Nutritional ketosis is a metabolic state in which the body primarily uses fat for energy instead of carbohydrates. This occurs when carbohydrate intake is significantly reduced, prompting the liver to convert fatty acids into ketones, which serve as an alternative energy source. This process can help some individuals manage weight and improve certain health markers. To achieve nutritional ketosis, a diet typically consists of high fats, moderate proteins, and very low carbohydrates. Common dietary approaches include the Ketogenic Diet and Low-Carb High-Fat (LCHF) Diet. Monitoring ketone levels can help individuals determine if they are in ketosis and adjust their diet accordingly.