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Unlocking the Secrets of Longevity Genes

A handful of genes that control the body's defenses during hard times can also dramatically improve health and prolong life in diverse organisms. Understanding how they work may reveal the keys to extending human life span while banishing diseases of old age

By David A. Sinclair and Lenny Guarente

The Serious Search for an Antiaging Pill

In government laboratories and elsewhere, scientists are seeking a drug able to prolong life and youthful vigor. Studies of calorie restriction are showing the way

By Donald K. Ingram, George S. Roth and Mark A. Lane

The Risks on the Table

More than half the foods in U.S. supermarkets contain genetically modified ingredients. Have they been proved safe for human consumption?

By Karen Hopkin

Seeds of Concern

Are genetically modified crops an environmental dream come true or a disaster in the making? Scientists are looking for answers

By Kathryn Brown

Rebuilding the Food Pyramid

Dietary guides introduced in 1992 and 2005 have led people astray. Some fats are healthy for the heart, and many carbohydrates clearly are not

By Meir J. Stampfer and Walter C. Willett

Future Feast

Even the meat and potatoes are being reinvented: the meat could come from a test tube, and the potatoes could ward off cholera

By Jim Kling

Dying to Be Thin

Eating disorders cripple--literally--millions of young women, in large part because treatments are not always effective or accessible

By Kristin Leutwyler

Drink to Your Health?

Three decades of research shows that drinking small to moderate amounts of alcohol has cardiovascular benefits. A thorny issue for physicians is whether to recommend drinking to some patients

By Arthur L. Klatsky and Tina West

Calorie Restriction and Aging

Eating less--while maintaining adequate nutrition--is a recipe for longer life in many animals. Might it help humans as well?

By Richard Weindruch

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