Healthiest Energy Drinks (2026): 19 Cans Scored on Caffeine & Sugar

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Quick answer: Healthy energy drinks keep caffeine at about 125 mg per can or less and have zero sugar. Our top pick is Zevia Energy: 120 mg of caffeine, no sugar, sweetened with stevia. For a natural yerba mate option, try Clean Cause Zero Sugar. For the least caffeine, Aspire has 80 mg. The drinks to limit are Bang and Reign (300 mg of caffeine per can) and original Monster, which has 54 grams of added sugar, more than a full day’s limit.

Search for the healthiest energy drink and most of what you’ll find are blog posts written by energy drink brands about their own cans. So we did it the independent way. We checked the US labels of 19 popular energy drinks, put them in one table, and scored them all with the same simple rules. We also did one thing almost nobody does: we converted caffeine to the same 12 oz serving, because cans come in 8.4, 12, 15.5 and 16 oz sizes.

The Healthiest Energy Drinks: Our Picks

Pick	Caffeine	Sugar	Sweetener	Best for
Zevia Energy	120 mg (12 oz)	0 g	Stevia	Best overall
Juno Energy	125 mg (12 oz)	0 g	Organic stevia	Best organic
Aspire	80 mg (12 oz)	0 g	Sucralose	Lowest caffeine
Clean Cause Zero Sugar	160 mg (16 oz)	0 g	Erythritol, stevia	Best yerba mate
Gorgie	150 mg (12 oz)	0 g	Stevia (most flavors)	Best green tea caffeine
Monster Zero Ultra	150 mg (16 oz)	0 g	Erythritol, sucralose	Best mainstream swap

Prices and stock change often, so check the current price before you buy. Labels can differ between flavors of the same brand.

1. Zevia Energy: Best Overall

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Zevia keeps it simple: carbonated water, citric acid, natural flavors, stevia and caffeine. Each 12 oz can has 120 mg of caffeine, zero sugar and zero calories. That’s a moderate dose, closer to a cup of coffee than to a 300 mg gym can, and it has one of the shortest ingredient lists we found, with no artificial sweeteners.

2. Juno Energy: Best Organic

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Juno uses 125 mg of organic caffeine from green coffee beans, sweetens with stevia and adds a little real fruit juice and electrolytes like potassium and calcium. It has zero sugar. It’s a newer brand with far fewer reviews than the big names, so it’s the pick for label readers who want organic ingredients, not the safe crowd favorite.

3. Aspire: Lowest Caffeine

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If strong energy drinks make you jittery, Aspire has just 80 mg of caffeine per 12 oz can, from green tea and guarana, with zero sugar and zero calories. The trade-off: it’s sweetened with sucralose. Liquid Death Energy is another low-dose option at 100 mg, also sweetened with sucralose.

4. Clean Cause Zero Sugar: Best Yerba Mate

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If you want a natural energy drink, yerba mate is a popular choice. Clean Cause’s zero sugar line is USDA Organic, has 0 calories and 160 mg of caffeine per 16 oz can, which works out to 120 mg per 12 oz. The label we checked is sweetened with organic erythritol and stevia. Skip the brand’s regular cans if you’re avoiding sugar: those are sweetened with cane sugar.

5. Gorgie: Best Green Tea Caffeine

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Gorgie has 150 mg of caffeine from green tea per 12 oz can, plus L-theanine, with zero sugar and 5 calories. Most flavors are sweetened with stevia, but at least one flavor label we found also lists sucralose and acesulfame potassium, so check the can if that matters to you.

6. Monster Zero Ultra: Best Mainstream Swap

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Not ready to give up your usual brand? The white Monster can has 150 mg of caffeine per 16 oz, zero sugar and 10 calories, according to Monster. Compared with original Monster, you skip 54 grams of added sugar and get slightly less caffeine. It’s sweetened with erythritol and sucralose.

The Energy Drink Scorecard: 19 Popular Cans Compared

Here’s every drink we checked, sorted from best grade to worst. “Per 12 oz” shows how strong each drink really is once you remove the can size trick.

