Which is richer in caffeine? Tea, coffee, or chocolate?

Coffee, tea, and chocolate are the main dietary sources of caffeine. Reasonable amounts won’t exceed the upper safe dose of caffeine.

How much caffeine do we consume?

Caffeine consumption varies worldwide. Adults in the U.K. consume about 130 mg of caffeine a day, while adults in Japan consume about 260 mg (8).

Actually, most adults consume between 100 and 300 mg of caffeine per day.

Coffee, tea, energy drinks, and other soft drinks contribute to the daily caffeine intake.

Energy drinks, in particular, may contain extremely high amounts of caffeine.

Certainly, you shouldn’t consume more caffeine than the upper safe dose. Higher amounts may lead to adverse effects.

What’s the caffeine content of green tea?

Tea leaves contain about 2–5% caffeine. The amount of caffeine in tea is determined by the leaf size, the brewing time and the temperature (1).

If you leave the tea leaves longer in the hot water, you’ll get more caffeine.

Both green and black tea contain caffeine. Green tea has a lower caffeine content, though. Black tea contains approximately 20 mg of caffeine per 100 mL, while green tea contains only 12 mg.

A cup of green tea contains about 30 mg of caffeine, while a cup of black tea contains about 48 mg of caffeine.

How much caffeine is in coffee?

Coffee contains more caffeine than tea. It contains about 40 mg of caffeine per 100g, or about 100 mg of caffeine per cup (10).

In contrast, decaffeinated coffee has negligible amounts of caffeine. It contains only 1 mg of caffeine per 100 mL.

The richest coffee variety in caffeine is Robusta. It contains between 140 and 200 mg of caffeine per a 6 oz cup. On the other hand, the lowest caffeine content is found in Arabica variety. It contains only 75–130 mg of caffeine per a 6 oz cup.

Is dark chocolate rich in caffeine?

The amount of caffeine in chocolate depends on the percentage of cacao solids. Dark chocolate with at least 60% cacao solids contains about 24 mg of caffeine per serving.


  1. NCBI – PMC: Tea polyphenols for health promotion
  2. Caffeine Intake from Food and Beverage Sources and Trends among Children and Adolescents in the United States: Review of National Quantitative Studies from 1999 to 2011
  3. The effects of caffeine intake on weight loss: a systematic review and dose-response meta-analysis of randomized controlled trials.
  4. Bodyweight loss and weight maintenance in relation to habitual caffeine intake and green tea supplementation.
  5. Changes in caffeine intake and long-term weight change in men and women
  6. European Journal of Clinical Nutrition: Caffeine intake is related to successful weight loss maintenance
  7. NCNI-PMC: The Impact of Caffeine and Coffee on Human Health
  8. The Safety of Ingested Caffeine: A Comprehensive Review
  9. USDA: Beverages, tea, instant, unsweetened, prepared with water
  10. USDA: Coffee, brewed