I don't know how this stuff works, but it does! We used it for a trip to Myanmar (a 16-hour flight + and eight-hour flight) and had zero jet lag when we got there! We used it on the way home and still had a little adjustment when we got home, but nothing terrible. Buying this for every long trip I ever have!!
this is the first review i've given on a product in my life and i feel like it's absolutely necessary. i don't know how/why this stuff works but it is purely magic. just survived a trip to hong kong with hardly any jet lag, feeling so refreshed