Yerba mate is my caffeine of choice and I suggested it to my Dad who gets bad migraines. He claims that when he feels a migraine coming on, he can drink a can a

Yerba mate is my caffeine of choice and I suggested it to my Dad who gets bad migraines. He claims that when he feels a migraine coming on, he can drink a can and it will result in a mild headache instead of forcing him to lie down in a dark room for hours.