(CBSNewYork/CBS Local) — Four appears to be the magic number when it comes to coffee.
A new study finds drinking four cups of java a day could be good for your heart.
German researchers say caffeine promotes the movement of a regulatory protein that can protect cardiovascular cells from damage.
They found it was sufficient to help guard against cell death and help your ticker recover after a heart attack.
The study is published in the journal PLOS Biology.