Guava leaves are full of vitamins, minerals, antioxidants and can be beneficial for your heart health also. Studies suggest that guava leaf extract can help in reducing LDL levels (bad cholesterol) and increasing HDL levels (good cholesterol) in the body. The reduction in bad cholesterol levels means a heathy heart. The antioxidants found in guavas reduce the oxidative stress, which is important for the health of our heart and can lower the risk of heart failure too.