Here Are The Foods You Can't Eat On Keto: On a ketogenic diet, you should avoid high-carb foods like grains, sugars, and some fruits. ... - Grains: Rice, wheat, oats, barley, rye, quinoa, buckwheat, etc. - Starchy Vegetables: Potatoes, peas, sweet potatoes, yams, corn, cassava, artichoke, etc. More items... Apr 3, 2023