Ok then lets tell it like it is, they are not vitamins.
If you are going to sell an animals it is
suggested by some to give the horse equipose
for the coat even though the horse is fine physically.

The hormone, which is basically a dervatitive of testoterone
(other brands have slightly diff. chemical structure so they
can be marketed under another name) are used on horses
that dont need them.

I attempted very poorly apparently (fat soluble) to explain
one reason why the levels are hard to measure.

Sorry for the interruption.