A keto diet trains the body to switch from its preferred fuel source of carbohydrates to burning fat instead. This is called ketosis, hence the name keto. To reach and stay in ketosis, getting the right balance of fats, proteins and carbohydrates, usually in a 70/20/10 ratio, is crucial and difficult to maintain.
A fat called a medium-chain triglyceride (MCT) can help. Usually derived from coconut oil MCTs are easier to digest and absorb, helping to stay in ketosis. There are a range of keto supplements such as multivitamins, protein powders, diet boosts, and oils, as well as MCT oil itself.
The best selling brands in NZ are Nature's Way NZ and Radiance.