Depends on what you mean by dietary supplements. If you mean vitamins, you probably should at least take a MVI, potassium and calcium. If you're talking about meal replacements, shakes are usually ok if they're LC (I use EASE carb control and love them), but you probably should stay away from the bars....at least until after induction. You might react to them by stalling or gaining.

As for other nutrition supplements, I don't know much about them, but personally, I think if you're eating natural, fresh foods you probably dont' need them unless your doc suggests them.

Good luck!