Calcium News and Research

RSS

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.

Pulsed ultrasound used to remote control brain circuits

In a twist on nontraditional uses of ultrasound, a group of neuroscientists at Arizona State University has developed pulsed ultrasound techniques that can remotely stimulate brain circuit activity.

29 Oct 2008

FDA warns Bayer HealthCare on over-the-counter aspirin product

The U.S. Food and Drug Administration today sent Warning Letters to Bayer HealthCare concerning two unlawful, over-the-counter (OTC) aspirin products - Bayer Women's Low Dose Aspirin + Calcium (Bayer Women's) and Bayer Aspirin with Heart Advantage (Bayer Heart Advantage).

28 Oct 2008

Near-infrared nanoparticles shine a bright light on cancer

A new nanoparticle-enabled imaging method for breast cancer has been developed by a team of scientists from Penn State. Their research, utilizing encapsulated fluorescent molecules in calcium phosphate nanoparticles and nontoxic near infrared (NIR) imaging, appears in the journal ACS Nano.

27 Oct 2008

Horlicks and Maggi noodle ads banned in Britain

An advert claiming that the bedtime malt drink Horlicks makes children "taller, stronger and sharper" has been banned after it was unintentionally screened on British television.

22 Oct 2008

Study specifies chemical pathway for ions through the cell membrane

Life ultimately depends on the traffic of tiny charged particles through porous proteins studding the membrane surrounding every cell. In research published in Nature, scientists at The Rockefeller University have for the first time mapped a stepping-stone pathway of amino acids that these charged particles, or ions, follow across cell membranes.

13 Oct 2008

Olmesartan may reduce coronary artery plaque

Research presented at the 20th annual Transcatheter Cardiovascular Therapeutics (TCT) scientific symposium, sponsored by the Cardiovascular Research Foundation (CRF), suggests that olmesartan, a drug commonly used to treat high blood pressure, may play a role in reducing coronary plaque

12 Oct 2008

Too many Australian children have an unhealthy lifestyle

A survey on the lifestyle of Australian children has found big changes need to be made if many are to avoid health problems later on in life.

6 Oct 2008

The underdevelopment of a specific brain region may cause schizophrenia

The underdevelopment of a specific region in the brain may lead to schizophrenia in individuals. According to research published today in BioMed Central's open access journal Molecular Brain, dentate gyrus, which is located in the hippocampus in the brain and thought to be responsible for working memory and mood regulation, remained immature in an animal model of schizophrenia.

10 Sep 2008

Receptor activation protects retina from diabetes destruction

A drug known for it pain-relieving power and believed to stimulate memory appears to prevent this retinal damage that leads to vision loss, researchers say.

9 Sep 2008

New nanotechnology paints for hospitals could kill superbugs

New nanotechnology paints for walls, ceilings, and surfaces could be used to kill hospital superbugs when fluorescent lights are switched on, scientists heard today (Wednesday 10 September 2008) at the Society for General Microbiology's Autumn meeting being held this week at Trinity College, Dublin.

9 Sep 2008

Men who have too much calcium in their bloodstreams may increase risk of fatal prostate cancer

Men who have too much calcium in their bloodstreams may have an increased risk of fatal prostate cancer, according to a new analysis from Wake Forest University School of Medicine and the University of Wisconsin.

3 Sep 2008

Exclusive breastfeeding increases child's risk for vitamin D deficiency; black, darker-skinned children already have increased risk

Exclusive breastfeeding can increase a child's risk of developing rickets because breast milk alone does not provide adequate levels of vitamin D, a critical ingredient that helps to absorb calcium and build strong bones, the New York Times reports. Rickets develops when a child's vitamin D levels are too low and is characterized by the curving of a child's legs and the softening of other bones. Some children are asymptomatic.

28 Aug 2008

New kind of bioglass to help bones mend

Scientists at the Nuclear-Magnetic Resonance unit at the University of Warwick have discovered how a high tech glass of milk is helping bones mend.

26 Aug 2008

Variation in Ankyrin 3 gene shows strong association with bipolar disorder

The largest genetic analysis of its kind to date for bipolar disorder has implicated machinery involved in the balance of sodium and calcium in brain cells. Researchers supported in part by the National Institute of Mental Health, part of the National Institutes of Health, found an association between the disorder and variation in two genes that make components of channels that manage the flow of the elements into and out of cells, including neurons.

17 Aug 2008

New plastic film to tackle E. coli

Chemical Engineers in Switzerland have created a plastic film that's up to 1000 times more effective at killing E. coli bacteria cells than conventional methods.

14 Aug 2008

The effect of childhood dairy intake on adolescent bone health

Dairy is recognized as a key component of a healthy, balanced diet. However, until recently it was unclear how long-term dairy intake contributes to the many aspects of bone health in children, including bone density, bone mineral content, and bone area. A new study soon to be published in The Journal of Pediatrics investigates the effect of childhood dairy intake on adolescent bone health.

13 Aug 2008

In-depth review of current research on the health effects of vitamin D

Despite considerable progress in research to understand the health effects of vitamin D, experts convened by the NIH to review the available data found major gaps in the evidence. The data are strongest in the area of bone health among elderly men and post-menopausal women, suggesting that increased vitamin D intake can improve bone health and prevent falls. For other age groups and health issues, though, it is too early to say conclusively whether more vitamin D might be beneficial.

12 Aug 2008