SOURCE: UltraWellness

May 01, 2008 12:17 ET

Why Low-Fat Dieting Has No Effect on Weight Loss

Dr. Mark Hyman of UltraWellness Explains Why Testing Blood Sugar Levels for Insulin Resistance Is Essential for Weight Loss

LENOX, MA--(Marketwire - May 1, 2008) - That low-fat diet you've been struggling to stay on may have no effect on your weight loss. Pioneering research by Harvard Medical School's David Ludwig recently found that dietary fat is not a major determinant of body fat. The main factor that determines changes in body weight and waist circumference (also known as belly fat) is how your body responds to any type of sugar, carbohydrate, or glucose load.

"Over the last 15 years, I have tested nearly all of my patients using a test that most doctors never use. Thankfully, Dr. Ludwig's research brings this critical method of diagnosing insulin resistance and the cause of obesity and disease to the forefront," said Mark Hyman, M.D. of UltraWellness. "I strongly recommend the glucose tolerance test, which measures your insulin and blood sugar at 30 minutes, one hour, and two hours to get the best picture of your insulin profile."

If you are a high insulin secretor and your insulin goes over 30 during the test, you produce too much insulin and need to be sure you are staying on a low glycemic load, whole-foods, unprocessed diet which keeps your blood sugar even.

"The future of treating obesity and weight loss is in personalizing our approach," said Hyman. "This approach is detailed in my book 'UltraMetabolism.' It's called nutrigenomics, which is the science of how we can use food to influence our genes and personalize our approach to health."

The glucose tolerance test is cheap, easy to do, and it is probably the most important test for determining your overall health, the causes for obesity, and your risk of diabetes, heart disease, cancer, Alzheimer's, and premature aging.

For more information on the test, nutrigenomics and eating a low glucose diet for weight loss, visit The UltraWellness Blog (


Ebbeling CB, Leidig MM, Feldman HA, Lovesky MM, Ludwig DS. Effects of a low-glycemic load vs low-fat diet in obese young adults: a randomized trial. JAMA. 2007 May 16;297(19):2092-102

Chaput JP, Tremblay A, Rimm EB, Bouchard C, Ludwig DS. A novel interaction between dietary composition and insulin secretion: effects on weight gain in the Quebec Family Study. Am J Clin Nutr. 2008 Feb;87(2):303-9

About UltraWellness:

UltraWellness -- lifelong health and vitality -- is based on the emerging field of functional medicine, which addresses health problems not by treating the symptoms, but by balancing the 7 core underlying biological processes that govern health. This is done by finding imbalances, getting rid of the things that cause those imbalances, and providing the necessary things to restore balance, which then allows the body's natural intelligence to facilitate healing and take care of the rest. Co-founder of UltraWellness, Mark Hyman, M.D., is a respected medical consultant, New York Times bestselling author, lecturer, practicing physician and leader in the emerging field of functional medicine.

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