News / Africa

    Scientists Suggest Adding Selenium to Diets in Malawi

    x

    Multimedia

    Audio
    Kim Lewis
    Scientists say adding a naturally-occurring mineral to fertilizers could help reduce disease and death among Malawians.   It’s all part of an international study conducted by researchers at the University of Nottingham in the U.K. on the nutritional value of soil in Malawi.  The report has found that dietary deficiency of the mineral selenium, which plays a vital role in keeping the immune system healthy, is endemic in Malawi.  

    The study, which was published in the journal Scientific Reports, found that most Malawi soils do not have an adequate amount of selenium required for human nutrition. In the report, researchers are calling for further investigation into the benefits and costs of enriching crops with selenium through fertilizers. 

    Dr. Martin Broadley, one of the lead researcher of the study at the University of Nottingham’s school of biosciences said, “one of the issues is the natural acidity of the soil in Malawi and in many areas.  So it may be that there is rather a lot of selenium around in terms of the total concentration in the soil, but in terms of the amount of selenium that is available to be taken up by plants, that could be very, very low.”     

    The study examined the diet and nutritional status of a total of 120 relatively healthy women between 18 and 50 years of age living in villages in Zombwe in northern Malawi and Mikalango in the south.

    “It was a joint study with several collaborating groups in Malawi itself, and we were working with the Ministry of Health, and with Lilongwe University. Our colleagues from those organizations spent a period of time in the homes of volunteers from two different regions:  one region where the soils were very, very acidic, and where we had previously observed very low transfer of the element  selenium into the local crop, and one area where the soils were much more alkaline,” explained Broadley.

    “Our colleagues,” he continued, “spent time and a period of 24 hours with each of the volunteers of the study and were able to collect samples of food and drink that were consumed in the home over that period.  And we were also able to collect blood and urine samples from the volunteers.”

    Generally speaking, scientists have found that a lack of proper levels of selenium in the body adversely affects the immune system.  As a result, people tend to be more susceptible to infectious diseases and cardiovascular problems.  One example of where enriched crops are showing success is in Finland.

    “For the past 30 years, they have been using micronutrients, enriched fertilizers, to make sure that adequate levels of selenium were going into the diet.  So the technology is in place.  What isn’t known is the benefit cost of analysis of adopting something like this approach, said Broadley.

    In Malawi, the staple maize, dominates the diet.  But, Broadley said the key to a healthier diet and to getting more selenium is to eat a larger variety of foods.

    “People have to try and diversify their diets as much as possible, and that may mean trying to eat more fish, or more animal produce of some description, or more vegetables, or more nuts—that type of thing, which general have high levels of selenium in them.  And we’re going to be a long way short of adequate intakes without some radical changes in the intakes of the Malawi population.  And, again, you are dealing with a situation in Malawi where many people are living on extremely low income levels, and don’t have access to sufficient purchasing power to be able to afford to buy such a diverse range of foods,” Broadley explained.  

    He also pointed out that a lot more research needs to be conducted to identify whether the cost of adding or changing the existing fertilizer practices in Malawi would be the most beneficial approach to improving the nutritional value of crops.

    You May Like

    Chechen Suspected in Istanbul Attack, but Questions Remain

    Turkish sources say North Caucasus militants involved in bombing at Ataturk airport, but name of at least one alleged attacker raises doubts

    With Johnson Out, Can a New ‘Margaret Thatcher’ Save Britain?

    Contest to replace David Cameron as Britain’s prime minister started in earnest Thursday with top candidates outlining strategy to deal with Brexit fallout

    US Finds Progress Slow Against Human Trafficking in Africa

    Africa continues to be a major source and destination for human trafficking of all kinds -- from forced labor to sexual slavery, says State Department report

    By the Numbers

    Featured Videos

    Your JavaScript is turned off or you have an old version of Adobe's Flash Player. Get the latest Flash player.
    Clinton Leads Trump, But Many Voters Don't Like Eitheri
    X
    Jim Malone
    June 29, 2016 6:16 PM
    In the U.S. presidential race, most recent polls show Democrat Hillary Clinton with a steady lead over Republican Donald Trump as both presumptive party nominees prepare for their party conventions next month. Trump’s disapproval ratings have risen in some recent surveys, but Clinton also suffers from high negative ratings, suggesting both candidates have a lot of work to do to improve their images before the November election. VOA National correspondent Jim Malone has more from Washington.
    Video

    Video Clinton Leads Trump, But Many Voters Don't Like Either

    In the U.S. presidential race, most recent polls show Democrat Hillary Clinton with a steady lead over Republican Donald Trump as both presumptive party nominees prepare for their party conventions next month. Trump’s disapproval ratings have risen in some recent surveys, but Clinton also suffers from high negative ratings, suggesting both candidates have a lot of work to do to improve their images before the November election. VOA National correspondent Jim Malone has more from Washington.
    Video

