Dr. H. Marques treated a number of patients with zinc ions. He placed pads with a 2% solution of zinc chloride over the bald patches and used the negative pole. He administered three treatments a week, increasing the current to 15 ma. Hair began to appear in about eight days. One patient had no hair at all on his scalp. He began to sprout new hair 12 days after the ion treatment. About half of Marques’ cases treated with zinc had hair regrowth.