bonemass and trabecular bone volume, number, and thickness and lower trabecular separation via increasing boneformation and inhibition of bone resorption, resulting in greater bone strength".

Promisingly, in a total study of 171 postmenopausal osteopenic women to compare the efficacy of green tea polyphenols (GTP) supplement and/or Tai Chi in risk of osteoporosis, randomly assigned to four groups: (1) placebo (500 mg starch/day), (2) GTP (500 mg GTP/day), (3) placebo + TC (placebo plus TC training at 60 min/session, three sessions/week), and (4) GTP + TC (GTP plus TC training).for 6 months, intake of green and tai chi exercise groups increased bone-specific alkaline phosphatase(bone protective glycoprotein found on the surface of osteoblasts) and improved BAP/(tartrate-resistant acid phosphatase, osteoclast increased risk of bone turnover)/TRAP ratio.

Additionally, group received also green tea showed a significant improved muscle strength in postmenopausal women with osteopenia.

Taking together, green tea may be served as functional food to protect bone mineral density in all people with/ without risk of osteoporosis.

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(1) Green tea and bone health: Evidence from laboratory studies by Shen CL1, Yeh JK, Cao JJ, Chyu MC, Wang JS.(PubMed)
(2) Green tea and bone metabolism by Shen CL1, Yeh JK, Cao JJ, Wang JS.(PubMed)
(3) Tea and bone health: steps forward in translational nutrition by Shen CL1, Chyu MC, Wang JS.(PubMed)
(4) Effect of green tea and Tai Chi on bone health in postmenopausal osteopenic women: a 6-month randomized placebo-controlled trial by Shen CL1, Chyu MC, Yeh JK, Zhang Y, Pence BC, Felton CK, Brismée JM, Arjmandi BH, Doctolero S, Wang JS.(PubMed)

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