The Global City
Home The Cities eTrade eTourism Archive About Us Contact Us
No Ads
eTrade Contacts
Major ProductsLocation Of SuppliersExport Markets
Trade FairsForeign Buyers GuideEmbassies
Trade Related Government Regulations & PoliciesCalendar Of EventsGovernment Offices Directory
General Info

eTourism Contacts
MuseumsHotelsResorts
HospitalsCity FestivalsEmergency Numbers
Tourist OperatorsTourist AttractionsSpecial Areas Of Interest
Accredited Travel AgenciesTourism Related Government Regulations & PoliciesUniversities
TransportationGovernment Tourism OfficesGeneral Info

Calendar of Events Contacts
Cultural Calendar

Cultural Calendar Contacts

eTrade Contacts

Article: Why this Vitamin is D Nutrient of the Year - 02 Aug 2010
Vitamin D is shaping up to be the nutrient of the year if not the decade. It is, of course, best known for the key role it plays in bone health without it calcium cannot be absorbed, and the risk of osteoporosis and fractures increases. But evidence that links vitamin D deficiency with many other health problems continues to accumulate. In the past year alone, higher vitamin D levels have been linked with a reduced risk of fracture, lower susceptibility to colds and flu, better brain function, and a lower percentage of body fat in women. Yet, despite growing evidence that vitamin D makes a vital contribution to good health as we age, itís thought that more than 1/10 of older adults now have vitamin D levels associated with higher risks for various diseases, and that few have optimum levels. Since there are vitamin D receptors all over the body in the muscles, joints, brain, and other organs low vitamin D levels have a systemic effect (they are also linked with colon cancer, breast cancer, a weakened immune system, and poorer brain function).  
WHAT RESEARCH SHOWS The picture of vitamin Dís health benefits beyond bones has been drawn mainly from epidemiologic and observational investigations. The findings of such studies can suggest correlations between disease risk and certain factors sun exposure or blood levels of vitamin D, for example but they donít prove cause and effect. More trials are needed to elucidate vitamin Dís benefits and risks at different doses and in different populations. Most experts, however, have found the evidence strong enough to raise the recommended daily intake of vitamin D to 800 IU (international units), a level high enough to prevent deficiency even in people who get little or none of the vitamin through sunlight. That level can help strengthen bones and muscles, but whether it can ward off chronic disease is less clear. With that in mind, hereís a rundown of the areas in which vitamin D shows disease-fighting promise. ē Bone health. The bone-building minerals calcium and phosphorus rely on vitamin D for absorption. A review of 167 studies found that people who got at least 700 IU of the vitamin and took calcium pills had denser bones and fewer fractures than those who didnít take the vitamin D supplements. ē Muscular strength. Studies have shown that deficiency in the vitamin decreases muscular strength and performance. ē Cancer. Vitamin D helps regulate cell growth and so may inhibit the formation or spread of cancer cells. Some population-based studies have linked deficiency of the vitamin to an increased risk of breast, colon, and prostate cancer as well as higher mortalities from those cancers. ē Cardiovascular disease. Low levels of the vitamin may inflame the coronary arteries, which has been linked to increased risk of heart attack. ē Autoimmune diseases. Deficiencies can weaken the bodyís response to infection. Population data suggest that as vitamin D levels go down, the risk of rheumatoid arthritis go up. A few studies have linked deficiency of vitamin D to an increased risk of insulin resistance or type 1 diabetes. A 2006 study associated higher blood levels of vitamin D with a reduced risk of multiple sclerosis. ē Cognitive function. A recent study of about 1,300 people, 65 years old and older, associated low blood levels of vitamin D with an increased risk of depression. Several studies, including three published in 2009, linked low vitamin D levels to reduced cognitive performance in older people. IN SEARCH OF VITAMIN D Vitamin D is unique in that your skin manufactures it just by being exposed to the UVB rays of the sun. Many factors however, can affect this process. If you walk in the early morning or late afternoon, for example, the sun is usually not intense enough to stimulate production of the vitamin. Other factors can slow or even shut down your skinís vitamin D factory, including sunscreen and protective clothing, or being older or overweight (fat holds onto vitamin D, making it less available to the body). As you age, your skinís ability to convert UVB rays into vitamin D declines, so itís almost impossible to get enough vitamin D from sun exposure. In addition, dark-skinned individuals do not readily absorb UVB rays and therefore are at higher risk for vitamin D