
The International Agency for Research on Cancer (IARC), the global body that keeps tabs on cancer risk, has studied nearly 1,000 “agents” to see whether they might be carcinogens. These agents run the gamut from very specific substances (e.g., plutonium) to broad categories of stuff (red meat) to broad classes of activities (working night shifts). And of all the things the IARC has looked at, there is just one it is pretty sure doesn’t cause cancer.






















