As alex said, yes, the intestinew is the best l-glutamine supplement I have found! I love that stuff! I just wish it wasn’t so expensive. I think it works better due to the added herbs. I am finding I have cured some of the leaky gut with probiotics and if I watch my diet very closely, then I can get by without it. However, that is still not the case all the time. I really believe at the beginning of the year though, I used it a lot, and it has helped me though!