How does bioavailability vary among trace minerals?
What will be an ideal response?
Trace minerals often compete with each other for absorption in the GI tract. Some trace minerals, such as iron, copper, and zinc, are absorbed in their ionic state, have the same ionic charge 1+22, and use the same protein carriers during absorption. Too much of one of these minerals, such as iron, Fe+2, can cause a decrease in the absorption and metabolism of another, for example, copper, Cu+2, leading to an imbalance.2 Thus, bioavailability of each mineral depends on the amount of both minerals in the GI tract at the time of absorption. To increase mineral bioavailability, persons should not take single-mineral supplements.
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A person suffering from celiac disease must avoid ________.
A. eating foods that contain phenylalanine B. consuming foods that contain gluten C. taking dietary supplements that contain homocysteine D. lying down after meals
Which of the following foods is NOT a good source of thiamin?
A. Whole milk B. Wheat germ C. Pork chops D. Enriched bread
Which of the following is true about PPN?
a. The formula is generally sufficient in protein and kilocalories. b. It is administered through a central line. c. It is indicated for long-term support. d. The formula is dilute so it does not irritate veins.
The well-documented advantages of taking a vitamin supplement are typically related to reversing or preventing vitamin deficiencies that have resulted from a poor dietary intake
Indicate whether the statement is true or false