Your ideas are dangerous!!! Your walking 2000 miles on only a few nutty bars is bogus as I now know. I tried a similar experiment. I am sad to say that you were one of my influences. A few weeks ago, I was in a mercado mart on the edge of the bush in South America. the purpose of my visit to the mercado mart was to buy enough supplies for a solo 100 km trek with a 30 kilo backpack (none of it food) through mountainous jungle and then make it to the beach where I had arranged to meet a boat at the mouth of a small river. . All of the food at the store was nasty, and I got sick thinking about having to eat any of that crap they sold there. Then I got to thinking about your incredible story of hiking across the country and back on a few nutty bars and I think you said a peanut butter and jelly sandwich or something. Well if that Homo in La Jolla can do it, I sure can! I ended up with some flat bread-like stuff -I think they might have been tortillas which really suck cold-and 2 cans of tuna. I finished my food on the first day, except for some mangoes and coconuts I found and coca leaves I kept chewing. I was so weak by the 3rd day that I could barely do a pushup. Note that I bench press 350 - 400 pounds max when I'm feeling well . By the time I got to the beach, I had lost so much weight that my pants wouldn't stay up and I had punched new holes in my belt. When the crew on the boat saw how famished I looked, they immediately fed me. I didn't even need to ask. Thanks to you, I nearly starved to death.