ISSN:0361-1817    

出版商:OVID    

年代:1986

数据来源: OVID

ISSN:0361-1817    

出版商:OVID    

年代:1986

数据来源: OVID

摘要:

Almost one-third of American adults regularly take vitamins and supplements. If taken incorrectly or in excess, these vitamins may be a potential health hazard. Vitamins are essential nutrients which, in combination with other nutrients (e.g., fats, carbohydrates and proteins), foster normal metabolism. Vitamins also interact with each other. For example, vitamin C participates in the metabolism of folic acid, and vitamin E facilitates the absorption and storage of vitamin A. Because the biological functions of vitamins are interrelated, a diet poor in vitamins, carbohydrates, fats and proteins is not necessarily enhanced by vitamin supplementation. When vitamins are taken in excess of the Recommended Dietary Allowances or the individual's needs, the vitamins no longer function as vitamins but instead act as drugs, with such pharmacological effects as clinical toxicities and the abnormal utilization of vitamins. There are six categories that require vitamin supplements and, in some cases, megadoses. These will be discussed in detail. In addition, a brief table showing the Recommended Dietary Allowances will be given which the nurse practitioner can use in assessing nutritional needs of the client so that necessary adjustments can be made. Finally, a brief review of the potential risks and benefits of megadoses in normal, healthy adults will be given.

ISSN:0361-1817    

出版商:OVID    

年代:1986

数据来源: OVID

摘要:

Approximately half of the people in the United States take vitamin supplements, and some use alarmingly high doses. In this article, physiological functions of vitamins and the effects of vitamin deficiencies are summarized. Common food sources of vitamins are listed and a suggested daily eating guide is provided to assist in proper food intake. Adding vitamin supplements to a poor diet may alleviate some symptoms of deficiency, but cannot compensate for the lack of other nutrients. For optimum health, balanced, wholesome meals are recommended.

ISSN:0361-1817    

出版商:OVID    

年代:1986

数据来源: OVID

ISSN:0361-1817    

出版商:OVID    

年代:1986

数据来源: OVID

ISSN:0361-1817    

出版商:OVID    

年代:1986

数据来源: OVID

ISSN:0361-1817    

出版商:OVID    

年代:1986

数据来源: OVID

ISSN:0361-1817    

出版商:OVID    

年代:1986

数据来源: OVID

ISSN:0361-1817    

出版商:OVID    

年代:1986

数据来源: OVID