Fats and mental energy expenditure. From my understanding of it, our bodies use 85% of energy it takes in on the brain. would that mean the more you think and push the limit of your consciousness, you would be using more energy? if thats the case, would that mean that fats are even lazier than I thought? fats would entire existence would be lazy. it is regardless, but if this were the case it would be even more so.  What are your thoughts on this? I feel this idea would be better formed with more information and other peoples perspectives.