Caffeine · caffeine free · Herbal Tea · Hormones · menopause · perimenopause · sleep · sleep issues · Tea · women's health ·Sep 02, 2022 Effects of caffeine and hormones by Candice Mason Typically it can take 4-6 hours for your body to metabolise half of your caffeine intake. That means if you had a coffee after 4pm and went to bed at 10pm half of your consumption would still be in your system. Continue reading