Navigation Links
Vitamin D: More may not be better
Date:5/1/2013

In recent years, healthy people have been bombarded by stories in the media and on health websites warning about the dangers of too-low vitamin D levels, and urging high doses of supplements to protect against everything from hypertension to hardening of the arteries to diabetes.

But new research from Johns Hopkins finds that blood levels of the so-called "sunshine vitamin" higher than the top of the range suggested by the Institute of Medicine confer no additional benefit. This finding, combined with results of a previous study by the same group noting potential harm from higher vitamin D levels in healthy people, has urged investigators to prescribe caution.

"Healthy people have been popping these pills, but they should not continue taking vitamin D supplements unchecked," says study leader Muhammad Amer, M.D., M.H.S., an assistant professor in the Division of General Internal Medicine at the Johns Hopkins University School of Medicine. "At a certain point, more vitamin D no longer confers any survival benefit, so taking these expensive supplements is at best a waste of money."

Amer stresses that there are some groups of people elderly, postmenopausal women, and people with kidney disease who do benefit from higher blood levels of a vitamin vital to bone health. Such groups may need to take supplements.

In an article published online in the American Journal of Medicine, Amer and Rehan Qayyum, M.D., M.H.S., also of Johns Hopkins, describe their review of data from more than 10,000 participants in the National Health and Nutrition Examination Survey (NHANES) from 2001 to 2004. They matched those data with mortality data from the National Death Index through Dec. 2006.

When they looked at deaths from all causes and cardiovascular disease specifically, those with blood levels of 21 nanograms per milliliter of 25-Hydroxyvitamin D at the top of the range that the IOM considers "adequate" and at the low end of "
'/>"/>

Contact: Stephanie Desmon
sdesmon1@jhmi.edu
410-955-8665
Johns Hopkins Medicine
Source:Eurekalert

Page: 1 2

Related biology news :

