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.

Stroke researchers have traced the major cause of the death of brain cells

In the neurological train wreck that is stroke, researchers have traced the major cause of the death of brain cells due to artery blockage or bleeding in the brain.

13 Mar 2006

Menthol discovery could point towards new pain therapies

This new understanding could lead to potential advances in pain therapy, the researchers said. Moreover, the scientists envision that their method may be potentially useful in studying the activation mechanism of other drugs and proteins.

13 Mar 2006

Diabetics shown to have increased heart muscle mass

Diabetes strongly increases the risk of heart failure in all ethnic groups, but early effects of diabetes on the heart may differ depending on whether the subjects are white, African-American, Hispanic or Chinese.

9 Mar 2006

Cornell develops technique for making living, functional cells glow

The development gives researchers insights into how hearts develop in living mouse embryos and could improve our understanding of irregular heartbeats, known as arrhythmias, as well as open doors to observing cellular processes to better understand basic physiology and disease.

9 Mar 2006

Researchers discover cause of episodic ataxia type-2

Researchers at the Albert Einstein College of Medicine of Yeshiva University have discovered the underlying cause of a type of ataxia, hereditary disorders characterized by poor balance, loss of posture and difficulty performing rapid coordinated movement.

7 Mar 2006

Ethnicity the most important personal characteristic in predicting complementary medicine use

A survey of older adults in rural North Carolina shows that they widely use complementary medicine therapies, but tend to focus on folk or home remedies, such as taking a daily "tonic" of vinegar or using Epsom salts.

1 Mar 2006

Girls drinking more sodas and less milk

According to researchers in the U.S. concerns that teens are drinking too many sodas and fruit drinks are well founded.

28 Feb 2006

Spinocerebellar ataxia and other neurodegenerative diseases might be treatable with drugs that alter the activity of potassium channels

For the first time, researchers have linked mutations in a gene that regulates how potassium enters cells to a neurodegenerative disease and to another disorder that causes mental retardation and coordination problems.

27 Feb 2006

New tool to discover molecules that can enhance or block different kinds of tastes

Researchers from the Monell Chemical Senses Center have succeeded in growing mature taste receptor cells outside the body and for the first time have been able to successfully keep the cells alive for a prolonged period of time.

27 Feb 2006

40 percent of Americans at moderate risk for heart disease

"Nearly half the heart attacks come without warning, which means we need to do a better job of screening people. This test has that potential."

23 Feb 2006

Women from Venus love chocolate from Mars

CocoaVia the long-awaited chocolate from confectionery giant Mars is about to hit the market.

22 Feb 2006

$Calcium and Vitamin D helps reduce risk of hip fractures in older women$

Calcium and Vitamin D helps reduce risk of hip fractures in older women

Taking calcium and Vitamin D slightly decreased the risk of hip fractures in older women, but not the risk for other types of fractures or for colorectal cancer, according to the latest findings from the federally funded Women's Health Initiative. Additionally, the supplements slightly increased the incidence of kidney stones.

21 Feb 2006

Calcium plus vitamin-D supplementation does an older body good

The older the woman, the more likely it is that consistent use of calcium and vitamin-D supplements will play a role in reducing her risk for osteoporosis, according to the results of a large national clinical trial conducted as part of the Women's Health Initiative (WHI).

20 Feb 2006

New way to culture adult stem cells from bone marrow

In a significant advance for regenerative medicine, researchers at Rice University have discovered a new way to culture adult stem cells from bone marrow such that the cells themselves produce a growth matrix that is rich in important biochemical growth factors.

16 Feb 2006

Calcium and Vitamin D supplememts of limited benefit to older women

According to researchers at Stanford University Medical Center, older women who regularly take calcium and Vitamin D marginally decrease their risk of hip fractures.

16 Feb 2006

Researchers capture the electrical activity of a single sperm cell

Researchers at Children's Hospital Boston and the Howard Hughes Medical Institute have, for the first time, captured the electrical activity of a single sperm cell. The technically difficult maneuver, reported in Nature, allows the first measurement of the currents that flow across the sperm's outer membrane.

14 Feb 2006

Researchers capture the electrical activity of a single sperm cell

14 Feb 2006

Vitamin D could provide beneficial treatment to prostate cancer

Vitamin D can inhibit the spread of prostate cancer cells by limiting the activity of two specific enzymes, University of Rochester Medical Center scientists report.

14 Feb 2006

Older women who simply reduce the amount of total fat in their diet won't generally lower cancer risk

Older women who simply reduce the amount of total fat in their diet won't generally lower their risk of breast or colorectal cancer or heart disease, according to the latest findings from the federally funded Women's Health Initiative.

9 Feb 2006

High blood pressure and kidney disease increase risk for heart disease and stroke in older Americans

Older Americans with high blood pressure and moderate to severe chronic kidney disease have a greater chance of developing heart disease than people with normal kidney function. This finding is one of three in a new paper published in the Feb. 7 issue of the Annals of Internal Medicine.

7 Feb 2006