What is meant by low carb high fat?

Food Components. Generally, the components of all food (which can be burned to release calories) are composed of carbohydrate, fat &/or protein molecules. The rest is water, indigestable + trace vitamines & minerals. Carb refers to carbohydrates, meaning sugar molecules, both simple &/or complex. Fat refers to all fat (aka oil, lipid, hydrocarbon) molecules. Use google images to see the molecular patterns of atoms.