So following the many websites, studies and people saying that glutamine is the Holy Grail for leaky gut or IBD I jumped and bought a kilogram of glutamine. I was planning to take it for two months. Now I think it sucks. Why? Since taking it my insomnia is back. And I found this: http://www.sciencedirect.com/science/article/pii/S0899900702007748 http://www.cortjohnson.org/blog/201...fs-puzzle-the-neuroinflammatory-series-pt-ii/ I should have thought twice. I knew glutamate could be elevated by glutamine supplementation but didn´t thought much of it. Now I realise this was causing my insomnia. I will give some of it to my brother and see what happens, if it affects him negatively too I will be dumping 40 dollars worth of glutamine. It is better than taking every morning a tablespoon of glutamate. @Valentijn the second link says N-acetylcsysteine (NAC) acts as a glutamate antagonist through facilitating the production of GABA. That might be why it helps you sleep! So, I feel stupid. And actually angry at myself for being so impulsive. I feel like I have been eating these days large doses of MSG snacks, which I always avoid like the plague. But I hope someone learns something from my experience.