Story, first published: Astounding Science Fiction, July 1941
A humanitarian group of researchers on Mercury are seeking to find the cure for a sickness afflicting spacemen and accidentally stumble on an elixir of youth found in the sands of Mercury. The leader of the group conceals his discovery fearing that the news will not be a blessing, but will only cause economic problems, wars, and more greed.
Ewald, Robert J.: When the Fires Burn High and the Wind is from the North, p.31