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http://hk.news.yahoo.com/美研究-可樂薯條加快...iBnummlumggQRwdANzZWN0aW9ucwR0ZXN0Aw--;_ylv=3
美研究﹕可樂薯條加快腦退化
明報明報 – 19小時前
【明報專訊】美國醫學期刊Neurology刊登一項研究指出，可樂、薯條等加工食物會加速大腦退化，相反含維他命的食物和魚則能延緩大腦萎縮，有助預防腦退化症。
本港腦科專家認為，研究有參考價值，有助日後深入研究腦患病風險。
含維他命食物緩腦萎縮
美國奧勒崗健康與科學大學早前分析了104名、平均87歲的健康老人與腦退化症患者的血液樣本，並在上周公布結果。結果發現，健康長者的血液中，擁有較多Omega-3不飽和脂肪酸與維他命B、C、D和E，他們在記憶力和思維測試中表現較佳，反應能力也較好。相反，腦退化症患者血液則有較多反式不飽和脂肪酸，最常見於加工食品，如蛋糕和油炸食物。
研究人員隨後掃描42名老人的大腦。結果顯示，血液中維他命和Omega-3不飽和脂肪酸水平高的長者大腦容量更大，相反血液中反式脂肪高多的長者大腦容量小。
指反式脂肪損心臟大腦
研究員認為，反式脂肪不僅有損心臟，亦損大腦，建議大眾可從調整飲食結構，延緩大腦萎縮，保持思維敏捷。英國腦退化症研究中心表示，數據可看到血液中的營養物質和腦退化症相關，但實際影響程度則需更深入研究，才能確定飲食是否對病症有幫助。
港大內科學系腦內科教授張德輝表示，已有研究確認中風和腦損傷會增加腦退化風險，而反式不飽和脂肪酸亦會增加血管風險，造成如發炎等腦損傷。但他認為，研究如以追蹤模式進行會較準確，長者或會因本身出現病患、減少運動，或會因照顧者提供食物不健康，影響研究結果。
香港營養師協會會長林思為表示，長期進食加工食物會令進食健康食物的機會減少，本港有近八成市民經常出外午餐，會增加進食加工食物風險，建議多吃蔬果平衡。
http://www.oh-yay.com/studies-find-high-fat-diets-damage-the-brain-8812712.html
American News Report
Studies Find High Fat Diets Damage the Brain
by Pat Anson on January 3, 2012
High fat diets cause changes in the brain associated with obesity and Alzheimer’s disease.
Two new studies show how high fat diets can damage your brain – and make it harder for you to keep a New Year’s resolution to lose weight.
Researchers in Oregon found that elderly people with high levels of vitamins and omega 3 fatty acids in their blood had better performance on mental acuity tests and less of the brain shrinkage associated with Alzheimer’s disease. Junk food diets produced just the opposite result.
The research was done by scientists from the Oregon Health and Science University in Portland, Ore., and the Linus Pauling Institute at Oregon State University. It was published in Neurology, the medical journal of the American Academy of Neurology.
The study found positive effects from high levels of vitamins B, C, D, E and healthy oils commonly found in fish. Consistently worse cognitive performance was associated with a high intake of trans-fats found in fried food, frozen food, margarine and baked goods. People with diets high in trans-fats were more likely to have brain shrinkage and lower scores on thinking and memory tests.
“These findings are based on average people eating average American diets,” said Maret Traber, a co-author of the study and a principal investigator with the Linus Pauling Institute “If anyone right now is considering a New Year’s resolution to improve their diet, this would certainly give them another reason to eat more fruits and vegetables. I’m a firm believer these nutrients have strong potential to protect your brain and make it work better.”
The small study was done with 104 elderly people, with an average age of 87. It tested 30 different nutrient biomarkers in their blood. About half the participants had MRI scans to measure their brain volume.
“These results need to be confirmed, but obviously it is very exciting to think that people could potentially stop their brains from shrinking and keep them sharp by adjusting their diet,” said study co-author Gene Bowman of the Oregon Health & Science University in Portland, who is also a member of the American Academy of Neurology.
Meanwhile, researchers at the University of Washington found that obesity in rodents and humans causes structural changes in the brain, making it harder for them to lose weight permanently through diet and exercise.
The study, reported online in the Journal of Clinical Investigation, looked at what high-fat diets did to the brains of mice and rats. They found that the rodents quickly developed inflammation in the hypothalamus, a small part of the brain that regulates appetite and body weight. Using brain scans, the researchers found similar inflammation in the same area of the brains of obese humans:
“That was quite a shock,” said senior author Dr. Michael W. Schwartz, professor of medicine at the University of Washington’s Diabetes and Obesity Center. “This might reflect fundamental biological changes in how the brain works that help explain why it’s so hard to keep weight off.”
It doesn’t take much to trigger those changes. Researchers reported seeing changes in the brain after just one day on a fatty diet.
