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.
Paris to Los Angeles jet lag information
Lets assume you left Paris at 9:00am. The flight takes approximately 11 hours 4 minutes so you would arrive in Los Angeles at 9:12am Paris time which is in fact 12:12am Los Angeles time.
Your body will be telling you that its 9:12am but actually its now 12:12am