Carol Johnston, RD, PhD

Carol Johnston, RD, PhD, professor and assistant director of the School of Nutrition and Health Promotion at Arizona State University, Phoenix. Dr. Johnston has published nine papers on the medical use of vinegar in leading medical journals.

Vinegar Can Do Wonders for Your Blood Sugar

Vinegar Can Do Wonders for Your Blood Sugar

Carol Johnston, RD, PhD | May 4, 2018

Apple cider vinegar—indeed, any vinegar—can help prevent blood sugar spikes in people with diabetes or prediabetes. Here's the right way to use it.

Best-Bet Juices with Surprising Health Benefits

Best-Bet Juices with Surprising Health Benefits

Carol Johnston, RD, PhD | July 26, 2012

To boost nutrition, try the unusual juices now sold at health-food stores and juice bars... or use a juicer to…

Vinegar Helps Diabetes

Vinegar Helps Diabetes

Carol Johnston, RD, PhD | January 4, 2012

Adding vinegar to a meal slows the glycemic response—the rate at which carbohydrates are absorbed into the bloodstream—by 20%. Reason:…