This randomized placebo-controlled biofortified maize efficacy trial in Zambia demonstrated that ‘orange’ vitamin A maize increases vitamin A storage in the body. This maize has been conventionally bred (non-GMO) to have higher levels of beta-carotene, a naturally occurring plant pigment that the body then converts into vitamin A.
Gannon, B., Kaliwile, C., Arscott, S.A., Schmaelzle, S. Chileshe, J., et al. The American Journal of Clinical Nutrition (October 2014), e-pub ahead of print.