Enhancement is already big business at places like the Palm Springs Life Extension Institute, which offers hormone treatments as well as exercise and diet instruction, and at Nashville's Institute for Aesthetic and Reconstructive Surgery, which specializes in reshaping human faces and bodies. But as the enhancement industries expand, so do the worries about safety and equity. Testosterone seems to make older men more energetic and muscular, but may increase the risk of prostate cancer. Prozac, a wonder drug for some has been accused of making people suicidal and violent. Most safety issues will probably be resolved over time, but as these worries ebb, concern over equity issues will probably increase.
Some scientific leaders believe it's time to begin.
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