I am so unhappy with this product. I wanted to try L-glutamine for focusing. It is PURE MSG. I am sensitive to msg all humans are to a level some more others less. I am in my last semester in graduate school doing my masters in nutrition and food science. Anyway, L-glutamine is naturally in our bodies already but people with IBS and leaky gut syndrome are deficient and GLUTAMIC ACID can help not this. I got the same symptoms I get form MSG with this MSG is monosodium GLUTAMATE! I am sad I lost my money and tried this for 4 days with very bad symptoms form my veins hurting and mouth swelling. Face turning red. Definitely dangerous and not for me! I will try glutamic acid or another form which is not made out of msg ! Synthetic forms or l-glutamine as in frm supplementation is hard to get from which your body will be able to use without such dangerous effects.