 100 balding men were randomized to twice a day of minoxidil versus a rosemary lotion. It took six months, but eventually there was significant comparable improvements in hair counts in both groups. The rosemary lotion appeared to work as well as the drug. You can make it at home by mixing 10 drops of rosemary essential oil per fluid ounce to your favorite lotion, and then rubbing a quarter teaspoon onto your scalp twice a day. That much rosemary oil would cost about a penny a week.