Nutrition and health in women, children, and adolescent girlsBMJ 2015; 351 doi: https://doi.org/10.1136/bmj.h4173 (Published 14 September 2015) Cite this as: BMJ 2015;351:h4173
- Francesco Branca, director1,
- Ellen Piwoz, senior program officer2,
- Werner Schultink, chief of nutrition3,
- Lucy Martinez Sullivan, executive director4
- 1Department of Nutrition for Health and Development, World Health Organization, Avenue Appia 20, 1211 Geneva 27, Switzerland
- 2Bill and Melinda Gates Foundation, USA
- 3Unicef, New York, USA
- 41000 Days, Washington, DC, USA
- Correspondence to: Francesco Branca
Every year the lives of around 50 million children are put at risk because they are dangerously thin from acute undernutrition, while the long term health of more than 40 million children is threatened because they are overweight. Two billion people suffer from vitamin and mineral deficiencies, but overweight and obesity are key contributors to the non-communicable diseases that account for almost two thirds (63%) of adult deaths globally. These different forms of malnutrition—undernutrition, overweight and obesity, and micronutrient deficiencies—now affect people across the same communities and harm people of all ages. (Unless otherwise cited, the figures given are WHO estimates.)
Improving nutrition therefore presents a key opportunity to improve health. As the UN secretary general launches his second Global Strategy for Women’s, Children’s and Adolescents’ Health in September 2015 a strengthened focus on nutrition is warranted, with special attention to the first 1000 days of life (from pregnancy to the child’s second birthday), pregnant and lactating women, women of reproductive age, and adolescent girls.
This paper highlights nutrition related priority actions to improve the health of women, children, and adolescent girls. It is based on existing policy guidance issued by the World Health Assembly in the form of resolutions or targets; guidelines from the World Health Organization; or the outcome documents of the Second International Conference on Nutrition (ICN2).
The vast majority of the recommended actions proposed in this paper were agreed by the 162 member states attending the ICN2 in Rome in November 2014.1 These recommendations were developed by the secretariats of the Food and Agriculture Organization of the United Nations and WHO on the basis of current evidence and were subject to extensive consultation. An information note on the ICN2 provides more background information on the recommended actions.2
Some additional recommendations, specific to women’s, children’s, or adolescents’ nutrition, are based on WHO guidance. Where such a recommendation does not exist, emerging evidence reviewed by the authors is cited.
Problems associated with poor nutrition
Good nutrition is fundamental for optimal health and growth. Through its effect on health and cognitive development it is also vital for academic performance and productivity, and therefore for healthy economies and socioeconomic development.
Health effects of malnutrition
The consequences of malnutrition could hardly be more serious: around 45% of child deaths in 2011 were due to malnutrition (including fetal growth restriction, suboptimal breast feeding, stunting, wasting, and deficiencies of vitamin A and zinc). In 2013 the growth of around 161 million children aged under 5 was stunted by chronic undernutrition, leading to hampered cognitive and physical development, poor health, and an increased risk of degenerative diseases.3 In the same year 51 million children were wasted (having low weight for height) because of acute undernutrition; severe wasting increases the risk of morbidity, particularly from infectious diseases such as diarrhoea, pneumonia, and measles, and is responsible for as many as two million deaths a year.4
Meanwhile, deficiencies of vitamin A and zinc cause many deaths (157 000 and 116 000 child deaths, respectively, in 2011),5 and iodine and iron deficiencies, along with stunting, contribute to children not achieving their full potential. Iron and calcium deficiencies increase the risks associated with pregnancy, particularly maternal mortality.5
At the same time overweight and obesity in children and adults have been increasing rapidly in all regions of the world, and half a billion adults were affected by obesity in 2010. Dietary risk factors, together with inadequate physical activity, were responsible for 10% of the global burden of disease and disability in 2010.6
Socioeconomic impact of malnutrition
Malnutrition contributes to an estimated 200 million children failing to attain their full development potential. Stunting is estimated to reduce a country’s gross domestic product by as much as 3%,7 and eliminating anaemia could increase adult productivity by 5-17%.8
Every $1 (£0.64; €0.91) invested in tackling undernutrition is estimated to yield around $18 in return—the median benefit:cost ratio from a study modelling the effect of preventing one third of stunting in children up to age 3 in 17 high burden countries. 9 More specifically, a recent study of the benefit:cost ratio of a package of nutrition interventions aimed at averting stunting in 15 countries found that benefits outweighed costs by as much as 42:1, depending on the existing economic and nutritional situation.10
Box : What do we mean by malnutrition?
