Ask the Doctor
Questions about kidney disease? Risk factors? Signs and symptoms? Are you concerned about yourself, a friend or family member? Ask Dr. Spry.
Which of these beverages, per serving, contains the most caffeine?
|Beverage||Serving Size (fluid ounces)||Amount of Caffeine (mg)|
|Cola||1 can - 12 oz.||29|
|Coffee||1 cup - 8 oz.||95*|
|Black tea||1 cup - 8 oz.||47*|
|Energy drink||1 can - 8.4 oz.||77|
What exactly is caffeine?
Caffeine is naturally found in the leaves and seeds of certain plants, but it can also be created artificially and added to food and drinks. In moderation, caffeine is known to help with alertness, but in excess it can cause nervousness or "jitters." Caffeine is also a mild diuretic which means it can lead to increased urine output by the kidneys. Some people experience this as an "urge" to use to bathroom after consuming caffeine, but it is usually short-lived.
For more information about caffeine and your kidneys, click here
Reference: USDA National Nutrient Database for Standard Reference
Coffee (8 fl. oz. serving)
(brewed from grounds, prepared with tap water)
Calories 2, Protein 0.28g, Fat 0.05g, Carbohydrate 0, Sodium 5 mg, Phosphorus 7 mg, Potassium 116 mg, Caffeine 95 mg
Soda (12 fl. oz serving)
(carbonated beverage, cola, contains caffeine)
Calories 136, Protein 0.02 g, Fat 0.01g, Carbohydrate 2.93 g, Sodium 15 mg, Phosphorus 37 mg, Potassium 7 mg, Caffeine 29 mg
Energy Drink (8.4 fl. oz.)
(RED BULL, with added caffeine, niacin, pantothenic acid, vitamins B6 and B12)
Calories 116, Protein 0.64 g, Fat 0.21 g, Carbohydrate 28.23g, Sodium 98 mg, Phosphorus 0 mg, Potassium 8 mg, Caffeine 77 mg
Tea (8 fl. oz.)
(Black, brewed, prepared with tap water)
Calories 2, Protein 0.0g, Fat 0.0 g, Carbohydrate 0.71 g, Sodium 7 mg, Phosphorus 2 mg, Potassium 88 mg, Caffeine 47 mg