(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.

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