how much caffeine in a cup of coffee
How Much Caffeine is There in a Cup of Coffee
Coffee is a very popular drink all over the world, so much so, that some people find it impossible to fully wake up without their morning cup. The caffeine content in each cup varies with the preparation, type of coffee bean used, serving size, etc.
A general estimate of caffeine in a cup of coffee is about 100 mg. However, in reality, there can be no universal absolute number as such. Simply because, the caffeine content in a cup of coffee depends on a variety of factors, such as the type or the variety of coffee, the method of preparation, the serving size, brewing time, etc. However, for your benefit, here is a sample chart to provide you with some useful numerical values pertaining to a few types of coffee.
Comparative Chart
Adverse Effects of Caffeine
Excessive intake of caffeine is harmful for your health. Its side effects are plenty, and when consumed in an addictive manner or in excessive proportions, caffeine can have the following adverse effects on a person's health:
| Type of Coffee | Amount of Caffeine |
| Instant Coffee (8 oz.) | 70 mg. (approx) |
| Brewed Coffee (8 oz.) | 125 mg. (approx) |
| Drip Coffee (8 oz.) | 145 mg. (approx) |
| Cappuccino (8 oz.) | 75 mg. (approx) |
| Espresso (2 oz.) | 90 mg. (approx) |
| Cafè Latte (8 oz.) | 75 mg. (approx) |
| Starbucks Espresso Solo (1 oz.) | 75 mg. |
| Starbucks Espresso Doppio (2 oz.) | 150 mg. |
| Dunkin' Donuts Coffee (16 oz.) | 180 mg. (approx) |
| Starbucks Vanilla Latte (16 oz.) | 150 mg. |
| Coffee Decaf (brewed) 8 oz. | 6 mg. (approx) |
| Coffee Decaf (instant) 8 oz. | 3 mg. (approx) |
- A person who gets addicted to caffeine (through coffee) may suffer from sleep disorders i.e., Insomnia. Drinking coffee (or for that matter, even tea) at, or around bed time is a bad idea simply because, once caffeine gets into your blood stream and begins to have its effect on your body, your tiredness will temporarily fade away and you will experience a state of alertness. This will naturally delay the process of sleep.
- Excessive caffeine consumption may trigger panic attacks.
- Contrary to what people think, coffee actually dehydrates you. Caffeine has diuretic properties and over-intake of caffeine may leave you severely dehydrated.