Orange Pekoe is the main grade and consists of long wiry leaves without tips. This grade is further classified into OP1 (more delicate than OP) Many researchers have proved that consuming Assam tea in the right dosage each day can reduce the risk of heart attack by 50%. The active ingredients in this tea play an important role in reducing the risk of high blood pressure, prevent blood clots and keeps blood vessels relaxed. Assam tea is known for its body, briskness, malty flavour, and strong, bright colour.