Keto lunch ideas can help you stick to your weight loss plan. There is a lot of debate on the effects of ketosis on the body. Can ketosis lead to cancer? What are the long-term consequences? The short answer: No. But that doesn't mean it's not a good idea to stay away from it. Here's why: When you eat a low carbohydrate diet, ketosis occurs. This occurs when your body cannot break down certain carbohydrates for energy. The ketones are created to take the place of glucose and other sugars. It's been studied that ketosis can contribute to the risk of heart disease and diabetes.