Quote Originally Posted by christopher leigh View Post
Phone the surgery and ask for a print out of the results. This will show what they tested and didn't test for. On the vitamin front I would take something with a full complx of vitamins and minerals rather than one with just a few things in it.

The only other things I can think of that are causing your lack of performance are not enough sleep and being on some dodgy diet, like atkins, that deprives you of carbohydrate.
No dodgy diets I'll give the surgery a ring.