This is the best!
Bought this first to try, it is great. I used to have terrible stomaches when I take room temperature or cold drinks in the morning. Since this, I never have any issue with taking any cold drinks. Diahorrea or any sort of stomach problems become so rare that my life is so normal and I cleanly forgotten I ever did have a weak stomach. Powder version works great in absorbing into your system. However, it is inconvenient for a working adult.
Though I have just switched to pill version, I never forget this brand and its effect on me.