Explain the role of sulfur in human nutrition
Sulfur is a component of certain amino acids (e.g., cysteine and methionine) in the body. Sulfur-containing amino acids give many proteins structural rigidity. As such, they are necessary to healthy joints, hair, skin, and nails. It is not surprising that protein-rich foods provide the body with generous amounts of sulfur. Sometimes, dissolved sulfur is detectable in drinking water by its egg-like (but harmless) odor and taste. Certain juices, beers, wines, and ciders contain sulfur, and sulfur-containing agents are added to some dried foods to preserve their freshness and color.Adequate sulfur intake enables the synthesis of compounds that construct healthy connective tissue and facilitate nerve function. Sulfur is also an important component of the B vitamins thiamin and biotin, and is therefore essential to energy metabolism. Sulfur requirements are easily met when adequate amounts of sulfur-containing amino acids are consumed. The Dietary Reference Intake (DRI) committee took this into account when developing intake recommendations for protein and decided not to publish additional DRI values for sulfur.
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Which of the following describes sickle-cell anemia?
A) It occurs only in Caucasians. B) It causes no long-term health effects. C) It is caused by abnormal formation of hemoglobin. D) Abnormal sickle cells are hard to destroy.
Which of the following statements describes one aspect of mineral nutrition of older adults?
a. Zinc intake is adequate for about 95% of this group. b. Iron absorption is reduced due to low stomach acidity. c. Calcium intakes of females are near the RDA for this group. d. Calcium allowances for this group have recently been increased by the Committee on Dietary Reference Intakes. e. Folate excesses are fairly common.
Pam is a visiting student in Japan and her host family serves her rice with nearly every meal. This food choice is most likely influenced by
A. food trends. B. culture. C. time constraints. D. all of the above.
A goiter is a deficiency of which of the following?
A. sodium B. iron C. calcium D. iodine