How Much Caffeine is in Espresso, Monster, and Caffeine Pills?
The amount of caffeine in coffee, energy drinks, pre-workout, caffeine pills, and other energy supplements can greatly vary. As caffeine can impact heart health, kidney health, and more, it's important to know how much caffeine you should consume, how often, and when to do it.

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The Short Answer.
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One ounce of Espresso contains about 70mg caffeine
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The average Monster Energy Drink contains 160mg caffeine
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Most caffeine Pills contain around 200mg caffeine
How Much Caffeine is in a Shot of Espresso
How Much Caffeine Does Monster Have
Why Doesn't Caffeine Give Me Energy
How Much Caffeine While Pregnant
Unfortunately there have been proven negative effects on babies of mothers that used caffeine while pregnant. A scientific study in 2021 found that even moderate amounts of caffeine can have negative results: Pregnant women who consumed the caffeine equivalent of as little as half a cup of coffee a day on average had slightly smaller babies than pregnant women who did not consume caffeinated beverages, according to a study by researchers at the National Institutes of Health. The researchers found corresponding reductions in size and lean body mass for infants whose mothers consumed below the 200 milligrams of caffeine per day — about two cups of coffee — believed to increase risks to the fetus. Smaller birth size can place infants at higher risk of obesity, heart disease and diabetes later in life (4).
The researcher leading the study said, “Until we learn more, our results suggest it might be prudent to limit or forego caffeine-containing beverages during pregnancy. It’s also a good idea for women to consult their physicians about caffeine consumption during pregnancy.”
On top of negative effects to the baby after birth, caffeine is also linked to an increase in miscarriages (5). “According to a 2015 meta-analysis, the risk of miscarriage rose by 19% for every increase of 150 mg per day of caffeine and by 8% for every increase of two cups of coffee per day.”
Do Pre Workouts Cause Erectile Dysfunction
Erectile dysfunction (ED) is the inability to get and keep an erection firm enough for sex. Caffeine intake alone is not associated with erectile dysfunction and therefore the caffeine content contained within pre workout supplements cannot cause erectile dysfunction.
While pre workouts do not cause erectile dysfunction, you should always check the label on any pre workout supplement as they may contain other active ingredients beyond caffeine. Beware of energy supplements or pre workouts that do not list all of their ingredients along with dosages. A high quality energy supplement should leave nothing to speculation.
Some ingredients in pre workouts such as L-Arginine may actually have the side-effect of improving erections. However, if you are looking for a supplement to improve sexual performance there are specially formulated supplements for that purpose.
Caffeine Pills For Studying
Among the effective and legal energy drugs, caffeine is one of the most widely used. Caffeine pills usually contain around 200mg caffeine, so about the same as a very strong cup of coffee, or energy drink.
Caffeine can increase mental sharpness, keep you more alert, and allow you to have the mental energy to reason through problems more. One of the main uses for caffeine pills is extended study sessions. Caffeine pills are quick and easy to take, and allow the user to push through fatigue and study late into the evening. Some people find that even after studying on caffeine they still have energy, and need to do intense exercise before they can go to sleep.
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