Blood pressure is the force of blood pushing against the walls of the arteries as the heart pumps out blood and change constantly depending on activity. However, persistent hypertension due to poor management over time can lead to diabetes and cardiovascular disease.
According to the statistics provided by the American Heart Association., nearly half of all adults in the United States are living with high blood pressure or 1 in 3 American are hypertensive.
Hypertension is leading risk factors of heart disease and stroke that cause most death in the US
Most common prevalent factors associated with the condition onset are family history, aging, being male, being overweight or obese, ethnicity, physical inactivity, unhealthy diet and medical condition such as chronic kidney disease.
Believe or not, excessive alcohol drinking is also one of the major causes besides obesity in elevating the syndrome onset.
Depending on the levels of blood pressure, most people with mild hypertension are assymptomatic. However, unmanaged high blood pressure can induce complication of heart attack or stroke, heart failure, weakened and narrowed blood vessels, metabolic syndrome and trouble with memory or understanding,
In severe cases, chronic hypertension can lead to dementia.
Conventionally, blood pressure medications have been found to prevent many deaths from heart disease and stroke over the past 30 years, however, long-term intake of such medications have caused many side effects such as damaging the kidney.
Some researchers suggested by making changes to lifestyle, maintaining ideal weight and diet with low salt, you could do just fine without the drugs.
Dr. Myung Hwa Yang wrote, "a healthy eating, weight management, and appropriate physical activity are essential for the management of high blood pressure in adults since these lifestyle managements have the potential to improve blood pressure control and even reduce the need for medication.23)"
And "Our findings indicate that to achieve better rates of blood pressure control, the clinician should advise lifestyle modifications such as adequate physical activity and low salt intake, in addition to prescribing medication and monitoring the patient for hypertension control".
The onion is a plant in the genus Allium, belonging to the family Alliaceae, a close relation of garlic. It is often called the "king of vegetables" because of its pungent taste and found in a large number of recipes and preparations spanning almost the totality of the world's cultures.
Depending on the variety, an onion can be sharp, spicy, tangy, pungent, mild or sweet.
On finding a potent ingredient which processes cardioprotection researchers examined the effects of onion on blood pressure in N(G)-nitro-L-arginine methyl ester (L-NAME) induced-hypertensive rats and stroke-prone spontaneously hypertensive rats (SHRSP).
The vivo study included male 6-weeks-old Sprague-Dawley rats induced-hypertensive to receive tap water containing L-NAME of a concentration of 50 mg/kg BW/day and dried onion at 5%.
Onion application showed significant anti-hypertensive activity on the L-NAME induced-hypertensive rats and the SHRSP by decreasing the thiobarbituric acid reactive substances (TBARS) associated with lipid peroxidation in blood plasma.
Furthermore, nitrate/nitrite (products of nitric oxide (NO)) involved in blood vessel relaxation excreted in urine and the NO synthase (NOS) associated with vascular tone activity in the kidneys in SHRSP were also increased by the onion injection.
Interestingly, the efficacy of onion that inhibits the onset of high blood pressure was not found similar to those in the L-NAME induced hypertensive rats such as increasing the levels of NOS.
More precisely, onion promoted hypotension in L-NAME treated rat without inhibiting of NOS activity by L-NAME, and decreased nitrate/nitrite excretion in urine may be associated with only the promotion of antioxidants activity
Dr. Sakai Y, the lead scientists said, "The mechanism of the antihypertensive effect of onion probably involves increased saving of NO by the antioxidative activity of onion in L-NAME induced-hypertensive rats".
Taken altogether, onion may be considered a remedy for the prevention and treatment of hypertension, pending to the confirmation of the larger sample size and multicenter human study.
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Author Biography
Kyle J. Norton (Scholar, Master of Nutrition, All right reserved)
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, health blogs, self-growth, 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 Bioscience, ISSN 0975-6299.
Sources
(1) Antihypertensive effects of onion on NO synthase inhibitor-induced hypertensiverats and spontaneously hypertensive rats by Sakai Y1, Murakami T, Yamamoto Y. (PubMed)
(2) Effects of boiling on the antihypertensive and antioxidant activities of onion by Kawamoto E1, Sakai Y, Okamura Y, Yamamoto Y. (PubMed)
(3) The Effect of Lifestyle Changes on Blood Pressure Control among Hypertensive Patients by Myung Hwa Yang,1 Seo Young Kang,1 Jung Ah Lee,1 Young Sik Kim,
1 Eun Ju Sung,2Ka-Young Lee,3 Jun-Su Kim,3 Han Jin Oh,4 Hee Chul Kang,5 and Sang Yeoup Lee. (PMC)
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