Global food and nutrition issues (SACE Stage 2 Nutrition)

What this dot point is asking

You need to examine global nutrition issues, both undernutrition and over-nutrition, and explain the social and economic factors that drive them.

Undernutrition and hunger

Undernutrition occurs when people do not get enough energy or nutrients. It includes chronic hunger, stunting (impaired growth in children) and micronutrient deficiencies such as iron, vitamin A and iodine deficiency, sometimes called hidden hunger because it is not always visible.

Undernutrition harms growth, immunity, learning and productivity, and in children it can cause lifelong effects. It is most severe among the poorest people and in regions affected by crisis.

Why hunger exists

A key idea is that hunger is mostly a problem of access and distribution, not total food supply. The world produces enough food in aggregate, yet people go hungry because they cannot afford, reach or grow it. Major causes include:

• Poverty: people lack the money to buy enough nutritious food.
• Conflict and instability: war disrupts farming, markets and aid.
• Climate and environment: droughts, floods and crop failures cut local supply.
• Unequal distribution: food and wealth are spread unevenly between and within countries, and food is wasted at large scale.

Over-nutrition and the double burden

At the same time, over-nutrition is rising worldwide. The nutrition transition describes how, as incomes rise and processed foods spread, diets shift towards more energy, sugar, fat and salt and less activity, increasing obesity and diet-related disease.

The result is the double burden of malnutrition: undernutrition and over-nutrition existing together, sometimes in the same country, community or even household, where one person may be undernourished and another overweight.

Responses to global nutrition issues

Responses include food aid and emergency relief for crises, longer-term development that improves incomes, farming and infrastructure, fortification of staple foods with micronutrients, and education. The most durable solutions tackle the underlying causes such as poverty and inequality, rather than only treating symptoms, which links to food security and sustainability in Topic 4.

Why this matters

Global nutrition issues show that food choice and health are shaped by forces far beyond the individual. Examining both ends of malnutrition, and the social and economic causes, prepares you to evaluate complex issues in the examination rather than offering simple answers.

The nutrition transition in more detail

The nutrition transition is worth understanding closely because it explains how a country can move from undernutrition towards over-nutrition within a generation. As incomes rise and people move from rural areas to cities, traditional diets based on staple grains, legumes and home-grown vegetables are replaced by cheaper, mass-produced processed foods high in refined carbohydrate, fat, sugar and salt. At the same time, work and travel become less physically demanding, so energy expenditure falls. The combination of more energy in and less energy out shifts the population towards overweight and the diet-related diseases of Topic 2, even while pockets of undernutrition remain.

This is why the double burden can appear in the same household: a grandparent who grew up with food scarcity may show stunting, while a grandchild raised on processed foods becomes overweight. Recognising the transition helps you explain why obesity and hunger are not opposites but two faces of the same broken food system, and why responses must improve both the affordability of nutritious food and the marketing environment, not just deliver food aid.

In short, global nutrition issues span undernutrition and over-nutrition occurring together as a double burden, driven mainly by poverty, conflict, climate and unequal distribution rather than a simple global food shortage.