Zip fizz while pregnant?

My doctor said it was okay to have 200mg a day of caffeine. Before getting pregnant I used to drink Zip Fizz to increase B12 intake.

Has anyone in this group taken ZipFizz while pregnant and/or asked a doctor if it is safe? My PA had said it should be safe, but isn’t familiar with it.

ETA: she said any excess of B12 just gets peed out so that’s why it isn’t concerning?