Life, the Universe & Everything Else is a program promoting secular humanism and scientific skepticism presented by the Winnipeg Skeptics and the Humanists, Atheists & Agnostics of Manitoba.
Links: Pesticide Traces in Some Tea Exceed Allowable Limits (CBC) | Caffeine Ingestion and Fluid Balance: A Review (Journal of Human Nutrition and Dietetics) | Caffeine and Carbonated Soft Drinks | Caffeine Addiction Is a Mental Disorder, Doctors Say (National Geographic) | Coffee: The Greatest Addiction Ever (CGP Grey) | Good News About Coffee and Amazing Skeptic Conference (Scientific American Podcast) | New Mountain Dew Recipe in Canada | Does the LDS Church Own Coca-Cola? (Snopes) | Kopi Luwak (Wikipedia) | Coffee Enemas (Science-Based Medicine, Wikipedia) | Yerba Mate (Wikipedia) | The True Benefits of Herbal Tea (The Daily Mail)
Approximate Caffeine Content
Caveats: Numbers listed for coffee assume a drip-brew method. Numbers listed for tea assume the tea is steeped for 3 minutes. Equivalent beverage sizes are provided for Tim Hortons and Starbucks, but these numbers do not necessarily reflect the caffeine content of any particular brand, roast, or blend of coffee.
| Food Item | Serving | Caffeine |
| Coffee | 24 oz (Extra Large) | 394–600 mg |
| Coffee | 20 oz (Large, Venti) | 329–500 mg |
| Coffee | 16 oz (Grande) | 263–400 mg |
| Jolt Cola | 23.5 oz (695 mL) | 280 mg |
| Coffee | 14 oz (Medium) | 230–350 mg |
| Coffee | 12 oz (Tall) | 197–300 mg |
| Espresso | Double | 200 mg |
| Caffeine Tablet | Extra-strength | 200 mg |
| Coffee | 10 oz (Small) | 164–250 mg |
| Coffee | 8 oz (Extra Small, Short) | 131–200 mg |
| Espresso | Single | 100 mg |
| Caffeine Tablet | Regular-strength | 100 mg |
| Yerba Mate | 6 g mate powder | 85 mg |
| Red Bull | 8.5 oz (250 mL) | 80 mg |
| Mountain Dew | 12 oz (355 mL) | 54 mg |
| Lipton Iced Tea | 20 oz (600 mL) | 48 mg |
| Stash Earl Grey Black Tea | 8 oz | 48 mg |
| Exotica China White Tea | 8 oz | 37 mg |
| Stash Darjeeling Black Tea | 8 oz | 36 mg |
| Coca-Cola | 12 oz (355 mL) | 34 mg |
| Hershey's Special Dark Chocolate | 43 g | 31 mg |
| Guaraná Antarctica | 12 oz (355 mL) | 30 mg |
| Stash Premium Green Tea | 8 oz | 29 mg |
| Hershey's Milk Chocolate | 43 g | 10 mg |
| Coffee (Decaffeinated) | 8 oz (Extra Small, Short) | 6–17 mg |
| Herbal Tea/Tisane | Any amount | 0 mg |
Sources: Caffeine Content of Brewed Teas (Journal of Analytical Toxicology) | Caffeine in Food (Health Canada) | Caffeine Content of Food and Drugs (Center for Science in the Public Interest) | Caffeine Database (Caffeine Informer)
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