Solid, reliable nutritional advice--with careful attention to the needs of persons over 40 as well as interesting asides. The question-and-answer format effectively covers food groups, daily requirements, and other standard information. The authors are also refreshingly open to the possibility that they don't know it all. Instead of pooh-poohing the concern that we take in unhealthy amounts of aluminim from pots and pans, for example, they mention recent research indicating that aluminum may be implicated in the mental disorders of older people, and suggest practical ways to limit exposure. Other pointers: caffeine, Natow and Heslin believe, plays a role in formation of breast cysts; tea with lemon in a styrofoam cup erodes the container and may chemically combine with it to form a carcinogen. Altogether--with sections on alcohol and drugs, indigestion and how to relieve it, the relationship between diet and cardiovascular health, and other diseases affected by diet (arthritis, gout, diabetes)--this is considerably more than a standard nutrition guide. Enlightening discussion for those concerned.