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.
Nutrient Density. 1. Divide the amount of the nutrient per serving by the recommended amount 2. Divide the calories in a serving by daily caloric need Compare the two-the food is Nutrient dense if provides a greater contribution to nutrient need than calorie need-otherwise we may call it Empty calorie foods. î î î.