system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: how does chamomile tea make you calm/sleepy?
gpt
It might not. A quick glance at studies and suggestions online for chamomile tea are full of phrases like "may help", "might promote better sleep" and "could possibly make you sleepy". Nothing concrete or definitive. 

It's a herbal blend tea that smells sweet and gentle and is associated with calmness. It might be a placebo effect.