It could be dosage and timing. Coffee also affects my sleep but I need it to fight off my depression to some extent. So I have found one cup (250ml) early in t

It could be dosage and timing. Coffee also affects my sleep but I need it to fight off my depression to some extent. So I have found one cup (250ml) early in the morning doesn't affect my sleep. I have also found, I can have one more cup on the days I go running! (Physical exercise has something to do with caffeine efect on body) I have a personal rule of no caffeine after 4PM. It helps with sleep! (6 hours before sleep is the idea) I wasn't aware of these things until few years ago but now I do and I hope this helps someone!