Drink	Can	Caffeine per can	Per 12 oz	Sugar	Sweeteners	Grade
Aspire	12 oz	80 mg	80 mg	0 g	Sucralose	A
Red Bull Sugarfree	8.4 oz	80 mg	114 mg	0 g	Aspartame, acesulfame K	A
Liquid Death Energy	12 oz	100 mg	100 mg	0 g	Sucralose	A
Zevia Energy	12 oz	120 mg	120 mg	0 g	Stevia	A
Juno Energy	12 oz	125 mg	125 mg	0 g	Stevia	A
Gorgie	12 oz	150 mg	150 mg	0 g	Stevia (some flavors add sucralose, acesulfame K)	B
Monster Zero Ultra	16 oz	150 mg	113 mg	0 g	Erythritol, sucralose	B
Clean Cause Zero Sugar	16 oz	160 mg	120 mg	0 g	Erythritol, stevia	B
Guayakí Yerba Mate	15.5 oz	150 mg	116 mg	Yes (cane sugar)	Organic cane sugar	C
Red Bull (original)	8.4 oz	80 mg	114 mg	27 g	Sugar, glucose	C
Bloom Sparkling Energy	12 oz	180 mg	180 mg	0 g	Sucralose	C
Celsius	12 oz	200 mg	200 mg	0 g	Sucralose	C
Alani Nu	12 oz	200 mg	200 mg	0 g	Erythritol, sucralose, acesulfame K	C
Prime Energy	16 oz	200 mg	150 mg	0 g	Sucralose, acesulfame K	C
Ghost Energy	16 oz	200 mg	150 mg	0 g	Sucralose, acesulfame K	C
C4 Performance Energy	16 oz	200 mg	150 mg	0 g	Sucralose, acesulfame K	C
Monster (original green)	16 oz	160 mg	120 mg	54 g	Sugar, glucose, sucralose	D
Bang Energy	16 oz	300 mg	225 mg	0 g	Sucralose	D
Reign Total Body Fuel	16 oz	300 mg	225 mg	0 g	Sucralose	D

Sources: each brand’s US product listing, Monster‘s own site, and US labels logged in the Open Food Facts database, checked in October 2026. Prime Energy also comes in a 12 oz can with the same 200 mg.

How We Graded Each Drink

• A: zero sugar and 125 mg of caffeine or less per can.
• B: zero sugar and 126 to 160 mg per can.
• C: 161 to 200 mg per can, or contains added sugar.
• D: more than 200 mg per can, or more than 40 g of sugar.

We didn’t grade sweeteners, because the research on them is still mixed (more on that below). Instead, we list them so you can choose for yourself.

What the Scorecard Shows

• Small cans can fool you. Red Bull Sugarfree looks mild at 80 mg, but per 12 oz it’s about as strong as Monster Zero Ultra or Guayakí.
• Celsius and Alani Nu are the most concentrated of the popular zero-sugar drinks. They pack 200 mg into a 12 oz can, while Ghost, C4 and Prime spread the same 200 mg across 16 oz.
• “Healthy” branding doesn’t mean low caffeine. Bloom and Celsius market themselves as wellness brands, but both land in the C group because of their caffeine.
• “Natural caffeine” is still caffeine. Caffeine from green tea, coffee beans or yerba mate is the same compound your body gets from any other source. What matters is the amount.

The Worst Energy Drinks for You

Two problems put a drink in our D group: too much caffeine in one can, or a full day’s sugar in one can.

• Bang and Reign: 300 mg of caffeine per can. That’s three quarters of the 400 mg a day the FDA says is not generally linked to negative effects for most adults, in a single drink.
• Original Monster: 54 g of added sugar per 16 oz can. The FDA’s Daily Value for added sugar is 50 g for the whole day.
• Original Red Bull: not in the D group, but its 27 g of sugar is more than half a day’s limit in an 8.4 oz can.

The FDA notes that most energy drinks have between 41 and 246 mg of caffeine per 12 ounces. Every drink in our D group goes beyond that range or beyond the daily sugar limit.

What Makes an Energy Drink Healthy (or Clean)?

