Yes, vegetarians can get into ketosis by following a ketogenic diet. A ketogenic diet is a high-fat, low-carbohydrate diet that eliminates many common food groups, including fruits and vegetables. To reach ketosis, vegetarians will need to consume mostly protein and fat. However, it's important to remember that not all protein and fat sources are created equal. Be sure to choose healthy fats, such as olive oil and avocados, and quality protein sources, such as eggs and tofu. And when possible, opt for organic and non-GMO foods.