If you have a concern, ask your doctor to order blood work to check your levels. I had heard the same thing, so asked my PCP to check. I did not have a deficiency, and was in the high-normal level. Just because you're on a PPI doesn't necessarily make you vitamin deficient. It's easy to check, so if you're worried, ask to be tested.
Nissen Fundoplication 2/09
"Whatever you fight, you strengthen, and what you resist, persists.”
“Worry pretends to be necessary but serves no useful purpose”
“Accept - then act. Whatever the present moment contains, accept it as if you had chosen it. Always work with it, not against it.”