AuthorMike Espy

Nutritional Needs of the Elderly


When the 21st century dawns in just a few years, one American in eight will be 65 years old or older. By 2030, the percentage of the population over age 65 is estimated to be 20 to 25 percent; that is one out of every four or five Americans. This is an enormous shift in population, perhaps the greatest in history, because the shift is occurring on every part of the globe. The magnitude of this...

What Is Energy Metabolism?


Energy can be defined as the capacity for doing work. Metabolism is the sum of processes by which the body handles a particular substance. When scientists study energy metabolism, therefore, they are studying the processes that handle energy in the body. What Is a Calorie? The energy value of foods or beverages is expressed in terms of the kilocalorie. If a food is burned and the heat produced is...

Bioavailability: How the Nutrients in Food Become Available to Our Bodies


Bioavailability is the degree to which food nutrients are available for absorption and utilization in the body. It is a critical issue for many nutritional concerns. Why Do We Care About Measuring Bioavailability? The role of bioavailability is important in establishing nutrient requirements and using those requirements in food labeling. The amount of a nutrient in a food that the body can...

Mike Espy