If anyone is curious, as I was when I saw this: "If you ate a gram of uranium, the most likely result is that you would get heavy metal poisoning. You would have a fair chance of dying. It's not quite accurate to say that a gram of uranium is 20 billion calories. This figure only applies to the complete fission of a gram of uranium-235. Most uranium is uranium-238, which cannot sustain a fission reaction. One gram of U-235 is also well below its critical mass of 56 kilograms, so no nuclear chain reaction will occur. There is also no process in the human body that can start a nuclear reaction. Furthermore, the energy of nuclear fission is not in a form the body can use. Uranium is both radioactive and a heavy metal poison with an oral LD50 estimated at 1-5 grams depending on the form it is taken in. Simple uranium metal would react (chemically) with your stomach acid and you'd find yourself belching hydrogen. If enough the uranium dissolves and enters your system, it has a good chance killing you. If you survive, you'll likely be at an increased risk of stomach and intestinal cancer." Source: Some random guy on the internet.
See also: Radithor, the Radium Revigorator, and the Radium Girls for stories of early 20th century radiation quackery and gross negligence. Uranium definitely emits alpha radiation, which will definitely kill if it’s inside your body. Normally, it’s blocked by the skin and relatively harmless. But having it inside your body is another matter.
