Great question...I too would love to hear what anyone else knows about this. I stopped drinking coffee when I went raw, and only occasionally have had herbal or green tea since then. It seems to me that if we know high temperatures denature cells, why would tea be any different? Maybe sun-brewed tea is okay since it never really gets all that hot?

My compromise, early on in the diet, was to just drink hot water without dipping the tea-bag in - I used to do that a lot when skiing in blizzard conditions. I don't think it matters if mere water is heated as only steam is the result. Nowadays, my ability to withstand temperature extremes is a lot better than it was pre-raw diet so I'm less in need of it.

Technically speaking, teas are not really acceptable on a rawpalaeo diet given the heating involved. However, many of us compromise on minor issues(eg:- eating a little cooked-food on occasional social occasions, using chemicals re deodorants or whatever) so, as long as it's natural herbal tea and not commercial tea and drunk rarely, then that's OK. My father once invited an Indian to speak at his university, who told the assembled guests that the usual tea that's imported from India and similiar countries has come from the floor of the factory, has been treated with endless chemicals and is basically considered inferior to truly high-grade tea.