Caffeine Contents in Coffee
Your genetics actually impact the effect that caffeine has on you. If you are a fast caffeine metabolizer, your body processes caffeine faster and you are at a lower risk of having negative side effects after consuming caffeine. If you are a slow metabolizer, your body takes a longer time to process caffeine and you may need to limit your intake to avoid negative effects.
Whether you are a fast or a slow caffeine metabolizer, it is important to follow the recommendations to consume no more than 400mg of caffeine (about 4 cups of coffee) per day.
Caffeine Content in Coffee Beverages
Cold Brew -153-238 mg/12 oz
Brewed Coffee - 95 mg/8 oz
Espresso - 63 mg/1 oz shot
Instant Coffee - 62 mg/8oz
Decaffeinated - 2 mg/8 oz