Inadequate Vitamin D Levels Prevalent Among “healthy” Children |
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The July, 2007 issue of the American Journal of Clinical Nutrition reported the conclusion of researchers at The Children’s Hospital and the University of Pennsylvania School of Medicine in Philadelphia that many otherwise healthy children and adolescents have inadequate levels of vitamin D. Vitamin D deficiency in youth can lead to rickets, muscle weakness, and defective bone mineralization. Reduced levels of the vitamin have been linked with poor immune function, hypertension, cancer, multiple sclerosis, type 1 diabetes, and obesity. Babette Zemel, PhD and her associates measured the serum 25-hydroxyvitamin D levels of 382 healthy children between the ages of 6 and 21 living in the northeastern United States. Interviews were conducted to determine dietary and supplemental vitamin D intake. Fat and lean mass were measured using dual-energy x-ray absorptiometry. The team found that 55 percent of the children had inadequate serum vitamin D levels of less than 30 nanograms per milliliter. Sixty-eight percent experienced low wintertime levels. African Americans, children aged 9 and older, and those whose vitamin D intake was low were likeliest to have reduced serum vitamin D levels. Fat and lean body mass were not found to have independent associations with vitamin D status. “The best indicator of a person’s vitamin D status is the blood level of a vitamin D compound called 25-hydroxyvitamin D,” Dr Zemel noted. “Vitamin D deficiency remains an under-recognized problem overall, and is not well studied in children.” Health Concern Osteoporosis It is common knowledge that calcium and vitamin D work together to help prevent osteoporosis. But what about the many other essential minerals and nutrients needed for bone health? And which kind of calcium is really the best? Many people are surprised to learn it is probably not the kind they are taking on a regular basis. The human skeleton is the single largest organ system in the body. Composed of a complex mix of organic proteins and inorganic mineral crystals, bones are much more than just structural supports. They are the body’s only reservoir of minerals such as calcium and phosphorus, which are critical for virtually every other organ system. The bones are also highly sensitive to hormonal changes. During puberty, when hormone levels surge in both boys and girls, bones are stimulated to grow rapidly as teenagers become full-sized adults. Thus, it is not really surprising that in later years, as hormone levels decline, the bones become vulnerable. Maintaining healthy bones goes far beyond calcium and vitamin D, although these are vital. A healthy bone matrix also relies on vitamins and minerals that are rarely mentioned in the context of osteoporosis, including zinc, boron, copper, magnesium, vitamin K, silicon, folic acid, and others. This information is vital to the 10 million people, including 2 million men, who are known to suffer from osteoporosis in the United States. |
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