I just found it too frustrating. since insomnia had not generally been one of my symptoms, to take something that causes it, for days on end, in my case, is too much of a step down. I also felt no benefit to my cognitive functioning, which is my personal holy grail right now. A small increase in aerobic capacity at the expense of all my sleep and a resulting worsening of even my meagre cognitive functioning is just not worth it. I tried it for nearly two months, only taking every week even, and could not get past the insomnia, in fact it got worse. Even my normal old sleep which I need way too much of is preferable to lying awake at night. I also don't want to start taking a sleeping pill in order to take a medication. That is just adding in way too many factors for me and I don't want to permanently mess up my sleep. Since taking the LDN, other supplements have affected my sleep much more so than they did before, so I think there is some lasting effect form the LDN. Way too scary for me. Glad it is working for others.