Answer to Question 1
Both vitamins and minerals are essential to life, growth, and body maintenance.
These substances either come from food or are produced within the body. The functions of specific vitamins and minerals are explained throughout the chapter. Food should be the source of our nutrients. The fat-soluble vitamins have both plant and animal sources. For example, vitamin A comes from dairy products and the precursor beta-carotene comes from orange vegetables like squash and carrots. Many of the B vitamins, such as thiamin, riboflavin, and niacin, are found in enriched and whole-grain products. Vitamin B12 is found only
in animal products. Calcium is found in good amounts in milk. Potassium is found in both fruits and vegetables, with bananas and potatoes being good sources. For a full list, refer back to Exhibits 5.4 and 5.7 . The UL is the DRI value that will indicate if a person needs to reduce the
amount of vitamins and minerals they are consuming. Consuming too many vitamins and minerals can be harmful to health. Whole food and fortified food can contribute to total vitamin and mineral consumption. Toxic amounts of each are usually the result of taking high-dose supplements every day.
Answer to Question 2
DRI's, Adequate Intake (AI)
Massive amounts of wood are stored on the forest floor of old-growth temperate coniferous forests of
Point Sources of Pollution
Recommended Dietary Allowances of Micronutrients (Continued)
In middle childhood, children spend increasing amounts of time with peers and friends.
Sources for Job Opportunities
Derivatives of reciprocal trigonometric functions