Which fruits can I eat on a keto diet? Yeah, the lists of foods you can and can’t eat on the low-carb diet are pretty daunting-but you don’t have to completely deprive yourself. Which food you should avoid during keto diet? One older study found that athletes who took 6 grams or about 1.5 teaspoons of MCTs with food before cycling used more fat instead of carbs for energy, compared to those taking LCTs.