Coffee represents 75% of all the caffeine consumed in the United States and the average annual coffee consumption of the American adult is 26.7 gallons, or over 400 cups.
Caffeine: 1,3,7-trimethylxanthine, (a methylated purine derivative) is present in coffee to the extent of about 4%. It stimulates both the heart and respiratory systems yet relaxes smooth muscle...for what it's worth. Studies tell us the human body will absorb only 300 milligrams of caffeine at a given time. Additional amounts are cast off and will provide no additional stimulation. The human body dissipates 20% of the caffeine in the system each hour.
Average amounts of caffeine in a cup (7 oz ) of coffee:
Drip . . . . 115-175
Espresso . . . . 100 mg of caffeine1 serving (1.5 - 2 oz):
Brewed . . . . 80-135
Instant . . . . 65-100
Decaf, brewed . . . . 3-4
Decaf, instant . . . . 2-3
tea, iced (12 ozs.) . . . . 70
tea, brewed, imported . . . . 60
tea, brewed, U.S. . . . . 40
tea, instant . . . . 30
According to the National Soft Drink
Association, the
following is the caffeine content in mgs per 12 oz can of soda:
Jolt . . . . 100.0
Sugar-Free Mr. Pibb . . . . 58.8
Mountain Dew . . . . 55.0 (no caffeine in Canada)
Diet Mountain Dew . . . . 55.0
Mello Yellow . . . . 52.8
Tab . . . . 46.8
Coca-Cola . . . . 45.6
Diet Cola . . . . 45.6
Shasta Cola . . . . 44.4
Shasta Cherry Cola . . . . 44.4
Shasta Diet Cola . . . . 44.4
Mr. Pibb . . . . 40.8
OK Soda . . . . 40.5
Dr. Pepper . . . . 39.6
Pepsi Cola . . . . 37.2
Aspen . . . . 36.0
Diet Pepsi . . . . 35.4
RC Cola . . . . 36.0
Diet RC . . . . 36.0
Diet Rite . . . . 36.0
Canada Dry Cola . . . . 30.0
Canada Dry Diet Cola . . . . 1.2
7 Up . . . . 0
Source: Coffee A GoGo
