# In clinical studies of mostly white women aged 18-45 years with mild to moderate degrees of hair loss, the following response to Rogaine was reported: 19% of women reported moderate hair regrowth after using Rogaine for 8 months (19% had minimal regrowth; 40% had minimal regrowth). This compares with 7% of women reporting moderate hair regrowth after using the placebo, the liquid without the active ingredient in it, for 8 months (7% had moderate regrowth; 33% had minimal regrowth). If your degree of hair loss is more than that shown on the side of carton (shown below), Rogaine may not work.