I make trips back home to Israel from the US several times a year (A 6-7 hour difference). Every time I do I have to allocate an extra 5 days of no sleep and horrible jet lag just so I could get adjusted. On my recent trip I used Timeshifter and it was a LIFE SAVER. I tried to follow the plan as best as I could (can’t say it went perfectly) and still had no jet lag whatsoever. For the first time ever I could actually sleep during my first night home, and by the third day I was feeling great and energized. I couldn’t stop raving about it to anyone I met. Highly recommended!