Very useful information on ways to boost the immune system to resist and prevent disease, incuding allergies, arthritis, fibromyalagia, chronic fatigue syndrome, cancer, and much more! Although the book was written in 1999, there are many valuable facts on stress management, exercise, dietary supplements, and of course, diet, all science based. For instance, did you know that, "Our immune system function is severely hampered by sugar consumption"(p. 73)? Studies are referenced that confirms sugars' ability to drastically reduce the ability of our immune cells to engulf bacteria. Since sugar consumption is far greater than must people suspect, we should become aware of what we're eating and drastically reduce our intake of sugars if we want a strong immune system. (Fruit juices, sources of quickly-absorbed sugars, should also be drastically reduced or eliminated.) Many other practical pointers are included in this easy-to-read book