Uncle Lee's Organic Pu-Erh Tea Bags

Pu-erh is a post-fermented tea from Yunnan Province in southwest China, made from the large-leaf Camellia sinensis var. assamica plant. Unlike green or black teas, it is defined by its capacity for ongoing microbial fermentation — the leaf continues to chemically evolve for years or decades after processing. It exists in two forms: raw (sheng), which ages slowly through natural oxidation and microbial activity, and ripe (shou), which is rapidly fermented in piles to mimic decades of aging in about 45–60 days.

Pu-erh — particularly young raw sheng — contains substantial caffeine and a complex stimulant profile that many drinkers describe as energizing for several hours. Aged sheng and ripe shou are often gentler subjectively because their catechins have largely polymerized into theabrownins, but the underlying caffeine load can still be high. Drinkers sensitive to caffeine typically find evening pu-erh disrupts sleep; favoring a later steep — which extracts less caffeine than the first — is one common workaround.

Because pu-erh is high in caffeine, people sensitive to stimulants, those with cardiac arrhythmia, and pregnant individuals should moderate intake or favor later steeps that extract less caffeine. Immunocompromised drinkers — transplant recipients, those on immunosuppressants, severe asthmatics — should avoid handling visibly moldy compressed cakes, since species like Aspergillus fumigatus that occur in pu-erh can be opportunistic pathogens, although the brewed tea itself is generally low-risk. Drinkers who are highly tannin-sensitive may find young raw pu-erh harsh on an empty stomach.