Can vegans get all their nutrients?

[dharani0022]

The only reliable vegan sources of B12 are foods fortified with B12 (including some plant milks, some soy products and some breakfast cereals) and B12 supplements. ... OR Take one B12 supplement daily providing at least 10 micrograms. OR Take a weekly B12 supplement providing at least 2000 micrograms.

 http://www.derekblog.com/the-6-supplements-that-all-vegans/