Malnutrition: nutritional disorders in all of their forms (including imbalances in energy intake, macronutrient and micronutrient deficiencies, and unhealthy dietary patterns). Conventionally, the emphasis has been on inadequacy, but malnutrition also applies to excess and imbalanced intakes.
Overweight: a situation caused by an excessive, unbalanced intake of energy or nutritional substances (and often combined with a sedentary lifestyle).
Stunting: low height for age (more than two standard deviations below the WHO child growth standard median for children under 5). Stunting is defined by WHO as a public health problem when 20% or more of the population are affected.
Undernutrition: a situation in which the body’s energy and nutrient requirements are not met because of under-consumption or the impaired absorption and use of nutrients. Undernutrition commonly refers to a deficit in energy intake, but it can also refer to deficiencies of macronutrients and micronutrients, and it can be either acute or chronic.
Wasting: low weight for height (more than two standard deviations below the WHO child growth standard median for children under 5). Wasting becomes a public health problem when 5% or more of the population are affected.
Box : Nutrition in recent global initiatives and commitments
Global Strategy for Women’s and Children’s Health: the UN secretary general’s strategy, put into action by the global Every Woman Every Child movement, clearly set out the need to tackle nutrition in young children.11
Global nutrition targets for 2025: countries are working towards six global targets agreed at the 65th World Health Assembly in 2012 (table 1)⇓.
Global Action Plan for the Prevention and Control of Non-communicable Diseases 2013-20: includes targets to reduce salt intake by a third and to halt the increase in obesity among adolescents and adults.
Second International Conference on Nutrition: in November 2014 the world’s leaders committed to eradicating hunger and preventing all forms of malnutrition worldwide.12
What progress has been made in tackling malnutrition?
Better understanding of the challenges and solutions
The root causes of malnutrition and the factors leading to it are complex and multidimensional. Poverty, underdevelopment, and low socioeconomic status are major contributors, along with other social determinants. Current food systems struggle to provide adequate, safe, and diversified foods. The reasons include constraints on access to land, water, and other resources—often aggravated by environmental damage—along with unsustainable production and consumption patterns, food losses and waste, and unequal distribution and access. Malnutrition is often aggravated by poor feeding and care practices for infants and young children, as well as poor sanitation and hygiene. A lack of access to education, quality health systems, and safe drinking water can also have a negative effect, along with infectious disease and the ingestion of harmful contaminants.
In recent years progress has been made in developing knowledge and understanding of the magnitude and scope of nutritional challenges, the increasing contribution of non-communicable diseases, and the complex web of factors that can influence nutrition.
A greater understanding has developed regarding the importance of nutrition at different stages of the life course and the effect of poor nutrition across generations (fig 1⇓). An intergenerational cycle of malnutrition exists whereby a woman who has anaemia, for example, is likely to have a baby with a reduced birth weight. Low birthweight babies are more likely to be wasted or stunted and to have a higher risk of morbidity and mortality and of developing non-communicable diseases later in life. Conversely, if the mother is obese when she starts her pregnancy she is also at increased risk of complications during pregnancy or delivery, which could result in premature delivery—and, therefore, a low birth weight for her baby. Alternatively, if she carries the baby to full term, her baby is more likely to have a higher birth weight and a higher risk of child and adolescent obesity.
The past two decades have also seen a major shift in understanding of the policy responses required to improve nutrition and promote healthy diets. It is now clear that an enabling environment plays a key role and that policies that change aspects of the food environment are required (such as what foods are available, what levels of fat, sugar, or salt they contain, or how much they cost), as well as nutrition education and information.
Similarly, there is now much greater awareness that effective responses need to come from beyond the health sector and that this must involve other sectors, such as those related to water and sanitation, education, trade, and social protection. Crucially, a radical transformation is needed so that food systems can ensure that everyone has access to a sustainable, balanced, and healthy diet.
Progress towards global nutrition targets
Significant progress has been made in reducing hunger and undernutrition in the past two decades: the percentage of people in developing regions experiencing hunger fell from 24% in 1990-92 to 14% in 2011-13.14 The 2014 Global Nutrition Report showed, however, that the world is not on track to meet any of the six World Health Assembly nutrition targets (table 1⇓).
