In this Users Guide, fitness professional and nutrition author RoseMarie Gionta Alfieri describes the most important supplements for improving mood, reducing irritability, and preventing depression. Among these supplements are the B-complex vitamins, GABA, and St. Johns wort. These and other nutrients have been shown scientifically to help people deal effectively with stress.

The latest research shows that it is possible to slow down the aging process and reduce the risk of age-related degenerative diseases. In this User's Guide, two leading health writers describe the scientific research and the steps you can take to improve energy levels, sharpen the mind, and turn back the biological clock.