How to get enough nutrition into the diets of some of the world's poorest people is a persistent problem in the developing world.
In Bangladesh, where half the population lives below the poverty line, a UN-funded programme in the country's North West has been working with farmers to breed nutrient-dense small fish for communities.
The country has one of the world's highest rates of malnutrition, while more than 40 per cent of children suffer from stunted growth.
"In Europe, children get most of their calcium from drinking milk or eating cheese," said Nigel Brett of the International Fund for Agricultural Development.
"But in rural Bangladesh milk is not that widely available and with a predominantly rice-based diet, which is very low in micro-nutrients, we need to find other options."
To tackle the lack of essential minerals in people's diets, the United Nations worked with 2000 households by funding the World Fish programme
Now, a group of 70 farmers is using new skills in the production and preparation of small fish, to tackle malnutrition's blight
The fish are rich in iron, zinc, vitamin A and calcium - perfect for pregnant women and the growing bodies of small children.
The programme also makes the most of what Bangladesh has in abundance: four million household ponds.
"The children of the community do not suffer from malnutrition any more," said Latifa Begum, one of the lead farmers and a nutrition trainer in the town of Mondolpara.
"They’re stronger and generally healthier."
The production of small fish in ponds in this region is now up by more than three times, and impressed neighbouring communities are trying it for themselves.
Bangladesh has many entrenched, long-term social problems, and a small scale programme like this makes a mere dent.
But for this community, the outside help has made life that little bit easier.
This story was produced with footage shot by the United Nations' International Fund for Agricultural Development.
