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.
Manchester to San Francisco jet lag information
Lets assume you left Manchester at 9:00am. The flight takes approximately 10 hours 11 minutes so you would arrive in San Francisco at 9:12am Manchester time which is in fact 1:12am San Francisco time.
Your body will be telling you that its 9:12am but actually its now 1:12am