七选五
As you sit down to breakfast, your cereal declares itself "added with vitamins and iron", your milk is "rich in calcium", and your orange juice is "packed with vitamin C". . Unchecked, these deficiencies(缺乏) can be dangerous.
. For example B vitamins help change nutrients into energy, while minerals help maintain blood pressure. Although vitamin D can be synthesized(合成) from sunlight, almost all our vitamins and minerals come only from what we eat. And that can be a problem.
As the early 1900s progressed and revealed the existence and role of vitamins and minerals, supplements(补品) quickly became a popular way to make up for a poor diet. The United States first issued nutrient intake recommendations to the public in 1941. . Today, we know that a balanced diet will usually provide all the vitamins and minerals we need.
. Because for many reasons, people across the developed and developing world are unable to access the right quantity, quality, and variety of food.
Most deficiencies can be treated simply by bringing our intake of vitamins and minerals up to their RDA. . As the global population grows and it becomes even harder to ensure that everyone has the foods they need, supplements could play an important role in maintaining world health. So long as supplements remain a supplement and not a substitute for the goal of a healthy, balanced diet, they can be a welcome addition to the breakfast table.
A. People got worse, not better
B. However, deficiencies continue
C. Vitamins and minerals play vital functions in our bodies
D. And one easy way to do this is through taking supplements
E. Almost all our vitamins and minerals come from what we eat
F. Later, the Recommended Daily Allowance (RDA) was introduced
G. Such labeling is the result of a century of worry that we are not getting the vitamins and minerals we need