Is it safe to take vitamin b2 while pregnant or breastfeeding?

Yes: Vitamin b2 is an important vitamin and an adult multivitamin will have an adequate dose. You really don't need to take an extra supplement. In addition and more importantly you will get more vitamin b2 in your system if you eat a healthy, well balanced diet of unprocessed foods. You should eat lots of greens and fish.

Yes: You really do not need to supplement your adult multivitamin with additional vitamin supplements. You should eat foods rich in vitamin b2 like fish and leafy greens.