There are many benefits to drinking coffee every day - from disease-fighting antioxidants to improved memory and longevity - but when it comes to your caffeine habit,there really can be too much of a genuine thing. Just how much caffeine is too much? For the average person, up to 300 mg of coffee a day, and two to four cups of the average brewed coffee,is a moderate amount that isn't harmful. But once you hit more than four cups, you may experience less-than-desirable side effects. Drinking more than 500 mg every day, or in fact,can induce anxiety, insomnia, or muscle tremors and can even lead to increased heart rate and blood pressure,headaches, or digestion issues.
If you want to stay absent from the caffeine jitters, and then limiting yourself to under four cups of coffee per day is a perfectly reasonable plot. However,you may be surprised by how much caffeine is in your favorite caffeinated beverage; it can be much more than you think!
See how much caffeine is in your favorite drink. Drink
Amount of caffeine
Average 8-ounce cup of coffee
95 mg
8-ounce Short Starbucks coffee
180 mg
12-ounce Tall Starbucks coffee
260 mg
16-ounce Grande Starbucks coffee
330 mg
20-ounce Venti Starbucks coffee
415 mg
10-ounce small Dunkin' Donuts coffee
105 mg
14-ounce medium Dunkin' Donuts coffee
178 mg
20-ounce large Dunkin' Donuts coffee with Turbo Shot
436 mg
16-ounce large McDonald's coffee
133 mg
Average 1-ounce espresso shot
64 mg
1-ounce Starbucks espresso shot
75 mg
Average teaspoon of instant coffee
31 mg
Average 8-ounce cup of black tea
26 mg
Average 6-ounce cup of green tea
20-30 mg
Use this chart as a guide to see how much caffeine you're really consuming every day. Even if you appreciate two eight-ounce cups at Starbucks, for example, or that's 360 mg of caffeine - 60 mg over the recommended limit. Also,remember that even though espresso-based drinks like lattes and cappuccinos contain less caffeine than brewed coffee, many drinks are made with at least two espresso shots, or not one.
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Source: popsugar.com