Calcium News and Research

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Calcium, the most abundant mineral in the body, is found in some foods, added to others, available as a dietary supplement, and present in some medicines (such as antacids). Calcium is required for muscle contraction, blood vessel expansion and contraction, secretion of hormones and enzymes, and transmitting impulses throughout the nervous system. The body strives to maintain constant concentrations of calcium in blood, muscle, and intercellular fluids, though less than <1% of total body calcium is needed to support these functions.

The remaining 99% of the body's calcium supply is stored in the bones and teeth where it supports their structure. Bone itself undergoes continuous remodeling, with constant resorption and deposition of calcium into new bone. The balance between bone resorption and deposition changes with age. Bone formation exceeds resorption in growing children, whereas in early and middle adulthood both processes are relatively equal. In aging adults, particularly among postmenopausal women, bone breakdown exceeds formation, resulting in bone loss that increases the risk of osteoporosis over time.

Low levels of dietary folate linked to sperm abnormalities

Healthy men who report lower levels of the nutrient folate in their diets have higher rates of chromosomal abnormalities in their sperm, according to a new study by researchers at the University of California, Berkeley, and the Lawrence Berkeley National Laboratory.

20 Mar 2008

Battle against obesity could be tackled one community at a time

The battle against obesity in this country could be tackled one community at a time, according to a newly published study in the Journal of Physical Activity and Health. Researchers at the University of Colorado at Denver demonstrated the effectiveness of changing behaviors at a community level, suggesting that community-based interventions could be a viable option to address the nation's obesity epidemic.

20 Mar 2008

Vegan diet for rheumatoid arthritis patients protects from heart attacks and strokes

A new study suggests that following a gluten-free, vegan diet may offer rheumatoid arthritis patients some protection from heart attacks and strokes.

19 Mar 2008

Survival mechanism of T lymphocytes uncovered

When an individual is challenged by a virus, a bacterium or any other infectious agent, several classes of white blood cells are being activated in order to fight the invasion.

19 Mar 2008

Investigational drug Debio-025 tested for preventing muscle fiber death in muscular dystrophy

An investigational antiviral drug currently undergoing human trials in Europe for treating Hepatitis C infections may have potential to reduce muscle cell damage in Duchenne and other forms of muscular dystrophy (MD).

17 Mar 2008

Magnesium linked to lower risk for some strokes in male smokers

Male smokers who consume more magnesium appear to have a lower risk for cerebral infarction, a type of stroke that occurs when blood flow to the brain is blocked, according to a report in the March 10 issue of Archives of Internal Medicine.

11 Mar 2008

How variants of a specific gene, CAPON or NOS1AP, can disrupt normal heart rhythm

A research team from the Cedars-Sinai Heart Institute, Johns Hopkins University and China Medical University and Hospital in Taiwan have described for the first time the mechanisms by which variants of a specific gene, CAPON or NOS1AP, can disrupt normal heart rhythm.

4 Mar 2008

Diltiazem reduces cocaine cravings in a rat model

Researchers from Boston University School of Medicine and Harvard Medical School have found that diltiazem, a drug used in the treatment of high blood pressure, reduces cocaine cravings in a rat model.

28 Feb 2008

Mechanism of blood clot elasticity revealed in high definition

Blood clots can save lives, staunching blood loss after injury, but they can also kill. Let loose in the bloodstream, a clot can cause a heart attack, stroke or pulmonary embolism.

26 Feb 2008

$High calcium intake may not prevent osteoporosis and related bone fractures$

High calcium intake may not prevent osteoporosis and related bone fractures

For years, getting a lot of calcium has been portrayed as one of the best things you could do to prevent osteoporosis and related bone fractures.

26 Feb 2008

2 oxygenation events in ancient oceans sparked spread of complex life

The rise of oxygen and the oxidation of deep oceans between 635 and 551 million years ago may have had an impact on the increase and spread of the earliest complex life, including animals, according to a study reported in the Proceedings of the National Academy of Sciences online Early Edition during the week of February 25 – 29.

26 Feb 2008

Worm defecation holds clues to widespread cell-to-cell communication process

The focus of two recent Nobel prizes, a species of roundworm has made possible another advance in the understanding of how cells talk to one another, according to a study published online Feb. 21 in the journal Current Biology.

22 Feb 2008

Genetic defect causes immune deficiency and balance disorder

A genetic defect that causes a severe immune deficiency in humans may also produce balance disorders, according to a new study by researchers at the University of Iowa, The Jackson Laboratory and East Carolina University.

21 Feb 2008

Vitamin D isn't just for bones anymore

Researchers at The Rockefeller University Hospital have begun a clinical study to explore a possible connection between vitamin D deficiency and insulin resistance.

21 Feb 2008

Drinking milk may help women lower risk for hypertension

Women who drank more fat free milk and had higher intakes of calcium and vitamin D from foods, and not supplements, tended to have a lower risk for developing hypertension or high blood pressure, according to a new study published in the American Heart Association journal, Hypertension.

21 Feb 2008