Many researches show that Green Tea is beneficial in protecting against cancer, infections including HIV. It also improves the immune system as well. It is also said that it is helpful in rheumatoid arthritis, and heart diseases. Green tea may also be helpful for Alzheimer’s disease (most common type of Dementia) as well as Parkinson’s disease. Some scientists claim that it is also useful for multiple sclerosis. Many people are using green tea to burn their calories to reduce their weight.