Energy drinks, including Starbucks Doubleshot Energy, can provide a quick burst of energy due to their high caffeine content. However, consuming excessive amounts of caffeine can lead to various health issues, such as increased heart rate, high blood pressure, and insomnia.

Starbucks Doubleshot® Espresso. A bold, two shots of our 100% Arabica signature espresso coffee and smooth creamy milk. The perfect coffee boost to kickstart your day.

You get a caffeine kick without the jitters and it tastes great! I can't drink a cup of coffee in the afternoon or evening or I'd be up later than I already am! This delicious coffee drink gives me a bit of a kick mid-afternoon when I need it most.

There is 135mg of caffeine in a single 15 fl oz can of Starbucks Doubleshot Energy Vanilla Fortified Energy Coffee Drink.

The FDA estimates toxic effects, like seizures, can be observed with rapid consumption of around 1,200 milligrams of caffeine, or 0.15 tablespoons of pure caffeine.

Single shots tend to have between 45 and 75mg of caffeine each. The average is 63 mg. If you're going deluxe and ordering a double, you can expect a caffeine boost of between 70 and 120mg per double shot.

According to coffeechemistry.com, one liquid ounce of espresso can have anywhere between 30 and 50mg of caffeine. That means that a double shot will likely have anywhere between 60 and 100mg. Well, that's about it for the simple explanation. And honestly, that going to be enough for most people.

The U.S. hasn't developed guidelines for caffeine intake, but medical organizations generally recommend the following: Adults: Less than 400 mg of caffeine a day. Age 12-18: Less than 100 mg. Age 10-11: Less than 85 mg.

For healthy adults, up to 400 mg/day is considered safe. Pregnant or breastfeeding women are advised to consume no more than 200 mg/day. People with cardiovascular health issues should also consider limiting their caffeine intake.

A healthy adult can consume around 400 milligrams of caffeine daily, which means you can safely have about four cups of coffee in a day unless otherwise advised by your doctor. Consumption of 200 milligrams of caffeine doesn't cause any significant harmful effects in healthy people.

500-600mg/day is categorized as “heavy use” but can be handled by most healthy adults, while >700mg/day is generally considered the upper limit for ingestion - depending on age, medical history and sensitivity or tolerance.

The Centers for Disease Control and Prevention (CDC) defines moderation as one to two alcoholic drinks or less per day, depending on your gender. For vodka, this means one or two standard shots measured at approximately 1.5 ounces each (at 80 proof).