Under California’s Proposition 65 law, products containing chemicals that may cause cancer, birth defects or reproductive toxicity must carry a warning label at their point of sale. Among such products: pricy balsamic and red-wine vinegars that contain lead. At least some California groceries apparently have taken a conservative approach and post labels suggesting all such vinegars are dangerously tainted. Although they aren't.

Chemical analyses show some botanical extracts contain little of the plant material they were supposed to possess.

More kids are developing diabetes, and obesity is a major reason why.

Avocados may hold a key to longer, better health.

Nutrition scientists think apples might replace some drugs as a way of limiting heart disease.

Sometimes data don't confirm what we expected.