hey rainbow brite, I suffer from migraines and was weary about doing LT, I did suffer from headaches for the first week or two but had the water and the painkillers and it went once my body got used to the change. Can I ask you are you splitting your shakes up throughout the day or are you having just three shakes three times a day. I know I spilt mine up into 6 smaller shakes so that I could battle the hunger, but it might also have helped with the headaches too...