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A medical ketogenic diet is a very low carbohydrate, high fat diet which changes the metabolism in the body from burning glucose for energy to burning fat for energy. It is currently a recognised treatment for intractable (drug resistant) epilepsy, Glut 1 Deficiency and Pyruvate Dehydrogenase Deficiency. Increasingly the diet is being looked at in other neuro-metabolic conditions as well as Brain Cancer.