Many frequent flyers stand by the fact that if you keep yourself hydrated and get plenty of rest the effects of jet lag should go within a few days. However, there are some other ways to stop Jet Lags effects and there are remedies to stop you getting it all together.
Roma to Lansing jet lag information
Lets assume you left Roma at 9:00am. The flight takes approximately 18 hours 10 minutes so you would arrive in Lansing at 9:12am Roma time which is in fact 11:12pm Lansing time.
Your body will be telling you that its 9:12am but actually its now 11:12pm