Life as various peoples of the world know it, is not sustainable; it is only a matter of time before people of some future curse us for having so ignorantly corrupted what we might have left them(*). The fact is that there are many scientists well capable of 'moving' on much of what's 'wrong' today, and it takes no more than the active collusion of 'belief-system-free' individuals to meet and advance 'an invasion of government and economics that is inevitable in any case'(*). -'Democracy is nothing more than an artifact of thus-far intellectual evolution' -ask any biologist or anthropologist.
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October 3, 2008 Science Magazine
The Peanut Butter Debate
A new type of ready-to-use food is changing the way severe malnutrition is treated. But questions remain about how far to push its introduction--and science has a hard time providing the answer
By Martin Enserink
SAE SABOUA, NIGER - On a scorching hot day in this dusty, dry corner of the Sahel, mothers carrying babies and small children line up outside a couple of big tents. Some of the infants look healthy but others are shockingly thin, their arms like
broomsticks. They're waiting to enter a "therapeutic feeding center" operated by the French section of Médecins Sans Frontières (MSF). Once inside, the children are measured and weighed and receive a quick health checkup. If they're found to be severely
malnourished, they immediately receive a silvery sachet containing a new type of food that might just save their lives.
CREDIT: M. ENSERINK/SCIENCE
Open and squeeze the sachet and out pour 92 grams of a brown paste that looks like dark peanut butter. It's called Plumpy'nut, and one serving has 500 calories and plenty of proteins, vitamins, and minerals. Aid organizations like MSF say the paste, a so-called ready-to-use therapeutic food (RUTF), has revolutionized care for malnourished children. Plumpy'nut has a long shelf life, it does not need to be mixed with water--a major risk with standard treatments based on milk powder--and it is simple for mothers to give to their children at home. Perhaps best of all, children love the sweet, sticky stuff.
But the nutrition world is divided on just how far the introduction of these products should go. MSF wants to move beyond treating severe malnutrition and introduce peanut butter-like pastes to prevent that condition, which occurs in some 20 million children in Africa and South Asia every year. In one district in Niger, MSF has started giving the product to as many as 80,000 children between 6 and 36 months, in what's called "blanket distribution." MSF likens the move to the large- scale introduction of antiretroviral drugs in Africa, which it helped pioneer.
But others ask: Where's the science to support such a plan? Few dispute the power of RUTFs in treating severely wasted children. But there's little evidence that such products work equally well in preventing malnutrition. And besides, skeptics say, adding them to the regular diet of millions of children is too complicated and too costly--MSF's program cost more than $55 per child in 2007--to keep up in the long run. "For prevention, we need other products," says André Briend, a nutrition expert at the World Health Organization (WHO) in Geneva, Switzerland, who helped invent Plumpy'nut while working as a French government researcher.
The issue has pitted those who want to see solid evidence before embarking on a major aid program against those--impatient with talk about P-values, cost-effectiveness, and sustainability--who want to act now. "Thousands of kids are dying," says Milton Tectonidis, a former MSF nutrition expert and a vocal advocate of a massive introduction of RUTFs. "We have enough data now. Do something!"
A new approach Part Sahara, part Sahel, Niger is one of the poorest countries in the world. More than 70% of the population is illiterate. Malnutrition is pervasive, especially during the so-called hunger gap--the 5 or 6 months before the annual harvest, when the previous year's supplies of sorghum and millet are running out. Protracted dry spells periodically lead to severe food crises, but even in good years, the essentially vegan diet doesn't always provide enough nutrition for fast-growing children younger than 3, says Susan Shepherd, a medical adviser at MSF in Geneva.
Until a few years ago, the standard treatment for severe malnutrition was F100, a milk powder fortified with dozens of vitamins and minerals. F100 was developed in the 1980s by veteran nutrition scientist Michael Golden, now a professor emeritus at the University of Aberdeen, U.K. It needs to be reconstituted with clean drinking water and consumed almost immediately. Left unrefrigerated for a few hours, it turns into a bacterial soup that can cause infectious diseases. That's why F100 is administered only in special nutrition "hospitals" where children often stay as long as 4 weeks with a caretaker, usually their mother.
Those are serious drawbacks. A mother who leaves home and work may put other children or the harvest at risk. Hospital capacities are limited, forcing governments and aid organizations to turn away patients. During a 2002 famine in Angola, MSF treated 8000 children in in-patient centers, Shepherd says, far short of what was needed. Crowded hospitals also help spread infectious diseases. Studies have shown that only between 25% and 45% of patients make a full recovery--and as many as one in five dies.
Golden and others started looking for alternatives to F100 in the 1990s. In 1997, Briend, then at the Institute of Research for Development in Paris, teamed up with Michel Lescanne, the director of Nutriset, a food company in Normandy. Lescanne had experimented with Mars-like bars that had almost the same composition as F100; the problem was that they melted easily. Briend found his inspiration in a jar of Nutella, a hazelnut spread that his children loved; the duo developed a paste consisting of roasted, ground peanuts combined with vegetable oil, milk powder, sugar, and a mix of minerals and vitamins.
Plumpy'nut, as they called it, is less than 2% water, which makes it a hostile environment for microbes. Suspended in a fatty environment, the vitamins and minerals are very stable. Plumpy'nut can last for up to 2 years without refrigeration and does not spoil even after the package is opened.
Mark Manary, a nutrition scientist at Washington University in St. Louis, Missouri, was the first to test the product in clinical trials, in Malawi. Two studies published in 2004 showed that it was "really a breath of fresh air," Manary says: Almost 80% of severely malnourished children recovered. And the home-based treatment regimen proved easy to organize on a large scale.
Experiences elsewhere were similar. Steve Collins, who leads an Irish relief organization called Valid International, saw high recovery rates in Ethiopia, Malawi, and Sudan. MSF was sold on Plumpy'nut after it was able to treat as many as 60,000 children during a severe food crisis in Niger in 2005, says Shepherd--a vast improvement from the Angolan experience. In June of 2007, four United Nations agencies, including WHO and UNICEF, issued a joint statement advocating home treatment with RUTFs for severely malnourished children who don't have other illnesses.
Figure 2 CREDIT: M. ENSERINK/SCIENCE; SOURCE: UNICEF
As a result, demand and production have exploded. Nutriset is the biggest producer by far, making more than 15,000 tons in 2008. Although some are dismayed by Nutriset's patents on Plumpy'nut (see sidebar, p. 38), other companies are entering the market as well. In Malawi, Manary set up a Nutriset franchise that churns out 500 tons of Plumpy'nut a year. UNICEF, the biggest RUTF buyer in the world, may purchase as many as 8000 tons in 2008 and expects global production to grow to at least 50,000 tons by 2011.
Given that success, many were surprised when a series of major papers on malnutrition published in The Lancet earlier this year offered only lukewarm support for RUTFs. In a vociferous statement, MSF accused the authors of "undermining the support for this lifesaving intervention," which led to a rift with the journal (Science, 1 February, p. 555). WHO's Briend was dismayed as well. But the authors of the series have since said that they were misunderstood and that they do in fact support the use of RUTFs to treat severe malnutrition.
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