deficiency. Experts suggest that if you want to use the sun as one of your sources of vitamin D, then you must get out in the sun three times a week for 15 minutes between 10 a.m. and 2 p.m. without sunscreen. But the specter of skin cancer looms large and most health and medical organizations discourage any unprotected sun exposure. Lack of sun exposure would be less of a problem if diet provided adequate vitamin D. But there arenít many vitamin D-rich foods (see chart) and you need a lot of them to get your needed daily allowance. Dairy products as well as some breakfast cereals, orange juices, soy-based foods, and other products are fortified with about 100 IU a serving. But most people donít eat enough of those foods to consistently cover all their requirements. People who have trouble absorbing fat such as those with Crohnís disease or celiac disease canít get enough vitamin D from the diet no matter how much they eat (vitamin D requires some dietary fat in the gut for absorption). And people with liver or kidney disease are often deficient in vitamin D, because these organs are necessary to convert the precursor to the active form of the vitamin, whether it comes from the sun or from food. Manufacturers of multivitamin and calcium supplements have increased the amount of vitamin D in many of their products to 800 IU. If you donít already take one of these, you can buy vitamin D supplements relatively inexpensively. Consider looking for ones that contain vitamin D3, which is more potent than D2. Growing awareness of vitamin Dís benefits, coupled with the risk of vitamin D deficiency, has led some experts to recommend a blood test that assesses the amount of vitamin D in the body. The test measures the concentration of 25-hydroxyvitamin D3 or 25(OH)D, the precursor produced by the skin and converted by the body to vitamin D. Although there is no agreement on what should be the optimal level of 25(OH)D, deficiency is generally defined as a blood level less than 20 nanograms per milliliter, or 20ng/mL (see chart). Levels that low have been linked to poor bone density, falls, fractures, cancer, immune dysfunction, cardiovascular disease, and hypertension. Many experts recommend a level of at least 32 and suggest that 800 to 1,000 IU of vitamin D per day is required to maintain that level. HOW MUCH VITAMIN D SHOULD YOU TAKE? The official recommended daily intake for vitamin D, devised by the US Institute of Medicine, is 200 IU for people 50 and younger, 400 IU for those 51 to 70, and 600 IU for those 71 and older. Most people donít consume that much vitamin D, unless they drink lots of milk and/or take a multivitamin. However, many researchers now believe that these guidelines are too low, and that a better goal for everyone, especially those over 60 and/or with darker skin, is 800 to 1,000 IU a day. Some people with low blood level of vitamin D may need even higher intakes to reach the desirable range. Thus, 15 leading nutrition experts have urged the Institute of Medicine to increase its recommended intakes of vitamin D. Meanwhile, the Canadian Cancer Society now advises all Canadian adults to take 1,000 IU of vitamin D a day during fall and winter, and older and dark-skinned people to take this much year round. When shopping for a supplement, read the fine print: Look for D3 (also called cholecalciferol), which is more potent than D2 (ergocalciferol). Do not take cod liver oil for its high levels of vitamin D, since itís also rich in vitamin A, which may weaken bones if you overdose. Eat fatty fish instead, which is rich in vitamin D but not in vitamin A. The official ďupper limitĒ for vitamin D, set many years ago, is 2,000 IU a day. Itís possible to get that much, or more, if you consume milk, other fortified foods, and fatty fish, and also take a multivitamin and combined calcium/vitamin D supplement. However, a review article in the American Journal of Clinical Nutrition last January 2008 concluded that vitamin D is not toxic up to 10,000 IU a day. Experts donít recommend that much, but you neednít worry if you get somewhat more than 2,000 IU. Bottom line: Itís too early to recommend vitamin D testing for everyone. The large, long-term clinical studies that would justify routine screening have not yet been done. But talk to your doctor about testing, especially if you are over 60, for instance, or have low bone density. In any case, consider taking 800 to 1,000 IU of supplemental vitamin D a day. For most people, that should raise blood levels to the desirable range (above 30 ng/mL) or at least close to it. * * * Resources: ďVitamin D: Are you getting enough?Ē UC Berkeley School of Public Health Publication, February 2008; ďVitamin D offers myriad benefits,Ē Weill Cornell Medical College Womenís Health Advisor, June 2009; ďVitamin Dís effects go far beyond strong bones.Ē Mount Sinai School of Medicine Focus on Healthy Aging, December 2009 Source: PhilSTAR.com , Health and Family Section, 28 July, 2010
Posted By: Tyrone M. Reyes, MD 
 
