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Search Term: " 21.3 "
CLA and Body Fat   
Date:
June 22, 2005 09:50 PM
CLA and Body Fat Of all the health concerns facing Americans today, few are as important and daunting as weight loss and body fat. In the 1980s, Americans gained an average of eight pounds each. That’s on the order of 1 million tons of flab—2 billion total American pounds.45 So large is the current girth that as many as two in three Americans could be termed overweight.46 Being overweight and having excess fat increases the risk of heart disease, some forms of cancer and diabetes. That collection of health challenges would be difficult enough, but being overweight has many problems that accompany it, including battles with self-esteem. Let’s give a historical example of this story. The emotional power of being perceived as too fat is caught with pathos in the life of former U.S. President William Howard Taft. Taft, who is the only man to serve as both president and as chief justice of the Supreme Court, was noted for his honesty and his integrity. The nation mourned his death, but much of his internal story focused on his battle with weight. One editorial cartoonist showed the island of Cuba tipping under his girth. Once, when he visited Japan, an entire village worked together to pull his rickshaw up a hill. When he married, his personal esteem showed when he told his wife that “I shall worry you so much with my appetite that you must gain strength to meet the trial.” Taft refused to be seen on a horse because of how awkward he looked. At one point, he lost 75 pounds, but, like so many others, ended up gaining that amount back , and more, during the next 10 years. He died of athero s c l e rosis, something associated with being ove rwe i g h t .4 7 The tragedy of Taft is that, like so many suffering with weight trouble, he seemed to let it damage his self w o rth, when he was a great asset to his nation and to others. History and culture put into us that being overweight means lacking in self-control and being a glutton, when in reality this isn’t true. So many more factors are involved. Each person has a different metabolism. Certain nutrients can meet different needs, and a lack of those nutrients can lead to fat retention. CLA may be one of those nutrients, one of those factors in our diets that can change our shapes and that have nothing to do with self-control, just nutritional luck and knowledge. In a study of rats, 28 days after beginning the study, body fat in those that ate CLA was 58 percent less than in those who didn’t consume any (10.13 percent body fat versus 4.34 percent body fat, a highly significant difference). Also, the percent of muscle was about one percent more in animals that ate CLA. The weights of both sets of animals were about the same.48 (Muscle weighs more than fat. This can mean that you won’t necessarily lose weight with CLA, but would gain muscle mass, which is tighter and more shapely.) The research in this area is slightly newer, but it has been reproduced in studies on other animals.49 That more than one kind of animal has shown that body fat is lower with supplements of CLA indicates that it will likely benefit humans as well. In July 1997, preliminary results of one of the first human studies involving CLA showed promising, preliminary results. For three months in 1997, 20 volunteers participated in a study, daily consuming an amount of slightly more than one gram of CLA at breakfast lunch and dinner. Three months later, their weights and body-fat percents were measured. Half of the group took a placebo. The average weight of the 10 who took CLA dropped by about five pounds (not enough to be statistically significant), but the body fat percentage dropped by about 15 to 20 percent, or from 21.3 percent of average body fat to 17 percent of body fat. Meanwhile, the group taking a placebo had little or no effect on either. Half of the people in the study were men and half were women. Two people in the study decided to drop out because they received unpleasant gastrointestinal upsets. One of those who dropped out was in the placebo group, the other in the group taking CLA.63 Nobody would suggest that CLA supplementation would be a pill freeing you to sit slug-like on the couch to watch M*A*S*H* re runs. A healthy, weight-conscious lifestyle requires many factors including exercise. As far as science can tell, CLA may not be essential the way certain vitamins are. If you consume no vitamin C, you can expect to get scurvy and die. There are no known deficiency diseases associated with an absence of CLA. Japanese consumers, for example, get very little CLA in their diets, but they also eat food very low in fat, and their lives are among the longest in the world.50 So, the role of CLA supplementation in regulating weight is most useful for those with a typically high-fat Western diet. As the science grows, it seems clear that CLA will lead to better health and more hope for people struggling with body fat.
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