A variety of olive and other vegetable oils, nuts, seeds, and avocados are all included (and emphasized) on the keto diet and should be a part of any type of diet and lifestyle. Pick the right fats, and include them in smaller doses. "Though the ketogenic diet can be upwards of 70 to 80 percent fat (and that's a LOT), everyone does need to include healthy fat in their diet," Hultin says.