He has. He talks about it at the start. If your body and brain in development does not receive enough nutrients, it does not fully develop. As a volunteer tea

He has. He talks about it at the start. If your body and brain in development does not receive enough nutrients, it does not fully develop. As a volunteer teacher I have seen African kids disconnect after just 2 hours of class because the food they ate was weak in nutrients. This usually happens with iodine. If the pregnant mother has not enough of it, the baby will develop with smaller IQ. The same happened in Africa in sport for a long time. It could not compete with the USA, even when most of them actually were genetically from Africa. In the US, they could develop fully.