How does our Body Burn Fats?

Ketosis is a metabolic state in which the body uses stored fat as its primary source of fuel instead of carbohydrates. To get into ketosis, you need to limit your intake of carbohydrates and increase your intake of fat, so your body starts using fat for fuel instead of glucose.

When you consume a low amount of carbohydrates, your body's glycogen stores become depleted, and it starts breaking down stored fat into molecules called ketones. These ketones are then used as fuel by the body, including the brain, which typically relies on glucose for energy.

Our body has three main sources of fuel:

Carbohydrates are the body's primary source of energy. They are broken down into glucose, which is used by the body's cells as fuel. Carbohydrates can be found in many foods, including grains, fruits, vegetables, and dairy products.

Fats are stored in adipose tissue and can be broken down into fatty acids and ketones to be used as fuel by the body's cells. Fats can be found in many foods, including nuts, seeds, avocados, oils, and fatty meats.

Proteins are broken down into amino acids and can be used as a source of energy by the body's cells when carbohydrate and fat stores are low. However, proteins are primarily used for building and repairing tissues, not as a primary source of energy. Proteins can be found in many foods, including meat, fish, eggs, dairy products, and plant-based sources such as beans, lentils, and tofu.

When your liver and muscle glucose stores start to run out, your body tries to make glucose. Fat cannot be used to make glucose, so your body uses its protein stores (ie muscle) to make glucose. After a while, your body switches from using glucose to using fat as fuel for energy.