Nutritional Deficiencies
Magnesium -
updated: 17 November 2008
Dietary intake and bioavailability of trace elements
Biol Trace Elem Res. 1989 Jul-Sep;21:173-8.
Abdulla M, Behbehani A, Dashti H.
In order to assess the nutritional importance of trace elements, it is relevant to consider the factors regulating their metabolism. One of the most important factors is the true intake level. Conventional techniques such as diet history and interview studies in conjunction with standard food tables do not provide the true intake levels from prepared meals. Employing the duplicate portion technique, we have investigated the dietary intake of trace elements in prepared meals consumed by children, adults, and elderly in Sweden. The results indicate that the intake of potassium, magnesium, zinc, copper, and selenium is low when compared with the present recommended dietary allowance (RDA) values. It appears that a marginal deficiency of a number of trace elements may exist in the general population of affluent countries. When the dietary intakes are known, it is necessary to consider the bioavailability. This depends on the chemical form as well as the concentration of other dietary constituents such as fiber, phytate, carbohydrates, macrominerals, and vitamins in the diet. Knowledge of these interactions are important to improve the overall nutritional status of the population in general and patients in particular.
Publication Types:
Online - Abstract
A review of magnesium intake in the elderly. A cause for concern?
Magnes Res. 1992 Mar;5(1):61-7
Costello RB, Moser-Veillon PB.
Elderly people in the United States represent an emerging high risk group for nutritional deficiencies. A magnesium deficit in the elderly can occur due to inadequate nutrient intakes, multiple drug use, or altered gastrointestinal function. Magnesium has been targeted as a risk factor for elderly people and has been implicated in the aging process. Data presented in this review confirm decreased availability of magnesium in the food supply, lower intakes of magnesium by elderly people, and widespread supplementation practices. Conflicting data exist regarding levels of magnesium in the blood and magnesium status in the elderly. It is not known to what extent suboptimal intakes may affect the aging process; however, magnesium-deficient conditions have been associated with neuromuscular and cardiovascular disorders, endocrine disturbances, insulin resistance and Alzheimer's disease.
Publication Types:
Online - Abstract
Magnesium content of the food supply in the modern-day world
Magnesium. 1986;5(1):1-8
Marier JR.
A large-scale US survey has shown that the dietary magnesium intake tends to be lower than recommended. The suboptimal intake prevalent among US adults is consistent with the pattern observed in other North American and European surveys. Several factors are discussed, including the waterborne magnesium factor, the loss of magnesium during food refining and the magnesium content of vegetarian diets, as well as various metabolic situations, e.g., hypertension, pregnancy, osteoporosis, drug therapy, alcoholism, stress and cardiac trauma. The benefits of magnesium supplementation among those with sub-RDA intakes are illustrated.
PMID: 3515057 [PubMed - indexed for MEDLINE]
Publication Types:
Online - Abstract
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