How does a green tea diet work? Green tea is probably the only tea that is effective in helping lose the weight as well as keeping us healthy. A green tea diet simply involves the drinking of one cup of green tea daily or taking in green tea pills, coupled with exercise and healthy eating habits. Green tea health benefits include weight loss, cancer and heart disease prevention, regenerating skin cells and getting rid of cancer causing free radicals with its powerful antioxidants. These benefits are just some of the few reasons why people start drinking green tea and you should start now as well.