“Clean” and “healthy” aren’t official terms, so brands can use them freely. Here’s what actually matters on the label:

• Caffeine: for most adults, the FDA cites 400 mg a day as an amount not generally linked to negative effects. Staying at 150 mg or less per can leaves room for your coffee or tea.
• Sugar: zero or close to it. A sugary energy drink can use up most of your daily added sugar limit in one can.
• Short ingredient list: fewer extras makes it easier to know what you’re drinking.
• Not for kids: the American Academy of Pediatrics says caffeine and other stimulants in energy drinks have no place in the diet of children and adolescents.

What About the Sweeteners?

Every zero-sugar energy drink uses some kind of sweetener, and none of them gets a perfectly clean bill of health:

• All non-sugar sweeteners: in 2023, the World Health Organization issued a conditional guideline advising against using them to control body weight. It covers sucralose, acesulfame K and aspartame, and also stevia. It doesn’t apply to people with diabetes.
• Aspartame (in Red Bull Sugarfree): a WHO cancer agency classified it as possibly carcinogenic in 2023, based on limited evidence. At the same time, WHO’s food additive experts kept the safe daily limit at 40 mg per kg of body weight. For a 70 kg adult, that’s more than 9 to 14 cans of diet soda a day.
• Erythritol (in Alani Nu, Monster Zero Ultra, Clean Cause Zero Sugar): a 2023 study in Nature Medicine linked higher blood levels of erythritol to heart attack and stroke risk in people already being checked for heart problems. It shows a link, not proof, and the researchers called for more long-term safety studies.

Our take: if sweeteners worry you, choose stevia-sweetened drinks like Zevia or Juno, or drink fewer cans. Swapping a sugary energy drink for a zero-sugar one still cuts a lot of added sugar.

Is Celsius, Alani Nu, Bloom or Prime Healthy?

• Celsius: zero sugar and sweetened with sucralose, but 200 mg of caffeine in a 12 oz can makes it one of the strongest popular drinks per ounce. The label says not to drink more than two a day. Grade C. Read our full investigation: Is Celsius bad for you?
• Alani Nu: 200 mg of caffeine, zero sugar, sweetened with erythritol, sucralose and acesulfame K. Grade C.
• Bloom Sparkling Energy: 180 mg of caffeine, zero sugar, sweetened with sucralose, with added prebiotic fiber. Grade C.
• Prime Energy: 200 mg of caffeine per can and the subject of several lawsuits. Read our full investigation: Is Prime healthy?

The PrimeDigger Verdict

No energy drink is a health drink, but some are much better choices than others. If you want one, pick a can with zero sugar and 150 mg of caffeine or less. Zevia Energy is our top pick, Juno is the best organic option, Aspire has the least caffeine, and Clean Cause Zero Sugar is the best yerba mate choice. If you drink Celsius or Alani Nu every day, switching to Zevia, Juno or Aspire cuts your caffeine by more than a third.

More PrimeDigger investigations: is Prime healthy?, protein powder without lead and the best creatine for women.

This article is for general information, not medical advice. If you’re pregnant, have a heart condition, take medication or are sensitive to caffeine, talk to your doctor before drinking energy drinks.

Want the full picture? Our ebook The Energy Drink Bible goes deeper: how much caffeine is too much for you, the can-size trick, what’s really in the “energy blend,” the Celsius studies and Prime lawsuits, a chapter for parents of teens, and a 14-day plan to cut back, with 5 printable tools. Get the ebook ($19) → See all our ebooks →

Frequently Asked Questions

Sources

• FDA: Spilling the Beans, How Much Caffeine Is Too Much?
• FDA: Added Sugars on the Nutrition Facts Label
• American Academy of Pediatrics (2011), Pediatrics: Sports drinks and energy drinks for children and adolescents
• World Health Organization: Guideline on non-sugar sweeteners (May 2023)
• World Health Organization: Aspartame hazard and risk assessment results (July 2023)
• Witkowski et al. (2023), Nature Medicine: The artificial sweetener erythritol and cardiovascular event risk
• Monster Energy: Zero Ultra product page
• Open Food Facts: product label database

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