A new study claims that `metformin` a commonly used diabetes drug has the potential to reduce the risk of heart diseases in non-diabetic patients. Researchers also claim that metformin could reverse the harmful thickening of the heart muscle that leads to cardiovascular diseases. The study was published in the medical journal European Heart. The study showed that metformin used to treat type 2 diabetes safely for the last six decades reduced left ventricular hypertrophy (LVH) in patients with prediabetes and pre-existing heart disease. LVH is the thickening of the muscle wall in the heart`s left pumping chamber and is a