Is caffeine a health hazard? A former Colorado student finds out

Listen Now
Photo: Caffeine Book Murray Carpenter
Journalist Murray Carpenter enjoys a cup of coffee and the caffeine buzz that goes with it.

  • Single shot espresso—approx. 75 mg (per Starbucks website)
  • Mocha—approx 175 mg per 16-ounce (grande), (per Starbucks website)
  • Starbucks Bold Pick of the day—approx. 330 mg per 16 ounces (grande) (per Starbucks website)

  • Coca Cola —34 mg per 12 ounce can
  • Dr. Pepper—41 mg per 12 ounces
  • Diet Coke—45 mg per 12 ounces
  • Starbucks Refreshers—50 mg per 12 ounce can
  • Mountain Dew—54 mg per 12 ounces
  • Pepsi Max—69 mg per 12 ounces

  • Red Bull can—80 mg per 8.4 ounce can
  • Mountain Dew Kickstart—92 mg per 16 ounces
  • Monster—184 mg per 16 ounces (per Consumer Reports)
  • 5-hour Energy—215 mg per 1.9 oz shot (per Consumer Reports)
  • Kraft Mio Energy (concentrate, 12 servings)—720 mg per 1.08 oz (labeled amount)

  • Stash Premium Green Tea—36 mg per six ounces
  • Twining's English Breakfast Tea—25 mg per six ounces
  • Lipton tea—47 mg per six ounces
  • (All teas were made with with 5-minute steep)
  • Chai Tea Latte—approx. 95 mg per 16 ounce (grande) size, according to Starbucks

  • Hershey’s Milk Chocolate—9 mg per 43 grams
  • Scharrfen Berger 82% Cacao Extra Dark Chocolate—42 mg per 43 gram serving

  • Vivarin—200 mg per tablet