Are there any natural remedies to treat jet lag?

Yes: Melatonin 0.5-3 mg at bedtime for 3 days after arriving may speed recovery. Homeopathy is found to be helpful by many. Another simple thing to try is "earthing" which involves spending time barefoot in the dirt, sand or grass after arrival - see http://www.Townsendletter.Com/may2010/earthing0510.Html for earthing info & http://altmedicine.About.Com/od/aznaturalremedyindex/a/jet_lag_remedy.Htm.