Originally Posted by Left Hand Percherons
ADM does not list the values on 21 vitamins and minerals as they consider it "proprietary information"
As a side note, I really hate when companies do this. If they're selling something as a vitamin/mineral supplement, they should be supplying the consumer with the information to make an informed decision, not forcing them to just "trust" that certain items are present and in sufficient quantity. I've seen enough supplements that DON'T provide enough of various nutrients that I can't simply go on trust.
I also hate to see supplements that are a large percentage salt. Salt is easy and cheap to make available separately and is the only mineral that studies have shown horses to self-regulate. If they need salt, they'll eat it.