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Onion May Offer Protection from Stroke Damage

Posted Aug 11 2012 10:09pm
Posted on Aug. 8, 2012, 6 a.m. in Stroke Functional Foods

Elevated levels of malondialdehyde (MDA), a reactive carbonyl compound that is considered a marker of oxidative stress, are found in the brain affected by stroke.  Soo-Wang Hyun, from Ajou University School of Medicine (Republic of Korea), and colleagues employed a mouse model of stroke to study the effect of onion compounds on brain levels of MDA took the researchers found that animals that consumed a diet including onions maintained activities of key antioxidant enzymes (catalase and glutathione peroxidase), while demonstrating lower levels of MDA. Observing that: "The results from this study demonstrate that onion extract prevents brain edema, [blood-brain barrier] hyperpermeability, and tight junction proteins disruption, possibly through its antioxidant effects,” the study authors conclude that: "This study suggests that onion extract may be a beneficial nutrient for the prevention of [blood-brain barrier] function during brain ischemia.”

Soo-Wang Hyun, Mi Jang, Se Won Park, Eun Joo Kim, Yi-Sook Jung.  “Onion (Allium cepa) extract attenuates brain edema.” Nutrition, 6 July 2012.

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23. Lower Pressure with Potatoes
Potatoes are among the foods richest in potassium, a mineral that fights high blood pressure. One baked potato with skin contains 903 mg of potassium, nearly one-third of the recommended Daily Value. And, in 2005 researchers from the Institute of Food Research (United Kingdom) found that the potato contains natural compounds known as kukoamines, that in an herbal remedy (Lycium chinense) are associated with blood-pressure reducing properties.
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