Calcium In Men Research Articles

Food patterns, flour fortification, and intakes of calcium and vitamin D: a longitudinal study of Danish adults.

STUDY OBJECTIVE: Deficiencies in calcium and vitamin D intakes are involved in the aetiology of osteoporosis, and health authorities recommend that the population consume a diet providing sufficient calcium and...

D10 Protein kinase C-induced changes in cellular Na+/H+-exchange and cytosolic free calcium in men

D10 Protein kinase C-induced changes in cellular Na+/H+-exchange and cytosolic free calcium in men

Calcium, phosphorus, vitamin D, dairy products and colorectal carcinogenesis: a French case--control study.

A protective effect of calcium against colorectal cancer has been described in Anglo-Saxon but not in Latin communities, and no such effect has been observed regarding adenomas. We investigated the relationship between calcium, dairy products and the adenoma-carcinoma sequence in a French region by comparing small adenoma ( < 10 mm, n = 154), large adenoma (n = 208) and polyp-free (n = 426) subjects, and cancer cases (n = 171) with population controls (n = 309). There was no protective effect of calcium against colorectal tumours except for low fat calcium and large adenomas in men (OR for highest quintile = 0.3, P for trend = 0.06). There was even a trend towards an increased risk of cancer with dairy calcium in men and non-dairy calcium in women. Vitamin D was inversely related to the risk of small adenomas in women (OR for highest quintile = 0.4, P for trend = 0.04). Regarding dairy products, only consumption of yoghurt displayed an inverse relationship with risk of large adenomas, in both men and women. These data failed to demonstrate a protective effect of calcium against colorectal carcinogenesis. They suggest that the type of dairy product might be the important factor with regard to prevention of colorectal tumours.

Changes in magnesium, zinc and calcium in men and women after an acute myocardial infarction

The relations between different elements in acute myocardial infarction (MI) led us to determine erythrocyte (Erc) and/or plasma (Pl) concentrations of magnesium (Erc-Mg; Pl-Mg), zinc (Erc-Zn; Pl-Zn) and calcium (Pl-Ca) in 34 men and 8 women upon admission to hospital and then on days 2, 3, 6, 10 and 12. On day 1, these two groups were compared with 58 reference men or 53 reference women. The changes in the different variables from day 1 to day 12 were analyzed by one-way ANOVA. In MI men, from day 1 to day 12, all cations were significantly modified. In MI women, only Erc-Zn and Pl-Ca remained unchanged. In both populations, Pl-Mg, Erc-Mg and Pl-Zn increased significantly between day 1 and day 12.

Mineral Balances of Men and Women Consuming High Fiber Diets With Complex or Simple Carbohydrate

Calcium, copper, iron, magnesium, manganese, and zinc balances of 20 men, 19 premenopausal women, and 12 postmenopausal women were determined while they consumed self-selected diets or high fiber diets with either complex or simple carbohydrate. Self-selected intakes of calcium, magnesium, copper and zinc were generally below RDA levels. Iron intakes of premenopausal women were less than two-thirds RDA. Balances during the self-selected intake period of calcium in men and women and of magnesium and zinc in women were negative, but lower-than-usual intakes could have contributed to this. High fiber diets did not adversely affect zinc, copper, manganese or iron balances. Calcium and magnesium balances were generally negative, especially in women, even though intakes were adequate. Excretion of copper was increased in premenopausal women consuming the simple carbohydrate diet. The levels of magnesium and especially calcium needed to maintain balance when consuming a high fiber diet may be above present RDA levels.

Potentiometric determination of serum ionized calcium in a normal human population

Ionized calcium and total calcium were measured in sera from 101 normal individuals aged 19–96 years. Significant changes with age were observed for ionized calcium in both sexes and for total calcium in men. The relation between pH changes and the level of ionized calcium in vitro and in vivo during hyperventilation was examined. Some methodological factors that influence the results, namely preparation of the standard solutions, sample collection, and storage of the sample, have been evaluated.