Nutritional ketosis” is a natural metabolic state where your body burns fat for fuel rather than carbohydrates. When you decrease the available glucose in your body, stored fats are broken down (metabolized) to be used instead for energy. During this process, fatty acids known as ketones are released into the blood stream, hence the name: ‘ketosis’.
A ketogenic diet is simply any way of eating that promotes this process. Other popular terms for it are “low carb high fat” (LCHF) or “high fat low carbohydrate” (HFLC). The simple premise behind LCHF eating is that by reducing your intake of carbohydrates (sugars and starches) and increasing the percentage of fat intake, your body adapts to metabolizing fat for energy rather than carbohydrate. This is known as becoming ‘fat-adapted’, and there are many doctors, physicians and dietitians who are now encouraging their patients to adopt this way of eating.