Rome, Italy
October, 2003
Most people's diets still fall short of the mark
Some of the
world’s most widespread and debilitating nutritional disorders,
including birth defects, mental and physical retardation,
weakened immune systems, blindness, and even death, are caused
by diets lacking in vitamins and minerals (commonly referred to
as “micronutrients”). Low fruit and vegetable intake is a major
contributing factor to such micronutrient deficiencies.
Encouraging people to eat more fruits and vegetables is
therefore often at the top of nutrition educators’ to-do list.
Still, most populations are not consuming nearly enough,
according to the FAO/WHO Expert Report on Diet, Nutrition and
the Prevention of Chronic Diseases, released earlier this year.
While research
shows nine or ten servings of fruits and vegetables a day is
optimal, dietary guidelines tend to recommend a minimum of five
servings a day. [See related article, “What
is a serving?”] Yet studies show that most
populations are consistently not reaching even half this goal.
This is particularly troubling given the surge of new science
suggesting that fruits and vegetables can not only help prevent
nutrient deficiency disorders, but also reduce the risk of
cardiovascular diseases — another leading cause of morbidity and
mortality around the globe — and many cancers.
The rise of such non-communicable diseases in both wealthy
nations and poorer countries is partly due to declining physical
activity and excessive food energy intake. But WHO attributes
approximately 3 million deaths a year from such diseases to
inadequate fruit and vegetable intake — a risk factor almost as
deadly as tobacco use or unsafe sex.
“Increasing fruit and vegetable consumption is a major public
health challenge at the moment,” says Kraisid Tontisirin,
Director of FAO’s Food and
Nutrition Division.
There are various reasons why different populations tend to shy
away from fruits and vegetables — cost, convenience, taste and
stigma, to name a few. But as science increasingly supports the
need for people to consume more produce, national health
agencies, industry representatives and international
organizations, including FAO, are working together to address
these obstacles and discuss ways to boost fruit and vegetable
consumption around the globe.
Why are fruits and vegetables so indispensable?
For starters, they are full of vitamins and minerals, which
serve an array of important functions in the body: Vitamin A,
for instance, maintains eye health and boosts the body’s
immunity to infectious diseases; potassium promotes proper nerve
and muscle functioning; and B-vitamins are necessary for
converting food into energy. (Folate, one of the most common
B-vitamins found in produce, can also significantly reduce the
risk of neural tube birth defects in newborns and contribute to
the prevention of heart disease.)
Other micronutrients in fruits and vegetables, such as vitamin C
and vitamin E, serve as powerful antioxidants that can protect
cells from cancer-causing agents; vitamin C, in particular, can
increase the body’s absorption of calcium — an essential mineral
for strong bones and teeth — and iron from other foods. (Low
iron levels can lead to anaemia, one of the most severe
nutrition-related disorders, affecting about 2 billion people
worldwide.)
Many fruits and vegetables are also very high in dietary fibre,
which can help move potentially harmful substances through the
intestinal tract and lower blood cholesterol levels.
Much of fruits and vegetables’ potency is believed to also come
from substances known as “phytochemicals”. These unique
compounds are naturally produced by plants to protect themselves
against viruses, bacteria and fungi.
Over the last decade, scientists have begun to isolate hundreds
of these compounds and discover their wide-ranging health
benefits. But the exact mechanisms by which phytochemicals
promote health is still unclear. Scientists suspect it may be
due to their individual effects and their interaction with one
another, both within the same food and with phytochemicals found
in other fruits and vegetables, as well as whole grains, nuts
and legumes. Nutrients from other types of foods may also be an
important piece of the puzzle, since some vitamins and minerals
— and certain phytochemicals — are known to depend upon other
nutrients for their absorption and use.
“The best advice is to eat a wide variety of foods,” says
William D. Clay, Chief of FAO’s Nutrition Programmes Service.
This is one of the main messages in FAO’s “Get the best from
your food” campaign, a public information initiative aimed at
promoting appropriate diets and healthy lifestyles. “Eating an
abundance of fruits and vegetables within the context of a
diverse diet will help ensure you are meeting your nutritional
needs,” says Clay. [See related article, “Colour
is the key.”]
A challenge — and an opportunity — for agriculture
As difficult as it may be to get people to heed a simple message
like “Eat more fruits and vegetables”, the real challenge may
lay before the world’s food supply and distribution systems. FAO
is playing its part to make sure agriculture, particularly in
the developing world, can help meet the demand for healthy
foods.
“One of the main objectives is to make sure the safety and
health of foods is not compromised by increasing production
levels,” says Alison Hodder, an agricultural officer in FAO’s
Plant Production and Protection Division.
FAO encourages farmers to follow good agricultural practices,
and is working with different partners to develop a general
framework for food production systems that are both economically
and environmentally sustainable.
Since the harvest period for many fruits and vegetables can be
limited, FAO also provides information on the best methods for
preserving produce (for example, drying, chemical processing and
heat treatments) while retaining the maximum amount of
nutrients.
Another goal of the Organization is to improve people's access
to fruits and vegetables. In rural areas, FAO strives to
integrate gardening messages with nutrition information,
encouraging local communities to grow and consume a variety of
crops. In urban areas, FAO has launched the “Food for the
cities” initiative, a programme designed to link production with
transportation, storage and marketing strategies, and address
such critical issues as urban poverty and food costs.
As public awareness campaigns about the benefits of fruits and
vegetables continue to develop, producers may have a unique
occasion to increase their production and enter new markets.
“The key is to
utilize techniques like crop programming, which help growers
schedule fruit and vegetable production throughout the year,”
says Hodder. “Agriculture can expand to meet consumers’
increasing needs as long as growers can learn to anticipate
them.” |