What are the benefits of drinking coffee?

Does bilirubin of liver disease patient drink coffee energetically? Mr. Shen is a hepatitis B patients, the last time to the hospital for examination, the doctor pointed out that his bilirubin is relatively high, so he needs to pay more attention in life, but Mr. Shen is currently running an online store, need a lot of work every day, at noon every day Hu a little sleepy, so he likes to make a cup of coffee to help themselves