I often get week long headaches during my menstrual cycle. This time, over the counter pain relief was not really working. After reading EC, I decided to try magnesium for relief. The magnesium did not work at all so I decided to try liquid b complex. I took one dose and nothing happened. Then, I took another dose and the headache was instantly gone. I decided to double the dose every day for the week and I felt GREAT!!! For anyone suffering from migraine type monthly headaches, please give this a try. I think the liquid supplement was able to be absorbed much faster than the pill form. Thank you EC!!!