    Video Slow Rebuilding Amid Boko Haram Destruction in Nigeria’s Northeast

    Military operations have chased Boko Haram out of towns and cities in Nigeria’s northeast since early last year. But it is only recently that people have begun returning to their homes in Adamawa state, near the border with Cameroon, to try to rebuild their lives. For VOA, Chris Stein traveled to the area and has this report.
    Video

    Video New US Ambassador to Somalia Faces Heavy Challenges

    The new U.S. envoy to Somalia, who was sworn into office Monday, will be the first American ambassador to that nation in 25 years. He will take up his post as Somalia faces a number of crucial issues, including insecurity, an upcoming election, and the potential closure of the Dadaab refugee camp in Kenya. VOA’s Jill Craig asked Somalis living in Kenya’s capital city Nairobi how they feel about the U.S. finally installing a new ambassador.
    Video

    Video At National Zoo, Captivating Animal Sculptures Illustrate Tragedy of Ocean Pollution

    The National Zoo in Washington, D.C., is home to about 1,800 animals, representing 300 species. But throughout the summer, visitors can also see other kinds of creatures there. They are larger-than-life animal sculptures that speak volumes about a global issue — the massive plastic pollution in our oceans. VOA's June Soh takes us to the zoo's special exhibit, called Washed Ashore: Art to Save the Sea.
    Video

    Video Baghdad Bikers Defy War with a Roar

    Baghdad is a city of contradictions. War is a constant. Explosions and kidnappings are part of daily life. But the Iraqi capital remains a thriving city, even if a little beat up. VOA's Sharon Behn reports on how some in Baghdad are defying the stereotype of a nation at war by pursuing a lifestyle known for its iconic symbols of rebellion: motorbikes, leather jackets and roaring engines.
    Video

    Video Melting Pot of Immigrants Working to Restore US Capitol Dome

    The American Iron Works company is one of the firms working to renovate the iconic U.S. Capitol Dome. The company employs immigrants of many different cultural and national backgrounds. VOA’s Arman Tarjimanyan has more.
    Video

    Video Testing Bamboo as Building Material

    For thousands of years various species of bamboo - one of the world's most versatile plants - have been used for diverse purposes ranging from food and medicine to textiles and construction. But its use on a large scale is hampered because it's not manufactured to specific standards but grown in the ground. A University of Pittsburgh professor is on track to changing that. VOA’s George Putic reports.
    Video

    Video Orphanage in Iraqi City Houses Kids Who Lost their Parents to Attacks by IS

    An orphanage in Iraqi Kurdistan has become home to scores of Yazidi children who lost their parents after Islamic State militants took over Sinjar in Iraq’s Nineveh Province in 2014. Iraqi Kurdish forces backed by the U.S. airstrikes have since recaptured Sinjar but the need for the care provided by the orphanage continues. VOA’s Kawa Omar filed this report narrated by Rob Raffaele.
    Video

    Video Re-Opening Old Wounds in a Bullet-Riddled Cultural Landmark

    A cultural landmark before Lebanon’s civil war transformed it into a nest of snipers, Beirut’s ‘Yellow House’ is once again set to play a crucial role in the city.  Built in a neo-Ottoman style in the 1920s, in September it is set to be re-opened as a ‘memory museum’ - its bullet-riddled walls and bunkered positions overlooking the city’s notorious ‘Green Line’ maintained for posterity. John Owens reports from Beirut.
    Video

    Video Brexit Resounds in US Presidential Contest

    Britain’s decision to leave the European Union is resounding in America’s presidential race. As VOA’s Michael Bowman reports, Republican presumptive nominee Donald Trump sees Britain’s move as an affirmation of his campaign’s core messages, while Democrat Hillary Clinton sees the episode as further evidence that Trump is unfit to be president.
    Video

    Video NASA Juno Spacecraft, Nearing Jupiter, to Shed Light on Gas Giant

    After a five-year journey, the spacecraft Juno is nearing its destination, the giant planet Jupiter, where it will enter orbit and start sending data back July 4th. As Mike O'Sullivan reports from Pasadena, California, the craft will pierce the veil of Jupiter's dense cloud cover to reveal its mysteries.
    Video

    Video Orlando Shooting Changes Debate on Gun Control

    It’s been nearly two weeks since the largest mass shooting ever in the United States. Despite public calls for tighter gun control laws, Congress is at an impasse. Democratic lawmakers resorted to a 1960s civil rights tactic to portray their frustration. VOA’s Carolyn Presutti explains how the Orlando, Florida shooting is changing the debate.

    Special Report

    Adrift The Invisible African Diaspora