What are the priorities for improving nutrition?
Improving women’s, children’s, and adolescents’ nutrition requires a range of policies, programmes, and interventions at different stages of life. And, since we know that malnourished women give birth to malnourished children, it is possible to take action to improve nutrition across generations (fig 2⇓). Specific recommendations and actions to help put them into practice are shown in tables 2 to 4.⇓ ⇓ ⇓
Actions to improve adolescent girls’ nutrition
Adolescent girls should be at the heart of a life course approach—a young adolescent girl is still a child, but often she will soon become a mother. Adolescent pregnancy is associated with higher risk of maternal mortality and morbidity, stillbirths, neonatal deaths, preterm births, and low birth weight. In addition to actions to prevent adolescent pregnancy and encourage pregnancy spacing, efforts are required to ensure that pregnant and lactating teenage mothers are adequately nourished.
Actions to improve child nutrition
The first 1000 days of life (from pregnancy to the child’s second birthday) present an important window of opportunity to improve child nutrition. The key pillar of any strategy to improve this—in addition to good maternal nutrition and health—is optimal feeding and care for infants and young children. Exclusive breast feeding (defined as the practice of giving an infant only breast milk for the first six months of life, with no other food or water), in particular, has the single largest potential effect on child mortality of any preventive intervention. Timely and adequate complementary feeding, with particular attention to vitamin and mineral content and the nutrient density of foods, is urgently needed.
Actions to improve women’s nutrition
The health and nutrition statuses of women and children are intimately linked. Improving the health of women and children, therefore, begins with ensuring the health and nutritional status of women throughout all stages of life, and it continues with women being providers for their children and families. Thus, a key priority is female empowerment and women’s full and equal access to, and control over, social protection and resources such as income, land, water, and technology. Direct multisectoral actions to tackle critical women’s nutritional challenges, such as iron deficiency anaemia, need to be rolled out on a larger scale to achieve universal coverage.
Improving nutrition across the life course
These targeted recommendations must be supported by a raft of nutrition interventions throughout the life course (see the ICN2 Framework for Action for the full range of recommended actions). Policies are needed, for example, to transform food systems and strengthen health systems. Universal access to functioning and resilient health systems and the scaled-up delivery of interventions can improve nutrition. Governments and international organisations also have a role in developing clear guidelines on healthy diets.
What needs to happen now?
If we want to improve the health of women, children, and adolescents, action to invest in nutrition is needed now. We know what needs to be done—as explained by the recommended actions in tables 2 to 4⇑ ⇑ ⇑—and the clear global commitments to action.
We now need to implement these commitments and ensure the resources to do so (the Addis Ababa Action Agenda refers to the need to scale up efforts to end hunger and malnutrition at paragraph 13 and the need to strengthen national health systems at paragraph 77).16 In a nutshell, actions are needed to improve the quality of diets; protect, promote, and support breast feeding; ensure that everyone has access to essential nutrition actions; provide adequate water and sanitation; and provide information and education.
To achieve these aims governments and society must join forces and make nutrition a priority. Governments, health services, the food and agriculture industries, schools and universities, and community leaders—along with many others—must work together in a coordinated and coherent way.
The potential human, societal, and economic gains from turning these commitments into action are substantial, and the costs of inaction are high. The time is right to tackle malnutrition in all forms at all ages and to break its intergenerational cycle.
Investment in nutrition is crucial to future efforts to improve the health of women, children, and adolescents; the potential human, societal, and economic gains from such investment are substantial.
Clear global commitments to action are in place, backed by targets to measure progress. All contributors, across government and society, must come together to turn these commitments into action.
Specific actions are needed to improve the quality of the diet; to protect, promote, and support breast feeding; to ensure that everyone has access to essential nutrition actions; to provide adequate water and sanitation; and to provide information and education.
Cite this as: BMJ 2015;351:h4173
The authors thank Karen McColl, Lina Mahy, Rebecca Olson, and Shelly Sundberg for their contributions to this paper.
Competing interests: We have read and understood BMJ’s policy on declaration of interests and have no relevant interests to declare.
The authors alone are responsible for the views expressed in this article, which does not necessarily represent the views, decisions, or policies of WHO or the institutions with which the authors are affiliated.
Provenance and peer review: Not commissioned; externally peer reviewed.
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