I received this as a gift from Mastress Alita some time back. I was waiting for a hot day to try this tea as she suggested, cold-brewed, in Trader Joe’s lemonade. I used roughly 2 tablespoons to 16oz overnight in the fridge then transferred the hibiscus red brew to one of my insulated flasks to keep cold all day. Holy crap, what an amazing treat while working without shade all day. It was like a berry-fruit punch-lemonade with some earthiness from the guayusa on the swallow. Perfect sweet-tart combination and a nice thickness from that sugary lemonade.
As far as I can tell, the guayusa didn’t effect me negatively in any way like its cousin yerba maté often does. They’re in the same genus, Ilex, but must have differing alkaloids and/or levels and combinations. Or maybe less caffeine? If I’m feeling motivated later on, I’ll check the journals and see what I can find about both plants.
I’ll try the last bit brewed hot and see how that goes before rating.