Navigation Links
Calcium during pregnancy reduces harmful blood lead levels
Date:9/9/2008

ANN ARBOR, Mich.---Pregnant women who take high levels of daily calcium supplements show a marked reduction in lead levels in their blood, suggesting calcium could play a critical role in reducing fetal and infant exposure.

A new study at the University of Michigan shows that women who take 1,200 milligrams of calcium daily have up to a 31 percent reduction in lead levels.

Women who used lead-glazed ceramics and those with high bone lead levels showed the largest reductions; the average reduction was about 11 percent, said Howard Hu, chair of the Department of Environmental Health Sciences at the School of Public Health.

Hu is the principal investigator of the study and one of the senior authors on the paper, which is available online in Environmental Health Perspectives, the official journal of the U.S. National Institute for Environmental Health Sciences. Hu, who is also affiliated with the University of Michigan School of Medicine, said this is the first known randomized study examining calcium supplementation on lead levels in pregnant women.

"We and others have previously shown that during pregnancy, mothers can transfer lead from their bones to their unborn -- with significant adverse consequences--making maternal bone lead stores a threat even if current environmental lead exposures are low," Hu said. "This study demonstrates that dietary calcium supplementation during pregnancy may constitute a low-cost and low-risk approach for reducing this threat."

Lead exposure is a great concern for pregnant and lactating women, especially in developing countries where lead exposures have been high until recently, and for women with occupational exposure. Developing fetuses and nursing babies are exposed to lead from either current exposures to mothers or from the mobilization of maternal skeletal lead stores accumulated from prior years of exposure. Bone lead can stay in the body for decades, so even with minimal environmental exposure, the fetus or nursing infant can still be at great risk from maternal stores of lead.

Lead exposure during fetal development and infancy can cause low birth weight or slow weight gain after birth, cognitive defects such as lower intelligence scores, lower motor and visual skills, or even miscarriage. Damage from lead exposure and poisoning is usually permanent.

"The bottom line is that obstetricians and pediatricians should consider adding calcium supplementation to the prenatal vitamins normally recommended in pregnant women, particularly if their patients have a significant history of environmental or occupational lead exposure," Hu said.

The study showed that reductions in blood lead levels were more evident in the second trimester at 14 percent than in the third trimester at 8 percent. The most compliant group of women in the study (those who consumed greater than 75 percent of the assigned 1,200 milligram doses of calcium per day) showed a 24 percent decrease. Women in the most compliant group who also reported using lead glazed ceramics and had the highest bone lead levels saw the greatest reduction of 31 percent.

Researchers analyzed 557 women recruited from the Mexican Social Security Institute prenatal clinics, which treat the low to moderate income population of Mexico City. All were in their first trimester; roughly half were assigned calcium and half a placebo.

This recent study corresponds with a previous study performed by the same group of investigators showing that 1,200-milligram daily calcium supplementation during lactation reduced maternal blood lead by 15-20 percent, and breast milk lead by 5-10 percent. This is the first randomized trial to evaluate the effect of supplementation during pregnancy, when lead is more easily transferred to the fetus, Hu said.


'/>"/>

Contact: Laura Bailey
baileylm@umich.edu
734-764-1552
University of Michigan
Source:Eurekalert

Related medicine news :

1. Study Links Serum Calcium, Prostate Cancer Death
2. Too much calcium in blood may increase risk of fatal prostate cancer
3. New study shows calcium significantly improves childrens bone health
4. Calcium may be the key to understanding Alzheimers disease
5. New study finds coronary arterial calcium scans help detect overall death risk in the elderly
6. Arterial Calcium Scans Can Predict Death Risk
7. New Calcium Measure Better Predictor of Heart Risks
8. Coronary calcium distribution tied to heart attack risk
9. Study shows that administering calcium and magnesium effectively reduces neurological sensitivity
10. African Americans at Risk for Low Calcium Intake - New Survey Finds Those Experiencing Symptoms of Lactose Intolerance May be Sidelining Dairy in Their Diets
11. Calcium Scans Help Predict Coronary Risk
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/29/2016)... ... April 29, 2016 , ... ... Council for Graduate Medical Education (ACGME) that it has received accreditation for its ... accreditation of three residency programs that Memorial is currently pursuing, including Pediatrics and ...
(Date:4/29/2016)... ... April 29, 2016 , ... On Tuesday, April 26, 2016 members of the ... signature of Gov. Nathan Deal on SB 258, the “Rural Health Care Relief” Bill. ... a 70% tax credit to individuals and corporations which donate directly to a “rural ...
(Date:4/29/2016)... ... April 29, 2016 , ... The White House announced efforts ... more information about their loan terms and accounts, and more protections for borrowers. ... federal and private loans, has reached $1.3 trillion, with 43 million Americans holding ...
(Date:4/29/2016)... Petersburg, Fla. (PRWEB) , ... April 29, 2016 ... ... Children’s Hospital surgeon reveals that infants born with severe congenital diaphragmatic hernia have ... babies is born with congenital diaphragmatic hernia (CDH)—a condition where the diaphragm fails ...
(Date:4/29/2016)... ... 29, 2016 , ... Mobility Designed is redefining mobility with their patent ... M+D Crutch evenly distributes body weight from the elbow to the forearm. In ... crutches than with other crutches. , Co-founders Max and Liliana Younger were inspired to ...
Breaking Medicine News(10 mins):
(Date:4/27/2016)... , April 27, 2016 ... accelerator (MR-linac) platform will be the focal point of ... of the European Society for Radiotherapy & Oncology, taking ... MR-linac integrates a state-of-the-art radiotherapy system and a high-field ... to clearly see the patient,s anatomy in real time. ...
(Date:4/27/2016)... 2016 Tie-up with Government hospitals ... to save newborns   Fortis La Femme, ... in collaboration with Breast Milk Foundation (BMF), a non-profit organization ... Milk Bank, ,Amaara, in Delhi-NCR today. This non-profit centre recognizes ... infants and should be available to babies deprived of mother,s ...
(Date:4/27/2016)... Research and Markets has ... Disposables Market 2016-2020"  report to their offering.  ... global anesthesia disposables market is set to ... the period 2016-2020.  Healthcare-acquired infections ... safety. Organizations like the CDC and Public ...
Breaking Medicine Technology: