I quit drinking alcohol and it fixed all of my sleep problems. I was routinely waking up in the middle of the night and unable to fall back asleep even on days

I quit drinking alcohol and it fixed all of my sleep problems. I was routinely waking up in the middle of the night and unable to fall back asleep even on days I did not drink. Now I fall back asleep instantly. I tried eliminating caffeine and practicing mindfulness before cutting out alcohol. I only stopped to be healthier, was pleasantly surprised when all my sleep issues went away. Have resumed my caffeine intake without any problems.