I was losing about 1.5 to 2 lbs. per week and drinking what I would call an average amount of water (1-3 liters). I increased it dramatically in the last two weeks (5-8 liters) and I have lost 4 lbs. each week. Of course, the other factor in play is that, with the increased water consumption, my black coffee and Diet Dr. Pepper consumption has dropped drastically. So is it the increase in water... or the decrease in caffeine?