Besides B-12, I find I need a couple of other supplements as well: calcium, which includes vitamin D, and a mixture of digestive enzymes under the name, Peaceful Digestion by Veg Life. (I was going to list the ingredients, but my Aunt Helen borrowed my magnifying lens, and i can't read the fine print on the bottle. It's good though and helps me assimilate the nourishment.) We're all different, but the enzymes seem to be important.
I've been vegan for ten-years and still go through periods of listlessness and what seems like physical apathy, but more and more I'm realizing these feelings are about old memories and have nothing to do with my actual physical needs. Each time it happens, once it passes, I find myself healthier, physically stronger than I was. Hang in there!
"There is more wisdom in the song of a bird, than in the speech of a philosopher...." -Oahspe
"The thing is, you cannot judge a race. Any man who judges by the group is a pea-wit. You take men one at a time." -Buster Kilrain, The Killer Angels -Michael Shaara
"Anyone who doesn't believe in miracles isn't a realist." -Billy Wilder