Calcium is water soluble, but not fat soluble. It is the fifth most dissolved ion in seawater. On the other hand, fat is soluble into calcium in the body. The calcium will exâ¦tract the fat from food in the digestive system, and they combine to form a foamy substance which is not absorbed by the body, and so the fat will be flushed out.
Studies show that it is about 20 percent of the resting metabolic rate, which is about 1,300 calories a day, not of the total metabolic rate, which is about 2,200 calories a day, so the brain uses roughly 300 calories.
Hence, cell detoriation has nothing to do with ageing. As we grow older, the number of nerve cells- or neuron- in the brain decreases. We start with around 100 billion, but in our 30s this number starts to decline. By 49-50 we could be losing upto 10,000 per day, affecting memory, co-ordination and brain function.