We eat a very healthy, well-balanced diet. I have an egg almost every morning (as recommended by a nutritionist because apparently my body needs high protein first thing in the morning.) Yet I continue to have problems with low B12 levels.

When I began experiencing severe fatigue in 2002, blood tests showed elevated white blood count and "dangerously low" B12. We treated the B12 with supplements, (and never did figure out the WBC problem). I noticed the difference within days - and to this day, can tell when my B12 is too low. One of the things I HAVE to eat at least once a week to stave off the debilitating level of fatigue is red meat. While I can and do get B12 through other sources, my body seems to process it best when it comes from red meat.