Navigation Links
Low-Carb, High-Fat Diets May Not Pose Risk to Arteries
Date:6/2/2011

By Kathleen Doheny
HealthDay Reporter

THURSDAY, June 2 (HealthDay News) -- New research suggests that low-carbohydrate diets, with regular exercise as part of the plan, don't appear to harm the arteries, as some experts have feared.

"It's pretty clear low-carb is effective for weight loss," said study author Kerry J. Stewart, director of clinical and research exercise physiology at the Johns Hopkins University School of Medicine and its Heart and Vascular Institute. "The concern has been that because you are eating more fat this is going to put stress on your blood vessels."

So, Stewart and his team evaluated the short-term effects of a low-carb, higher-fat diet after a single meal. The researchers also compared a low-carb diet with a low-fat diet in dieters. In each case, they found no ill effects on blood vessel health.

Stewart is due to present his findings Friday at the American College of Sports Medicine meeting in Denver.

However, one nutrition expert said longer-term research is needed before concluding that high fat intake doesn't hurt blood vessel health.

For the first study, Stewart's team looked at the effects of eating an extremely high-fat McDonald's breakfast. The breakfast had more than 900 calories and 50 grams of fat. "That's half of what you should eat in a whole day," Stewart said.

The researchers then evaluated a marker of arterial stiffness and another measure of blood vessel health, known as endothelial function. "Even after eating this one meal, we didn't find any vascular changes from before to after," he said.

The arterial stiffness, in fact, improved, he noted, although he is not sure why.

Neither study had industry funding; both were financed by the U.S. National Heart, Lung, and Blood Institute.

For the diet study, Stewart assigned 55 men and women who were overweight or obese to the low-carb diet or a low-fat diet. They also had abdominal obesity and a large waist circumference (35 inches or more for women, 40 or more for men). Both are risk factors for heart disease.

The low-carb plan included up to 55 percent fat at the beginning, and phased down to about 40 percent. It had about 15 percent carbs initially, and then went to 40 percent. The other dieters followed the American Heart Association's low-fat diet, with no more than 30 percent fat a day.

Both groups had supervised exercise three times a week.

At the meeting, Stewart will report on 46 dieters, 23 from each group, who lost 10 pounds. "In the low-carb group, they reached the 10-pound loss at 45 days," he said. The low-fat group needed 70 days to shed 10 pounds.

Their calorie intake was similar, whichever diet they were on.

Stewart performed the same blood vessel measures as in the breakfast study. "There were no differences in any of the vascular measures," he said.

The researchers will continue the study for six months. While Stewart cautioned that these are initial findings, he added, "We are pretty confident this is a real result. At the 10-pound weight-loss mark, we don't see any harm to the vasculature."

Stewart said he put on weight a few years ago, went on a low-carb plan while also exercising and dropped 40 pounds. He has kept if off for four years.

While the study is intriguing, long-term research is crucial, said Connie Diekman, director of university nutrition at Washington University in St. Louis and past president of the American Dietetic Association.

"When it comes to the impact on blood vessel functioning, as a registered dietitian I would like to see more studies in healthy and unhealthy subjects and longer-duration studies before concluding that this high-fat intake does not impact blood vessel health," she said, although the study does show that exercise is important. The breakfast study, with its one-time test, does not provide much information about what impact these diets will have long-term, she added.

More information

To learn more about losing weight, visit the U.S. Centers for Disease Control and Prevention.

SOURCES: Kerry J. Stewart, Ed.D., professor, medicine, and director, clinical and research exercise physiology, Johns Hopkins University School of Medicine, and Heart and Vascular Institute, Baltimore; Connie Diekman, R.D., director, university nutrition, Washington University, St. Louis; June 3, 2011, presentation, American College of Sports Medicine annual meeting, Denver


'/>"/>
Copyright©2010 ScoutNews,LLC.
All rights reserved  

Related medicine news :

1. Low-carb, higher-fat diets add no arterial health risks to obese people seeking to lose weight
2. High-fat diet during pregnancy programs child for future diabetes
3. Study reinforces link between obesity, high-fat meals and heart disease
4. Greater obesity in offspring of nursing mothers consuming a high-fat diet
5. A high-fat diet alters crucial aspects of brain dopamine signaling
6. High-fat ketogenic diet effectively treats persistent childhood seizures
7. High-Fat Meal May Trigger Asthma
8. High-fat ketogenic diet to control seizures is safe over long term
9. Could Extreme Low-Cal Diets Bring Longer, Healthier Life?
10. Diets Rich in Vitamin B May Help Prevent PMS, Study Finds
11. Yo-yo effect of slimming diets explained
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Low-Carb, High-Fat Diets May Not Pose Risk to Arteries
(Date:2/27/2017)... Sedona, Arizona (PRWEB) , ... February 27, 2017 ... ... Premier Center for Shamanic Healing and Spiritual Awakening, is happy to announce ... reboot for mind and body, these individual customized retreats offer the winter-weary soul ...
(Date:2/27/2017)... TN (PRWEB) , ... February 27, 2017 , ... The ... Clayton went to work for a company involved in the underground testing of nuclear ... In “Dying for Answers: Expendable Workers of the Cold War Nuclear Testing,” Clayton exposes ...
(Date:2/27/2017)... Orange County, CA (PRWEB) , ... February 27, 2017 , ... ... for periodontitis. Periodontitis is a chronic inflammatory gum condition that occurs when the bacteria ... of deep cleaning, also referred to as a scaling and root planing or SRP, ...
(Date:2/27/2017)... ... February 26, 2017 , ... Miro is the ultimate smart media center ... brings songs, movies, TV shows and much more apps for user exploration. Its innovative ... immersive view of 1280 x 720 provides crisp images with remarkable clarity and color. ...
(Date:2/27/2017)... ... February 27, 2017 , ... Texas ... week. In addition, Discount Power's RCE (Residential Customer Equivalent) count exceeds 150,000. ... The company had 800 customers and 2,250 RCEs at the time of acquisition. ...
Breaking Medicine News(10 mins):
(Date:2/27/2017)... 2017   Vitasome ® Labs , Inc. ... its groundbreaking new liposome technology. Whereas vitamins lose on ... digestion per Physician,s Desk Reference , Vitasome , ... nutritional waste and are scientifically formulated to: ... Improve bioavailability with a vastly higher absorption ...
(Date:2/27/2017)...  RegeneRx Biopharmaceuticals, Inc. (OTCQB: RGRX) ("the Company" ... on tissue protection, repair and regeneration, today announced ... received a positive response from the U.S. FDA ... RGN-137 to treat epidermolysis bullosa ("EB"). RGN-137 is ... beta 4 ("Tß4") as the active pharmaceutical ingredient. ...
(Date:2/27/2017)... , February 27, 2017 Now in ... pharmaceutical companies that are most successful at developing and commercialising ... ... gave the same molecule to two different companies in early ... Based on systematic, objective analysis of each company,s performance between ...
Breaking Medicine Technology: