PET scans of areas of their brains activated by thirst showed reactions -- particularly in the cingulate cortex. In the elderly, drinking a much smaller volume of water is needed to cause that area of brain activation to subside, said Egan, who is an expert on neuro-imaging.
What is Nutrient Density? It is a measure of the nutrients provided per calorie of food, or the ratio of nutrients to calories (energy). Foods that supply generous amounts of one or more nutrients compared to the number of calories they supply are called nutrient dense.
H=N/C. Your health (H) is predicted by your nutrient intake (N) divided by your calorie intake (C). This straightforward formula defines the nutrient density of your diet. It is the basis of nutritional science and nutritional healing and is a critical concept that Dr. Fuhrman uses in his dietary recommendations. Food supplies both nutrients and calories (energy).