Blood Sugar Control

Yams may improve your blood sugar levels. In one study, rats given yam powder or yam water extract experienced decreased fasting blood sugar and hemoglobin A1c (HbA1c) levels, compared with the control groups. HbA1c is a measure of long-term blood sugar control. Another study found that rats given higher amounts of purple yam extract showed reduced appetites, greater weight loss, and improved blood sugar control, compared with a control group. Furthermore, another study in rats found that supplementing with yam flour reduced the rate of blood sugar absorption, which led to improved blood sugar control. These effects are attributed to the resistant starch and fiber in yams.