Is there any non-meat product that contains vitamin b12,....I also want to body build?

Hello. Why is it so hard to be vegetarian when i need protein and vitamin b12?
I dont want to sound like a traitor. But i ate meat today. Beef. Ive been trying to pull it off and it worked for at least 4 weeks. Ive eaten nothing but tofu,salads,beans,nuts, fruit. I saw a nutrientist about a day ago and she said my body was lacking it...........and leads to stress.

Oh yeah, i heard that anything that has soy has female estrogen...........and you start growing boobs...........IM A FREAKING

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