Vitamin B12

I'm still trying to figure this one out by looking at the foods I eat and what is fortified with it. It's looking like I'm going to be buying a supplement because only my Rice milk is fortified with it.
B12 is the only vitamin that comes from animal products unless you take a supplement or buy foods that are fortified with it.
Without enough B12 you can become anemic and have nervous system failure. I remember in high school I became anemic after being a vegetarian for a few years but I doubt it was from a B12 deficiency since I was still consuming dairy. And another scary thing is that symptoms don't show up for a while, like years later.

The US recommended intake is 2.4 mcgs a day for ordinary adults rising to 2.8 mcgs for nursing mothers. Taking a B12 supplement containing 10 mcgs or more daily provides a similar absorbed amount to consuming 1 mcg on three occasions through the day. This may be the most economical method as a single high potency tablet can be consumed bit by bit. 2000 mcgs of B12 consumed once a week would also provide an adequate intake. Any B12 supplement tablet should be chewed or allowed to dissolve in the mouth to enhance absorption. Tablets should be kept in an opaque container. As with any supplement it is prudent not to take more than is required for maximum benefit, so intakes above 5000 mcg per week should be avoided despite lack of evidence for toxicity from higher amounts.

Source

I'm going to be looking for a tablet of 10mcg or more to take per day or a 2000 mcg tablet to take per week. I could've sworn I had some B vitamin supplement around here but I can't seem to find it. Oh well, off to the store I go :)