More women than men suffer from Alzheimer' s disease -- a disease that is most commonly contracted by elderly persons  This discrepancy has often been attributed to women' s longer life span, but this theory may be wrong  A recent study has shown that prescribing estrogen to women after menopause, when estrogen production in the body decreases, may prevent them from developing the disease
Men' s supply of testosterone may help safeguard them against Alzheimer' s disease because much of it is converted by the body to estrogen, and testosterone levels stay relatively stable into old age
Testosterone is necessary for preventing Alzheimer's disease in older men.