A raw food diet involves mainly whole, unprocessed, plant-based foods and at least three-quarters of the person's diet should consist of uncooked food. It is believed that eating a high proportion of raw foods makes you healthier. Cutting out processed food means that raw food dieters will probably lose weight at in the beginning of the conversion to raw foods.

Some nutrients, such as vitamins B and C, are reduced or destroyed by cooking, eating food raw ensures a better supply of these. It is also believed that with a raw food diet, the body is better able to prevent and fight chronic diseases. This is because raw and living foods contain essential food enzymes, which are destroyed by heat. These enzymes are the life force of a food. Nature has given each food its unique perfect mix. These vital enzymes allow us to digest our foods without having to rely on our own digestive enzymes.

Cooked foods are believed to take longer to digest and clog up the digestive system and arteries with partially digested fats, proteins, and carbohydrates.

Raw foodists claim to have more energy, clearer skin, better digestion, weight loss and have a lower risk of developing heart and cardiovascular disease

Studies have indicated that a plant-based diet can lead to weight loss and reduce the risk of cardiovascular disease, cancer, obesity, and type 2 diabetes.