Chapter 1, Problem 3SC

Some nutritionists claim that the secret to long life is to be slightly underweight as an adult. If a persons weight is related partly to diet, partly to activity level, and partly to genetics, what underlying factors could be at work to generate statistics that support this claim?

Which of the following statements is not true? a. Essential nutrients can be synthesized by the body. b. Vitamins are required in small quantities for bodily function. c. Some amino acids can be synthesized by the body, while others need to be obtained from diet. d. Vitamins come in two categories: fat-soluble and water-soluble.

As a person ages, the number of body cells steadily decreases and energy needs decline. If you were planning an older persons diet, what kind(s) of nutrients would you emphasize, and why? Which ones would you recommend an aging person eat less of?