The pharaohs of ancient Egypt used magnets to preserve youth and well-being, and so did the Romans (for eye diseases), Chinese (for swollen joints), and Japanese. Now, for the sake of our health, it's time to take a fresh look at an old therapy. Magnets can improve blood flow and digestion, relieve night cramps and other localized pain, help acupuncture work more effectively, enhance the success of both low- and high-tech remedies, and neutralize the imbalances in our systems caused by electrical appliances. Harness this invisible energy properly, choosing from the different types of magnet and knowing what effect each pole will have on the body: the north-seeking red (or yang) side will stimulate, while the other blue side will sedate or calm.