Tea leaves steeping in a bowl

How Long Does It Take for Tea to Release Theophylline? Can It Cause Sleeplessness?

There’s a common rumor that steeping tea leaves for too long releases excessive theophylline, leading to side effects like toxicity or sleeplessness. Is this actually true? How Long Does It Take for Tea to Release Theophylline? Tea leaves do contain theophylline, and small amounts are released during brewing. However, the levels are extremely low and