Not all polyphenols are the same. For example, thearubigins, the kind that is most abundant in black teas, has not been recognised as a health contributing matter by the science community. On the other hand, tea catechins, including such well known members as EGCG (epigallocatechin-3-gallate) have been found to be effective protective ingredients.
There are a lot more tea catechins in green and white tea than blacks. There are a lot more EGCG in finer green tea than lower quality ones. See article in: https://www.teaguardian.com/health/tea_catechins_quantity_differences.html
White tea is different from green tea not by how much catechins it contains but rather with an additional component that exists because of the slight fermentation processing — theobromine — which acts in synergy with the other salutary matters to deliver the special health effects of white teas.
That is not to say that other teas are not health contributing, however. For example theaflavins in black and oolong teas are also effective against circulatory problems, except that they don’t exist in these tea in as large amount as EGCG in fine green teas. There are, however, other health effects that tea varieties outside of green and white that are being researched. Pu’er and oolong teas are hot topics in the East, where finer quality ones are a lot more accessible and so the effect is more real in larger scale population studies. Individual reports are there, except some conclusive ones such as those for green teas have yet to be made.
To choose a tea for a healthy habit, the first priority is that you have to enjoy drinking the tea. I advise you read some more articles in the Tea Guardian about health, such as this one: http://teaguardian.com/health/health_orientation.html
Let me know your thoughts afterwards.
