Green coffee beans are getting more attention as of late, and their benefits may surprise you! They are simply regular coffee beans that haven’t been roasted, and remain completely raw. Note that there IS caffeine in this product - but not as much as roasted coffee beans. In fact, they have about 1/3 the caffeine as a cup of coffee (~35mg).
 
Some potential benefits include: 
Lowering blood sugar
Blocking fat buildup by accelerating metabolism
Appetite suppression
Lowering high blood pressure 
Some evidence of reducing risk of heart disease and Type 2 Diabetes