Date  Title  Action
Article 
04 Oct 2010  BUSINESS DIRECTORY: WEARABLES  View
05 Sep 2010  LandBank Joins Strategic Sanitation Planning  View
25 Aug 2010  Popular Churches in Manila  View
02 Aug 2010  Why this Vitamin is D Nutrient of the Year  View
01 Aug 2010  Opportunity in Business: CONSTRUCTION MATERIALS  View
28 Mar 2010  History of Manila  View
20 Jan 2010  PhilCTTIS Business Directory: Rattan Suppliers  View
20 Jan 2008  PhilCTTIS Business Directory: Aquaculture Equipment Suppliers  View
25 Nov 2007  Hotels in City of Manila  View
27 Oct 2007  Museums  View
27 Oct 2007  Hospitals  View
27 Oct 2007  Tourist attractions  View
25 Sep 2007  Laws and Incentives Covering Tourism Investments  View
Event 
26 Nov 2010  Central Luzon, Nueva Vizcaya bag NorthPhil Expo awards   View
18 May 2008  5th IFEX 2008 : May 16-18  View
13 Jan 2008  JANUARY Cultural Calendar  View
News 
16 Nov 2012  IMF chief lauds Phl's economic policies   View
22 Mar 2011  Exports in 2010 break all previous records  View
08 Feb 2011  Climate change-ready crops developed  View
26 Nov 2010  Philippines 4th among world's top remittance recipients   View
15 Nov 2010  Electronics sector sees exports hitting $50 billion   View
04 Nov 2010  Pure Foods to raise P50 billion for expansion   View
04 Nov 2010  Gross revenue index of industries up in second quarter   View
27 Sep 2010  ERC Okays NGCP Visayas Expansion  View
27 Sep 2010  BPO Expands RP Facility Into Its Asia-Pacific Hub  View
09 Sep 2010  RP export earnings rise 35.9% in July   View
16 Aug 2010  Exporters plan to raise 2010 growth target  View
06 Aug 2010  Tetra Pak sees RP milk consumption to grow due to changing lifestyles  View
05 Aug 2010  Govt eyes P6Billion from Privatization in 2011  View
05 Aug 2010  Filipino invention uses mobile tech to help indigent amputees  View
04 Aug 2010  Glad joins in 're-greening' Mulanay beach   View
04 Aug 2010  Splash puts up unit for Vietnam expansion  View
02 Aug 2010  Libanan vows tie with NGOs to thwart human trafficking  View
20 May 2008  Developed markets to turn to East, South Asia for new talents  View
10 May 2008  British government provides technical assistance to RP  View
05 May 2008  Banks? microfinance loans reached P6 billion in 2007  View
06 Apr 2008  DLSU study finds trade secrets of Asian agro-food companies  View
06 Apr 2008  Filipino gets US award for excellence in medicine  View
29 Feb 2008  DOT Embarks On Selling Mission To Scandinavian Region  View
27 Feb 2008  DOT Serves Up Culinary Tourism Anew  View
17 Feb 2008  Remittances at record $14.4b  View
09 Feb 2008  Key players launch Rich Communication Suite initiative  View
09 Feb 2008  BSP to review effects of peso rise on exports  View
09 Feb 2008  Filipino invents Vitamin Beer and wins gold in Bangkok  View
03 Feb 2008  Senate urged to ratify Kyoto Convention  View
25 Jan 2008  Dutch firm ties up with auto parts maker for electric jeepney  View
12 Jan 2008  The health benefits of green tea extract  View
12 Jan 2008  Having Fun with IT: Capture it and share it  View
02 Dec 2007  Auto parts makers optimistic of double digit growth in sales  View
01 Dec 2007  Teves says TransCo sale could top $3B  View
30 Nov 2007  International College of Surgeons Philippine Section at 58  View
15 Nov 2007  RP nominated as Asian Spa Capital of Year  View
10 Nov 2007  Filipino construction sector eyes business in Bahrain  View
28 Oct 2007  Toyota Motors reviews overall ASEAN operations  View
28 Oct 2007  SME exporters halt taking buying orders due to strengthening peso  View
13 Oct 2007  Flying V: Oil import tariff cut seen to stabilize prices  View
No Ads
   
Logos and trademarks are the property of their respective owners.
Philippine Cities Trade & Tourism Information Service (c) Copyright 2007, all rights reserved.