My horse has always had a sensitive belly which has led to frequent diarrhea episodes in the past. Since starting him on Digest More Plus about a year ago, we've only had a few mild episodes, nothing like he used to get. I can confidently say that this product works for him! He is also an old man (22) and it helped him keep weight on over the winter. This is a MUST for my horse. He is on Vitalize Hyaluronex as well which I saw a HUGE difference when I swapped him from a different HA supplement.