Study Shows Cholesterol-lowering Power of Dietitian Visits

Worried about your cholesterol? You may want to schedule a few appointments with a registered dietitian, to get some sound advice about how to shape up your eating habits, according to a new national study led by University of Michigan Health System researchers.

Not only are you likely to lower your cholesterol levels, you may be able to avoid having to take cholesterol medication, or having to increase your dose if you’re already taking one. And you’ll probably lose weight in the process, which also helps your heart.

The new results, published in the February issue of the Journal of the American Dietetic Association, are based on data from 377 patients with high cholesterol who were counseled by 52 registered dietitians at 24 sites in 11 states.

In the group of 175 patients who started the study with triglycerides less than 400 milligrams per deciliter of blood (mg/dL), and who had their cholesterol measured before they changed or added medication, 44.6 percent either reduced their levels of “bad” cholesterol by at least 15 percent, or reached their cholesterol goal.

The results reflect progress in approximately eight months, after three or more appointments with a dietitian. But the results add further evidence that medical nutrition therapy, as it is called, can make a big difference in a patient’s life.

All of the R.D.s in the study based their advice to their patients on the latest research-based evidence about eating habits and cholesterol levels available at the time of the study: the American Dietetic Association’s 1998 Medical Nutrition Therapy Hyperlipidemia Protocol.

Since that time, the ADA has updated the clinical guideline based on new research, which means that patients who see an R.D. today may have even more success.

The study was funded by the ADA and its Clinical Nutrition Management Dietetic Practice Group, and based on a framework developed for a pilot project carried out in Michigan by the Michigan Dietetic Association and led by U-M cardiovascular dietitians.

“Everyone knows that nutrition is important for cholesterol management, and that a registered dietitian is the professional most thoroughly trained to help patients choose foods wisely,” says lead author Kathy Rhodes, Ph.D., R.D., manager of Nutrition Services with the U-M Cardiovascular Medicine program at Domino’s Farms and the U-M Cardiovascular Center. “But this is the first national study to show what happens when high-risk patients work with R.D.s to follow nutrition guidelines grounded in the best evidence.”

Key nutrition issues in the 1998 guidelines used in the study include reducing saturated and trans fat and increasing “healthy” fats such as olive oil; increasing soluble and insoluble fiber; eating fish twice a week; increasing fruits and vegetables; regular exercise and healthy weight management. Information about food-label reading and dining out was also included.