© Copyright American News Report 2011, 2012
美研究﹕可樂薯條加快腦退化
明報明報 – 19小時前
【明報專訊】美國醫學期刊Neurology刊登一項研究指出，可樂、薯條等加工食物會加速大腦退化，相反含維他命的食物和魚則能延緩大腦萎縮，有助預防腦退化症。
本港腦科專家認為，研究有參考價值，有助日後深入研究腦患病風險。
含維他命食物緩腦萎縮
美國奧勒崗健康與科學大學早前分析了104名、平均87歲的健康老人與腦退化症患者的血液樣本，並在上周公布結果。結果發現，健康長者的血液中，擁有較多Omega-3不飽和脂肪酸與維他命B、C、D和E，他們在記憶力和思維測試中表現較佳，反應能力也較好。相反，腦退化症患者血液則有較多反式不飽和脂肪酸，最常見於加工食品，如蛋糕和油炸食物。
研究人員隨後掃描42名老人的大腦。結果顯示，血液中維他命和Omega-3不飽和脂肪酸水平高的長者大腦容量更大，相反血液中反式脂肪高多的長者大腦容量小。
指反式脂肪損心臟大腦
研究員認為，反式脂肪不僅有損心臟，亦損大腦，建議大眾可從調整飲食結構，延緩大腦萎縮，保持思維敏捷。英國腦退化症研究中心表示，數據可看到血液中的營養物質和腦退化症相關，但實際影響程度則需更深入研究，才能確定飲食是否對病症有幫助。
港大內科學系腦內科教授張德輝表示，已有研究確認中風和腦損傷會增加腦退化風險，而反式不飽和脂肪酸亦會增加血管風險，造成如發炎等腦損傷。但他認為，研究如以追蹤模式進行會較準確，長者或會因本身出現病患、減少運動，或會因照顧者提供食物不健康，影響研究結果。
香港營養師協會會長林思為表示，長期進食加工食物會令進食健康食物的機會減少，本港有近八成市民經常出外午餐，會增加進食加工食物風險，建議多吃蔬果平衡。
http://www.oh-yay.com/studies-find-high-fat-diets-damage-the-brain-8812712.html
American News Report
Studies Find High Fat Diets Damage the Brain
by Pat Anson on January 3, 2012
High fat diets cause changes in the brain associated with obesity and Alzheimer’s disease.
Two new studies show how high fat diets can damage your brain – and make it harder for you to keep a New Year’s resolution to lose weight.
Researchers in Oregon found that elderly people with high levels of vitamins and omega 3 fatty acids in their blood had better performance on mental acuity tests and less of the brain shrinkage associated with Alzheimer’s disease. Junk food diets produced just the opposite result.
The research was done by scientists from the Oregon Health and Science University in Portland, Ore., and the Linus Pauling Institute at Oregon State University. It was published in Neurology, the medical journal of the American Academy of Neurology.
The study found positive effects from high levels of vitamins B, C, D, E and healthy oils commonly found in fish. Consistently worse cognitive performance was associated with a high intake of trans-fats found in fried food, frozen food, margarine and baked goods. People with diets high in trans-fats were more likely to have brain shrinkage and lower scores on thinking and memory tests.
“These findings are based on average people eating average American diets,” said Maret Traber, a co-author of the study and a principal investigator with the Linus Pauling Institute “If anyone right now is considering a New Year’s resolution to improve their diet, this would certainly give them another reason to eat more fruits and vegetables. I’m a firm believer these nutrients have strong potential to protect your brain and make it work better.”
The small study was done with 104 elderly people, with an average age of 87. It tested 30 different nutrient biomarkers in their blood. About half the participants had MRI scans to measure their brain volume.
“These results need to be confirmed, but obviously it is very exciting to think that people could potentially stop their brains from shrinking and keep them sharp by adjusting their diet,” said study co-author Gene Bowman of the Oregon Health & Science University in Portland, who is also a member of the American Academy of Neurology.
Meanwhile, researchers at the University of Washington found that obesity in rodents and humans causes structural changes in the brain, making it harder for them to lose weight permanently through diet and exercise.
The study, reported online in the Journal of Clinical Investigation, looked at what high-fat diets did to the brains of mice and rats. They found that the rodents quickly developed inflammation in the hypothalamus, a small part of the brain that regulates appetite and body weight. Using brain scans, the researchers found similar inflammation in the same area of the brains of obese humans:
“That was quite a shock,” said senior author Dr. Michael W. Schwartz, professor of medicine at the University of Washington’s Diabetes and Obesity Center. “This might reflect fundamental biological changes in how the brain works that help explain why it’s so hard to keep weight off.”
It doesn’t take much to trigger those changes. Researchers reported seeing changes in the brain after just one day on a fatty diet.
© Copyright American News Report 2011, 2012
