Avoid stimulants like caffeine past noon due to its average 6-hour half-life; matcha may be a preferred form with less negative sleep impact.

“I avoid stimulants past noon knowing that caffeine has on average a 6 hour half life. I previously stopped caffeine entirely as it created mood swings but recently reintroduced it via matcha as it creates a pleasant mental state without the swings and doesn't negatively effect my sleep.”