I love colosan - I also put a few drips of stevia in it to seeten it - and use warm water. Follow by lemon juice (at least half a lemon, I think, also in warm water. Easy to down, and effective. I found with P&B shakes, no matter how much of them I drank, plus water after and inbetween, I got constipated!
Colosan is a dream! I also use malic acid tablets daily, but not downed with the colosan, at other times.