There have been campaigns to supply Vitamin A tablets to communities but they've not been sustainable. As you can imagine, traversing the whole country trying to distribute Vitamin A capsules is a challenge."
Research has shown that just one capsule of vitamin A every six months could cut child mortality by 25%. But getting pills to millions of people in remote villages is not just difficult - it's also expensive.
With vitamin A supplements costing as much as $2.70 (£2.20) per dose, fighting this deficiency globally through supplements alone would cost almost $3bn (£2.4bn) per year, according to a report published on Science Direct.
Breeding crop varieties that naturally produce the necessary nutrients provides steady access at a much cheaper cost.