Coffee Affection is reader-supported. When you buy through links on our site, we may earn an affiliate commission. Learn more.

How Much Caffeine Is in Eternal Energy Xtra Strength? 2024 Breakdown


Caffeine (serving: 1.93 fl oz)
280 mg
Caffeine (mg / fl oz)
Caffeine strength

Energy drinks often receive a bad rep for their excessive amount of sugar and mysterious artificial ingredients. Enter Eternal Energy Xtra Strength, an energy shot that has significantly more caffeine than your average cup of coffee without all the sugar and carbs that are found in other popular energy drink beverages. A 2-ounce shot of Eternal Energy Xtra Strength packs 280 milligrams of caffeine. The extended-release formula is designed to slowly keep you caffeinated for 6-10 hours, as opposed to a quick release method found in their rival brand 5-Hour Energy. While Eternal Energy Xtra Strength is a healthier choice than most energy drinks, you should still watch your intake and never drink more than two bottles a day.

divider 3

What Is Eternal Energy Xtra Strength?

Launched in 2011, Eternal Energy is a company founded by Andrew Krause, who formerly worked for 5-Hour Energy. His products stand out from their competition by appealing to people who don’t want to spend a pile of money on caffeine. Eternal Energy drinks are sold at Walmart and online for a significantly cheaper price than 5-Hour Energy. A 12-pack of Eternal Energy Shots costs less than $2 per serving, compared to almost $3 for a regular 5-Hour Energy. Similarly, a 12-pack of Eternal Energy Xtra Strength costs about 75 cents cheaper than a comparable formula from 5-Hour Energy.

All Eternal Energy drinks are sugar-free and zero calorie, which appeal to health-conscious consumers. Fortified with over 25 vitamins, minerals, and antioxidants, these drinks are marketed as dietary supplements as opposed to novelty beverages.

LXR Biotech Eternal Energy® Shot Tropical Punch

How Much Caffeine Is in Other Popular Sugar-free Energy Drinks?

Eternal Energy Xtra Strength is certainly a minority in the energy drink market. Most energy drinks are sold in a standard 12- or 16-ounce format instead of a 2 ounce shot, and almost all of them contain a whopping amount of sugar. However, there are a few other sugar-free zero calorie energy drinks that are fairly similar.

Let’s look at how they compare in caffeine per milligrams:

Beverage Caffeine In Milligrams Per Ounce Caffeine Per Serving
Eternal Energy 111 milligrams 222 milligrams
Eternal Energy Xtra Strength 145 milligrams 280 milligrams
5-Hour Energy 100 milligrams 200 milligrams
5-Hour Energy Extra Strength 115 milligrams 230 milligrams
Bang Energy Shot 100 milligrams 300 milligrams
Phoenix Energy Shot 140 milligrams 280 milligrams

How Does Eternal Energy Xtra Strength Compare to Other Caffeinated Beverages?

Eternal Energy Xtra Strength drastically outperforms coffee in terms of caffeine per milligram and per serving. An average 8-ounce cup of coffee contains approximately 95 milligrams of caffeine. The exact amount fluctuates greatly depending on the brewing method and the beans you use, but Eternal Energy Xtra Strength will almost always contain more caffeine per milligram, if not per serving. This can be a good thing if you’re seeking a powerful energy boost, but something to consider if you’re being mindful of your caffeine intake.

Tea and sodas usually hover around 25-100 milligrams per 8-ounce serving. They’re a more moderate choice than energy drinks and coffee, which tend to gravitate towards the higher end of the caffeine scale. Eternal Energy Xtra Strength is actually considered to have an extremely high amount of caffeine—even more than a typical energy drink which averages 100-300 milligrams per serving.

With 280 milligrams per serving, it may seem like Eternal Energy Xtra Strength isn’t too far from average. However, it’s important to realize that most energy drinks come in 12–16-ounce cans, which means that they contain significantly less caffeine per fluid ounce compared to these concentrated energy shots.

LXR Biotech Eternal Energy Shot Lime

Is Eternal Energy Xtra Strength a Healthy Choice?

Since there’s no sugar or calories, there are fewer things to worry about when you consider drinking a bottle of Eternal Energy Xtra Strength. It’s certainly a healthier choice than a sugary can of Monster, but you still need to calculate the caffeine amount to make sure you’re not going overboard.

While we would love to believe that we could down energy shots and sip coffee all day without any negative health repercussions, you can truly have too much of a good thing. Consistently drinking too much caffeine can lend itself to undesirable effects, such as insomnia, jitteriness, nervousness, and occasional heart palpitations. Sometimes individuals that weren’t previously intolerant may even become intolerant of caffeine after they’ve made a habit of consumption at high levels.

The FDA guidelines state that adults should have no more than 400 milligrams of caffeine per day. That’s just slightly under two full bottles of the 2-ounce Eternal Energy Xtra Strength drinks. Indeed, the company cautions on their website that adults should have no more than two servings per day, spread out at least 6 hours apart. Pregnant and nursing women, children under age 12, and anyone sensitive or intolerant to caffeine should avoid consuming Eternal Energy altogether.

Of course, you’ll also need to take other sources of caffeine into consideration, such as coffee, soda, chocolate, and some tea. Two servings of Eternal Energy Xtra Strength may greatly exceed the 400-milligram guideline if you regularly partake in other caffeinated beverages as well.

divider 3


Eternal Energy Xtra Strength gives you nearly 300 milligrams of caffeine per serving—a hefty amount to power you through your day. While you shouldn’t have as many health concerns with this sugar-free, zero-calorie formula as you would with more popular energy drinks, you should still be mindful of the 400-milligram caffeine limit proposed by the FDA and weigh in other sources of caffeine when deciding whether to reach for another bottle. You should avoid Eternal Energy Xtra Strength altogether if you’re under 12, pregnant, nursing, or sensitive to caffeine.

See also:



If there's a pencil and paper on her desk, Brooke Bundy has a cup of coffee (or tea) in her hand. Brooke worked in a coffee shop for three years while she finished her Bachelor's degree in Media Studies, and studied to be a writer. She met her future husband in the coffee shop where he lingered too long over deep conversations and dark roast coffee. Now they're happily married in New Orleans, LA, where they spend their free time exploring parks and cafes with their dog Tuggles.

Read more

Related posts

Other Categories