Not so, you certainly don&#x27;t need to eat sugar, too much sugar is poisonous and if usage is prolonged, causes insulin resistance and Type 2 diabeties. Starches are not much better, since they are so easily converted to sugars.<p>Most high energy usage organs inc the brain are quite happy burning ketone bodies - made from fat, in fact the heart prefers them. 
A few brain and organ functions do require some glucose, but these can be made from protein, better though to eat some healthy carbs such as spinach, for this.
Most Type 2 diabetes sufferers can be cured by a strict low carb high fat diet.
Healthiest fats are saturated grass fed cow&#x27;s butter and lard, coconut oil or mono saturated olive oil - contrary to most people&#x27;s belief.
Unsaturated vegetable oils are very dangerous they are unstable and easily become poisonous, margarine is evil.