1. The right amount of vitamin D for babies
2. Low vitamin D levels a risk factor for pneumonia
3. Researchers pinpoint upper safe limit of vitamin D blood levels
4. Zebrafish study suggests that vitamin B2 (riboflavin) is an antidote to cyanide poisoning
5. Optimal vitamin D dosage for infants uncertain
6. Vitamin E identified as potential weapon against obesity
7. Quit smoking? Vitamin E may give extra boost to heart health
8. Excess vitamin E intake not a health concern
9. Vitamin P as a potential approach for the treatment of damaged motor neurons
10. Vitamin D benefits breathing in tuberculosis patients
11. Living in a sunny climate does not improve vitamin D levels in hip fracture patients
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:12/19/2014)... MOUNTAIN VIEW, Calif. , Dec. 18, 2014  23andMe, Inc., ... a study that pinpoints fine-scale differences in genetic ancestry of ... Since immigrants first arrived more than four hundred ... served as a meeting place for peoples from different continents. ...
(Date:12/17/2014)... , Dec. 15, 2014  HITLAB SM announced ... audit to confirm its adherence to current U.S. Food ... to conduct regulated smart device and smart phone application ... research quality. "HITLAB is determined to improve ...
(Date:12/15/2014)... Research and Markets ( http://www.researchandmarkets.com/research/87pph8/global_facial ) has ... Market 2015-2019" report to their offering. ... is a technology used for the identification of individuals. ... a person such as nose, jaw edges, mouth, and ...
Breaking Biology News(10 mins):23andMe Study Sketches Genetic Portrait of the United States 223andMe Study Sketches Genetic Portrait of the United States 323andMe Study Sketches Genetic Portrait of the United States 4HITLAB Completes GCP Audit for FDA Smart Device & App Compliance 2Global Facial Recognition Market 2015-2019: Key Vendors are 3M Cogent, Cognitec Systems, NEC and Safran Group 2Global Facial Recognition Market 2015-2019: Key Vendors are 3M Cogent, Cognitec Systems, NEC and Safran Group 3
... of its strategic plan, " Forging the Future A ... Genome Institute (DOE JGI) has positioned itself to provide the ... they can address pressing energy and environmental scientific challenges. ... the launch of the Emerging Technologies Opportunity Program (ETOP) ...
... Once famously described as "orphan diseases, too small to ... Hollywood drama "Lorenzo,s Oil," rare diseases are getting unprecedented ... research efforts and marketing new medicines that promise fuller ... conditions. That,s the finding of a major examination, ...
... own function by "accelerating and braking" is important basic knowledge ... cells are tweaked to produce more bioenergy. In a study ... Uppsala and Ume universities show a model of how cells, ... system similar to what can be found in today,s smartphones. ...
Cached Biology News:The DOE Joint Genome Institute expands capabilities via new partnerships 2The DOE Joint Genome Institute expands capabilities via new partnerships 3Cells must use their brakes moderately for effective speed control 2
(Date:1/22/2015)... Jan. 22. 2015  Varian Medical Systems (NYSE: VAR ... honored for its commitment to sustainability with inclusion on a ... the highest ranked healthcare equipment company among the Corporate Knights ... World Economic Forum at Davos, Switzerland . ...
(Date:12/25/2014)... (PRWEB) December 25, 2014 The report ... by Product Type & Provider Type - Global Advancements, ... market with an in-depth analysis and forecasting of revenues. ... spread through 221 pages and in-depth TOC on “Service ...
(Date:12/24/2014)... Texas , Dec. 24, 2014  Vermillion, Inc. ... on gynecologic disease, announced today that the Company ... including Oracle Investment Management, Jack W. Schuler ... Total proceeds were $10.5 million, before offering expenses.  ...
(Date:12/24/2014)... Louis, Missouri (PRWEB) December 23, 2014 GMO ... biotechnology company, Syngenta, are in the process of being consolidated ... case is In Re: Syngenta AG MIR 162 Corn Litigation, ... District of Kansas. , Management of the Syngenta GMO corn ...
Breaking Biology Technology:Varian Honored Among World's 100 Most Sustainable Corporations 2Service Quality Management Market worth $2.1 Billion & Telco Customer Experience Management Market worth $2.3 Billion by 2019 – New Report by MarketsandMarkets 2Service Quality Management Market worth $2.1 Billion & Telco Customer Experience Management Market worth $2.3 Billion by 2019 – New Report by MarketsandMarkets 3Service Quality Management Market worth $2.1 Billion & Telco Customer Experience Management Market worth $2.3 Billion by 2019 – New Report by MarketsandMarkets 4Vermillion Announces Closing of Equity Financing 2Vermillion Announces Closing of Equity Financing 3Carey Danis & Lowe Reports on Syngenta GMO Corn Transfer Order 2
... BOZEN, Italy, November 4 Health Robotics today ... Workflow Engine at,the American Society of Health-System Pharmacists, Mid-Year ... the i.v.SOFT Workflow Engine,Health Robotics becomes the first and ... solution to fill the void of automated process control ...
... , SEOUL, South Korea, Nov. 4 RNL BIO Co., ... cell therapeutics announced today that it treated an American college ... gained her hearing back in two months after treatment. , ... music at University of Arizona was suffering from autoimmune hearing ...
... ... new treatment program for FIV and FELV , ... New York, N.Y. (PRWEB) November 4, 2009 -- IMULAN BioTherapeutics, LLC has developed ... to get LTCI for feline immunodeficiency virus (FIV) and feline leukemia virus (FeLV). Like Human ...
Cached Biology Technology:Health Robotics Announces December Launch of the i.v.SOFT(TM) Workflow Engine at ASHP in Las Vegas 2Health Robotics Announces December Launch of the i.v.SOFT(TM) Workflow Engine at ASHP in Las Vegas 3RNL BIO Rescues a College Student from Autoimmune Hearing Loss 2RNL BIO Rescues a College Student from Autoimmune Hearing Loss 3RNL BIO Rescues a College Student from Autoimmune Hearing Loss 4New Program Developed in the Fight Against Feline Aids 2
Although each Beacon 2000 System includes one preinstalled sample chamber (size specified at time of order), optional chambers are available and easily retrofit by the user....
... technology incorporating the sophisticated DirectDrive architecture ... new Varian NMR System is undeniably ... ,The Varian NMR System features parallel ... channel, providing pulse sequence programming power ...
... vitro cell labeling mix, 92.5 ... solution stabilized with 0.1% 2-mercaptoethanol ... 3,4-dicarboxylic acid. *Amino acid mixture ... containing l-[35S]Methionine and l-[35S]Cysteine. * ...
... wells. ELISA.Specific for total MMP-3: Recognizes proMMP-3, ... with MMP-1, -2, -9. Range: 3.75-120 ng/ml. ... culture supernatant, serum, plasma and tissue samples.~ ... Category: Drug Screening & Cellular Assays, ...
Biology Products: