Trace elements and minerals are fairly easy to get. Many of those same weeds you can feed to rabbits are chock-full of all kinds of good nutrition. A book on edible plants is recommended reading. Lichens and wild mushrooms (tread carefully!) are great sources of such nutrients.
For $10, you can buy a 50-pound bag of mineral supplement for livestock (chelated, highly bioavailble raw minerals -- pretty much mined from old lake/ocean beds and ground to a powder) that should last one person most of a lifetime. Much cheaper than a case of One A Day or Centrum tablets.
We use this stuff for our animals. On occasion, I will fill a couple of gel caps with the stuff and take some myself.
I take the glowing testimonials with a grain of salt (ha!), but the stuff seems to have a good reputation. Most ranchers tend to neglect their herds (likely more out of ignorance than malice), so I'm not surprised to hear that adding this supplement would yield huge improvement. Anecdotal accounts on various forums have been positive.
For all I know, this stuff could kill me in the long run, so don't come blaming me if it kills you should you try it. Consult your physician, dietitian, lawyer and all that standard disclaimer stuff.
