Whether or not you should eat potatoes on a sugar-free diet depends on your reason for the diet. If you are looking to retrain your tastebuds and simply ensure a longer, healthier life, then potatoes are a nutrient-dense food to enjoy. However, if you’re going sugar-free to help balance blood sugar, be mindful of including potatoes too often. Potatoes are relatively high on the glycemic index, meaning that they cause a sharper rise in blood sugar. Someone looking to keep blood sugar stable should focus on protein, fat, and non-starchy veggies. Learn more about natural sugars vs. added sugars.