Grown by more than 44% of Ugandan farmers, sweet potatoes are a staple food all over the country but the white variety that is commonly consumed does not provide as much Vitamin A.
Through the process of biofortification, scientists combined local varieties of sweet potato with others from around the world to build in more vitamin A, producing a vitamin-rich breed tailored to suit local tastes and local climate.
Dr Mwanga has been developing this agriculture-based strategy for fighting micronutrient deficiency in Uganda for several years.
He says his work presents a viable solution to the problem not just for Uganda, but also for the continent.