Store bought multivitamins aren't even guaranteed to rule it out. For a myriad of different reasons, you can still have deficiencies even if you take a multivitamin. So, maybe it's worth a try, but if it doesn't work, that doesn't mean there couldn't still be a deficiency.
Have you tried buying some multivitamins at the store just to rule out that THAT was the issue?
Store bought multivitamins aren't even guaranteed to rule it out. For a myriad of different reasons, you can still have deficiencies even if you take a multivitamin. So, maybe it's worth a try, but if it doesn't work, that doesn't mean there couldn't still be a deficiency.
Recently did some research on what the treatment would be for a particular deficiency.
Found that general-purpose multivitamins provide about 0.5% of the therapeutic amount.
So yeah, there can be a massive difference between the little bit of help a multivitamin can give vs. what you really need for a specific condition.