[slothtrop]

Reducing total caffeine intake has improved my sleep quality, but I find there are diminishing returns to making it nil consumption. My sweet spot is a single small cup of tea or coffee in the morning. Research suggests that some trace amounts of caffeine can remain in your system many hours.

[gedy]

Same here, I ironically found I was more tense & jittery after no caffeine for a year.

Found one coffee or tea a day made me feel much more relaxed at end of day.