I started using it after a bout of insomnia that lasted awhile and it did help well I think it did. I don't know if it was coincidence or not whether sleep just was improving on it's own but even from the first night things got better. I stayed on it every night for about a year. I was falling asleep in minutes compared to hours I used to. It had no side effects at all. I used to spend £60 on the 5% 30ml from h&b it used to last me 3 months having about 10 drops per night it doesn't taste nice but you get used to it. I stopped taking it earlier this year as I had run out and wanted to see how I was without it because I was sleeping so much better and I was fine still sleeping well since