New research from Uppsala University shows that saturated fat builds more fat and less muscle than polyunsaturated fat. This is the first study on humans to show that the fat composition of food not only influences cholesterol levels in the blood and the risk of cardiovascular disease but also determines where the fat will be stored in the body. The findings have recently been published in the American journal Diabetes.
The study involved 39 young adult men and women of normal weight, who ate 750 extra calories per day for seven weeks. The goal was for them to gain three per cent of their starting weight. The project received considerable attention when it started in 2011, partly because the extra calories were ingested in the form of muffins with high fat content, baked in the lab by Fredrik Rosqvist, a doctoral candidate and first author of the study.
One half of the subjects were random to eat surplus calories from polyunsaturated fat (sunflower oil), while the other half got their surplus calories from saturated fat (palm oil). Both diets contained the same amount of sugar, carbohydrates, fat, and protein; the only difference between muffins was the type of fat.
The increase in body fat and the distribution of fat in the body was measured using a magnetic resonance imaging (MRI scans) before and after the weight gain, as was the muscle mass in the body. Gene activity was measured in the abdominal visceral fat before and after the weight gain with the help of a gene chip that studies several thousand genes at a time.
Despite comparable weight gains between the two diet groups, the surplus consumption of saturated fat caused a markedly greater increase in the amount of fat in the liver and abdomen (especially the fat surrounding the internal organs, visceral fat) in comparison with the surplus consumption of polyunsaturated fat. Moreover the total amount of body fat was greater in the saturated fat group, while, on the other hand, the increase in muscle mass was three times less for those who ate saturated fat compared with those who ate polyunsaturated fat. Thus, gaining weight on excess calories from polyunsaturated fat caused more gain in muscle mass, and less body fat than overeating a similar amount of saturated fat. Since most of us are in positive energy balance, and consequently gain weight slowly but gradually over time, the present results are highly relevant for most Western populations.
“Liver fat and visceral fat seems to contribute to a number of disturbances in metabolism. These findings can therefore be important for individuals with metabolic diseases such as diabetes. If the results regarding increased muscle mass following consumption of polyunsaturated fat can be confirmed in our coming studies, it will potentially be interesting for many elderly people, for whom maintaining muscle mass is of great importance in preventing morbidity,” says Ulf Risérus, associate professor at
RATE, COMMENT, SHARE, & SUBSCRIBE TO MY CHANNEL! *Workout & Nutrition Programs Available* Contact: email@example.com “I apologize for the qualit…
Video Rating: 4 / 5
The leg length shims are used to compensate for leg length discrepancies.The leg length shims are used to compensate for leg length discrepanciesMade of high-density plastic to conform to the curve of the sole of the shoe, 3 mm thickScrews are included
List Price: $ 21.99
Price: $ 21.99
Does your child get enough exercise? You can get your children more active with these 5 fun parenting tips.
In just four steps, you can improve your health for the better and this article will show you how. The steps below are bite-sized nuggets of health information you can actually use to live a healthy life. Here we go… Nutritional supplements are the first step As far as I’m concerned, they are very important […]
Several food and nutrition trends were in the spotlight this year, including the continued rise of plant-based diets, non-dairy ice creams and superfoods that are blasts from the past — legumes, apples and cabbage. It can be easy to experience nutrition whiplash in the New Year, but don’t be a victim. Get a jump-start on […]
Setting intentions is a powerful thing. Then when you have that shiny new gym membership in hand, you feel like nothing stands between you and your goals to get in shape once and for all. Trouble is, lack of motivation, unpreparedness and busy schedules have a way of interfering with our plans. If you find […]