It's really a question of which ones have the most significant mortality and morbidity impacts and where we see a lot of deficiency in populations. We have worked very closely over the last 20 years with the World Health Organization to characterize populations in which there are public health problems related to vitamin and mineral deficiencies. We've come out with—you could say—a top five or a big five, of vitamin A, zinc, iron, iodine, and folic acid. However, they're not the only ones. We're seeing the importance growing and, frankly, we're learning more from the evidence every day about the different ways in which vitamin D interacts with the system or B-12 does, and these different things. It's not to rule out the other ones, but we very much go where the biggest impact on mortality and morbidity is seen.
On June 7th, 2016. See this statement in context.