I don't know much about white tea but yes green tea is really known for its good medical value and it can cure diseases relating to heart and blood sugar levels. I have also heard that it has the least side effects even when consumed in large quantities say seven to eight cups per day...
Apart from drinking tea, I think that regular free hand exercise in the morning or a brisk walking say for forty minutes or a yoga session helps a lot to stay a healthy and sound life...
White tea is a tea made with leaves that are processed in a manner to let them wilt slightly and lose the "grassy" taste of green tea, while undergoing minimal oxidation.