I didn't say that lithium was an essential chemical needed by the human body but there are other metal elements that the human body needs to stay healthy.
Werner von Braun was the German genius who developed the missile and agreed to work with America after the War instead of being taken to court for War crimes. His work made the Apollo missions a reality. And I highly doubt that he consulted with aliens regarding missile technology. I certainly never heard that in Engineering school or the USAF.