Interesting article on fluoride in instant tea:
Now I know drinking an excess of instant tea is not a problem for most rfdters, but I found this observation interesting:
"Swallowing high levels of fluoride boosts bone density, but also makes bones more brittle. It can lead to skeletal fluorosis, which causes bone pain, calcified ligaments, bone spurs, fused vertebrae and difficulty in moving joints. It's a rare condition in the United States, Whyte said, but in some countries is more common than osteoporosis. He said regular consumers of high-fluoride brick tea made from old leaves, berries and plant twigs in parts of China and Tibet suffer aching, dense, poor-quality bones."
Could "brick tea made from old leaves, berries and plant twigs" be equated with puerh?