The best Pu'er tea, in terms of quality, is generally considered to be ancient tree Pu'er. This type of tea is made from leaves harvested from very old tea trees, which are typically over 100 years old. The age of the trees contributes to the rich, complex flavors and high health benefits associated with Pu'er tea. According to a study published in the Journal of Ethnopharmacology, ancient tree Pu'er contains higher levels of antioxidants and polyphenols compared to tea from younger trees. These compounds are known for their anti-inflammatory and anti-aging properties, making ancient tree Pu'er a premium choice among tea enthusiasts.