What is the daily recommended amount of caffeine for the average person?

None: There no recommended amount. Caffeine is not needed for healthful living. Moderate intake is not known to cause harm. Most people can take about 300 mg or about 3 cups of coffee. You need to see what you can tolerate, as higher doses may cause rapid heart rate, disturbance of sleep and excessive urination. See this site for more info. http://www.webmd.com/balance/caffeine-myths-and-facts.

Depends : Who is the average person? Each one has a different tolerance to caffeine or medications. Our rate of metabolism is different and it changes with our aging progress. Use it moderately and listen to your body , it will tell you how much is enough for you