It does not allow fruits, nor most vegetables, grains, potatoes, sweets or other foods rich in carbohydrates. A common distribution is to eat 5% of the total calories from carbohydrates, 20% from proteins and 75% from fats.
This only allows between 20 and 50 grams of carbohydrates per day! The general premise of the ketogenic Revolyn Keto Burn Review is to produce ketone bodies, which are metabolites of fatty acids and use them instead of glucose to feed the cells. The ketogenic diet was first adopted as a treatment for people with epilepsy in the 1920s, as it was shown to reduce seizure activity in some patients.
Nowadays, most people opt for anticonvulsant medications (Revolyn Keto Burn Review), but some still use this diet to help control their condition.