Day 3 of 40 days is almost over. I've had a sore throat so I've had a couple of cups of hot tea, organic throat coat, so really that's medicine. Right? Anyway, the caffeine headaches are getting less severe and later in the day. Excedrin helps with those. The family & I have saved $12 so far. That's 12 Africans with clean water for a year. Hope you all are doing well & that the headaches are few & the energy is high.