I once read somewhere that the health effects of green tea are null, and actually negative once it has cooled and allowed to sit for about a day. I think there was a mention of higher cancer incidence.
Personally, I don't believe this crap. For one, I haven't heard this since. And it just doesn't make sense that there would be a complete reversal of the health benefits once it cools and sits for awhile.
I'm wondering if anyone also remembers hearing of this. Although I do not believe the bit about negative health effects, if the benefits are just absent then drinking that old cup of green tea I forgot about the night before....why should I choke it down if it tastes awful?