I use RO water, and build the profile I want using Palmer's spreadsheet. From the Daniels quote "This includes things like calcium, magnesium, sulfur and chloride.". Ca comes from the gypsum and CaCl2. Mg from Epsom salts. Sulfur from the gypsum. Cl from the CaCl2.
One other thing the yeast will utilise is zinc. Half a diet supplement tab is about right for a 10 gallon batch. FAN and vitamins comes from the grain, as Kai says.
BYO had an article on yeast nutrition this past summer.