Navigation Links
Genes Influence Vitamin D Levels, But Only in Winter: Study

MONDAY, Nov. 29 (HealthDay News) -- Genetics influence a person's vitamin D levels during the winter while other factors have the greatest impact in the summer, the results of a new study indicate.

Vitamin D, which is needed to maintain health and for strong bones, is naturally made by the body when exposed to sunlight. Most foods do not contain vitamin D unless it's added by fortification.

Emory University researchers checked 310 identical twins and 200 nonidentical twins, average age 55, for blood levels of 25-hydroxyvitamin D, a marker of exposure to vitamin D.

Average levels were adequate, but levels were higher in the summer than in the winter. The researchers said 70 percent of the variation in vitamin D concentrations in the winter could be attributed to genetic factors.

However, none of the variation in the summer was due to genetics, but rather to environmental conditions such as sunlight exposure and latitude, and other lifestyle factors such as the amount of vitamin D in the diet.

The study, by Dr. Cristina Karohl and colleagues, is published in the December issue of the American Journal of Clinical Nutrition.

Further studies to learn more about how all these factors influence vitamin D levels would be useful for public health experts as they consider ways to ensure adequate vitamin D levels in all populations, the study authors noted in a news release from the journal's publisher.

More information

The U.S. National Institutes of Health has more about vitamin D.

-- Robert Preidt

SOURCE: American Journal of Clinical Nutrition, news release, Nov. 18, 2010

Copyright©2010 ScoutNews,LLC.
All rights reserved  

Page: 1

Related medicine news :

1. Genes Play Role in Prognosis With Non-Small Cell Lung Cancers
2. Researchers Who Discovered First Genes for Stuttering will Present Findings to the National Stuttering Association
3. Genes, environment, or chance?
4. UCLA study reveals how genes interact with their environment to cause disease
5. Long-Distance Runners May Have Endurance in Their Genes
6. Genes Behind Tooth Development Discovered
7. Smoking significantly increases risk of aneurysm in people with certain genes
8. Increasing neurogenesis might prevent drug addiction and relapse
9. Genetic Disease Foundation Encourages Americans to Know Their Genes at in Observance of World Rare Disease Day
10. Cluster of Genes Tied to Alcoholism
11. Cardiogenesis Reports Fourth Quarter and Full-Year 2009 Results
Post Your Comments:
Related Image:
Genes Influence Vitamin D Levels, But Only in Winter: Study
(Date:11/24/2015)... ... November 24, 2015 , ... ... their Black Friday sale a week early, offering 40% off select bras and ... intimate apparel industry through both mobile fit technology and the latest fashion, quickly ...
(Date:11/24/2015)... ... November 24, 2015 , ... DMG Productions announced that they will ... first quarter 2016 via Discovery Channel. Dates and show times TBA. , Aphria, Inc., ... in the business of producing and supplying medical marijuana pursuant to the Marijuana for ...
(Date:11/24/2015)... City, UT (PRWEB) , ... November 24, 2015 , ... ... Forbes Magazine. For a business, it is critical that the first impression be positive ... business, they are not likely to buy anything or want to return. They will ...
(Date:11/24/2015)... Richey, FL (PRWEB) , ... November 24, 2015 , ... ... deems a growing epidemic as deaths from prescription opioids in the United States grew ... and cocaine. In 2013 alone, opioids were involved in 37 percent of all fatal ...
(Date:11/24/2015)... ALEXANDRIA, VA (PRWEB) , ... November 24, 2015 ... ... encourages people across the United States to support their local poison centers through ... been designated as #GivingTuesday: calls it “a day that inspires people to ...
Breaking Medicine News(10 mins):
(Date:11/24/2015)... -- The uptake of recently approved and pipeline premium products ... market growth to 2021, says GBI Research . ... for Type 1 Diabetes Mellitus (T1DM), will be a key driver of ... --> The uptake of recently approved and pipeline premium ... of market growth to 2021, says GBI Research ...
(Date:11/24/2015)... 24, 2015   Renowned ... deliver s advice and insights on ... More than 50% of Dubai ... according to the DHA   femMED launches comprehensive solutions for ... Dubai residents are not consuming enough to keep ...
(Date:11/24/2015)...  Freudenberg Medical has developed specialty tubing for an inexpensive, ... facilities. Africa and ... Nevertheless, prompt diagnosis is important to treat those affected and ... the help of a portable mini-lab or "lab on a ... affected areas and perform rapid testing for HIV. They do ...
Breaking Medicine Technology: