A healthy diet is more than just calories. Priya Shetty gets the figures on the cost of poor nutrition — and the scale of the challenge.

Developing countries urgently need nutritional interventions to safeguard vulnerable people during economic crises, writes Suresh Babu.

Understanding how carbon dioxide impacts food quality is vital to tackle malnutrition effectively, says agricultural researcher Lewis Ziska.

Micronutrients help fight disease — it's time to turn knowledge into action, say nutrition researchers Andrew Thorne-Lyman and Wafaie Fawzi.

We must focus on food safety as well as nutrition to feed the hungry — but there are many barriers to safe eating, writes the WHO's Jørgen Schlundt.