Here we have the great irony of modern nutrition: at a time when hundreds of millions of people do not have enough to eat, hundreds of millions more are eating too much and are overweight or obese.

BASICS OF DIET AND HEALTH The basic principles of good diets are so simple that I can summarize them in just ten words: eat less, move more, eat lots of fruits and vegetables. For additional clarification, a five-word modifier helps: go easy on junk foods.

The general public believes that if a health claim is on the label the government backs that up, ... This sells food products, no question.

Meat is produced under HACCP plans. Meat and poultry are required to be produced under standard food safety plans and they have been since the mid-'90s, and there are now fewer problems with meat than there used to be. That's on the USDA's side.

The pet food recall, which was after all just about pets, and treated as if it were an inconsequential matter, was an absolute forerunner of what's going on in China, where 50,000 infants have been sickened because of a contaminated infant formula. So these things are all closely related. You cannot separate the food supply for pets, farm animals, and people, and you cannot separate problems in one area of a country from problems in another area.

If you're sick, first you have to associate your sickness with a food. Then you have to report it to your doctor. Then the doctor reports it to some state authority. The state authority reports it to the federal authority. By the time all that happens, two weeks have gone by.

What we know about diets hasn't changed. It still makes sense to eat lots of fruits and vegetables, balance calories from other foods, and keep calories under control. That, however, does not make front-page news.