Navigation Links
One size doesn't fit all for vitamin D and men
Date:9/20/2011

CHICAGO --- African-American men living in areas with low sunlight are up to 3 times more likely to have Vitamin D deficiency than Caucasian men and should take high levels of Vitamin D supplements, according to a new study from Northwestern University Feinberg School of Medicine.

"This study shows that the current one-size fits all recommendations for 600 International Units (IU) of Vitamin D don't work," said Adam Murphy, M.D., a clinical instructor in urology at Northwestern's Feinberg School. "Skin color and sunlight exposure need to be considered for recommended daily allowances of Vitamin D."

Vitamin D deficiency causes brittle bones and has been linked to such diseases as prostate cancer, diabetes, rheumatoid arthritis and multiple sclerosis.

African-American men have lower levels of Vitamin D because the increased melanin in darker skin blocks the ultraviolet rays necessary for the body to produce the vitamin, Murphy said. Thus, African-American men require up to six times more sun exposure than Caucasian men to make adequate Vitamin D levels.

"It takes a dark-skinned male like myself 90 minutes three times a week to absorb enough sunlight to produce the recommended amount of Vitamin D compared to just 15 minutes three times a week for a Caucasian male," said the Chicago-based Murphy, who also is a physician at Jesse Brown VA Medical Center.

African-American men living in Chicago would need to take nearly 2,500 IU's of Vitamin D to reach normal, healthy levels, Murphy said.

Murphy, who presented the research at the American Association of Cancer Researchers Health Disparities Conference in Washington, D.C., collaborated on the study with Rick Kittles, associate professor of medicine at the University of Illinois at Chicago, and the Northwestern Medical Faculty Foundation department of urology.

The Institute of Medicine recommends adults and children take 600 International IUs of Vitamin D daily, but Murphy says that's way too low.

All men living in the northern third of the country "from Northern California all the way to Virginia" need to increase their Vitamin D supplementation, Murphy said. But the amount likely varies by region because Chicago residents, for example, aren't outdoors as much as those who live in Washington or California.

For the study, blood samples were collected from 492 men ages 40 to 79 from three Chicago urology clinics along with demographic and medical information such as body mass index, skin melanin content, sunlight exposure and Vitamin D intake. In the study, 63 percent of African-American men were Vitamin D deficient compared to 18 percent of Caucasian men using the Institute of Medicine minimum recommendation of 20 nanograms per milliliter (ng/ml) of Vitamin D. African-American heritage, a high body mass index and lack of Vitamin D supplementation all were associated with Vitamin D deficiency.

Using the commonly used 30 ng/ml deficiency cutoff, 93 percent of African-American men were deficient in Vitamin D compared to 69.7 percent of Caucasian men.

Researchers found African-American men had an average of 17.2 ng/ml of Vitamin D in their blood serum, which is below the Institute of Medicine minimum recommendation. "When Vitamin D levels in the bloodstream are less than 20 ng/ml the bone starts to become brittle in adults and in kids it causes rickets," Murphy said.

Caucasian men had an average level of 24.2 units of Vitamin D in their blood.


'/>"/>

Contact: Marla Paul
marla-Paul@northwestern.edu
312-503-8928
Northwestern University
Source:Eurekalert

Related medicine news :

1. Lymph Node Test Doesnt Improve Breast Cancer Care, Study Finds
2. Confirmation that vitamin D acts as a protective agent against the advance of colon cancer
3. Vitamin D Levels Linked to Certain Skin Cancers, Study Finds
4. Gazpacho ingredients lose vitamin C during preparation
5. Smokers Mistakenly Believe Vitamins Protect Them From Cancer
6. Licence to smoke: Taking vitamin pills may undermine motivation to reduce smoking
7. Vitamin D relieves joint, muscle pain for breast cancer patients
8. Psoriatic Arthritis Patients Seem to Lack Enough Vitamin D
9. Vitamin D lower in NFL football players who suffered muscled injuries, study reports
10. Vitamin D, Calcium Combo May Halve Melanoma Risk in Some Women
11. New Guidelines Put Focus on Vitamin D Deficiency
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:5/27/2016)... ... ... Beleza Medspa has initiated a new program to assist active duty ... that Coolsculpting is being used for for more than just cosmetic purposes. ... prescribed body-fat standard, measured by the circumference-based tape method. The tape-test is used ...
(Date:5/27/2016)... ... 27, 2016 , ... Aimed at nurses and employees in the health care ... leaders in the nursing and health care industry. It also provides insight to the ... University. , As the nursing industry is coming out of one of the ...
(Date:5/27/2016)... ... ... With a team of certified experts, Validation Center is ... GMP accreditation, Validation Center is also a registered authority of the international system ... Validation Center is ISO17025 accredited and only offers its clients the latest technology, ...
(Date:5/26/2016)... ... ... There are many ways to cook a hot dog, but new research ... their dogs straight off the grill. Of the 90 percent of Americans who say ... a hot dog, far outpacing other cooking methods such as steaming (12 percent), microwaving ...
(Date:5/26/2016)... ... May 26, 2016 , ... Cabot Corporation, Pfizer, and 3M ... to court documents and SEC filings. A jury has returned a verdict ... Optical Corporation, Case No. BC588866, Los Angeles County, California. The jury awarded $22.8 ...
Breaking Medicine News(10 mins):
(Date:5/25/2016)... FDA 510(k) clearance covers ... for urological and surgical applications Mauna ... Cellvizio®, the multidisciplinary confocal laser endomicroscopy (CLE) platform, ... US with the 12 th 510(k) clearance ... This new FDA clearance covers Confocal Miniprobes indicated ...
(Date:5/25/2016)... -- According to Kalorama Information, the world market for ... these are challenging times in the market, there ... companies that remain optimistic and seek innovation.  Toward ... medical device companies spend a higher percentage of ... do companies in other industries.  Also, in addition ...
(Date:5/25/2016)... PARIS , May 25, 2016 ... system disorders, announces that an oral presentation entitled "High doses ... the MS-SPI trial" will be given by Professor Ayman ... the 2nd Congress of the European Academy of Neurology (EAN) ... "MS and related disorders 3" will take place on Sunday, ...
Breaking Medicine Technology: