Celsius Ingredients: What’s in the Can and Is It Bad for You?

Last reviewed: October 2026. Reflects the current U.S. 12 fl oz Celsius Originals label. Celsius Essentials, Hydration, and Vibe lines differ — see the product comparison below.

Celsius went from a gym-bag niche brand to the third-biggest energy drink in America by selling itself as the “fitness” alternative to Monster and Red Bull: no sugar, no artificial colors, no preservatives, seven vitamins, and a “MetaPlus” blend that supposedly makes you burn calories. The can is cleaner than most of its competitors. It’s also carrying 200 mg of caffeine, a proprietary blend that hides its doses, a sweetener you should know about, and a “no preservatives” claim that cost the company a $7.8 million settlement. Here’s all the Celsius ingredients, what it does, and what the marketing leaves out.

Quick answer: what’s in Celsius?

The full Celsius ingredients list

Two things stand out on this label before you even get to the individual ingredients.

The blend is “proprietary.” That means Celsius only has to disclose the total weight (1.81 g) and list the ingredients in descending order — not how much of each. Taurine is listed first, so it’s the largest component, and caffeine is third. Beyond that, you can’t know whether you’re getting a meaningful dose of green tea extract or a sprinkle for the label. The caffeine is the exception: FDA rules require the total to be stated, and Celsius prints 200 mg.

That parenthetical about citric acid — “added for flavor; not used as a preservative” — is legal language. Celsius marketed its drinks as having “no preservatives” for years while listing citric acid, which is a recognized preservative. A 2022 class-action lawsuit ended in a $7.8 million settlement, Celsius changed the wording, and the odd clause on the can is the result.

Celsius ingredients explained

Caffeine (as caffeine anhydrous) 200 mg — high

The ingredient that matters most. 200 mg per 12 oz can is the same as a 16 oz Monster and two and a half Red Bulls, in a smaller container. The FDA considers up to 400 mg a day safe for healthy adults, so one can is half your daily budget, and two cans plus a coffee puts you over. Caffeine anhydrous is simply dehydrated caffeine powder — synthetic or extracted, chemically identical to what’s in coffee, but absorbed fast because there’s nothing else in the drink to slow it down.

Who should be careful: anyone under 18 (the American Academy of Pediatrics advises against energy drinks for kids and teens entirely), pregnant women (200 mg is the common daily ceiling, so one can is the whole allowance), people with heart rhythm issues or anxiety, and anyone who metabolizes caffeine slowly. The can itself says “not recommended for people who are caffeine sensitive, children under 18, or women pregnant or nursing.”

Note that Celsius Essentials (16 oz cans) has 270 mg, and Celsius Hydration has none. The “Celsius” name alone doesn’t tell you the dose.

Guarana extract (seed) More caffeine

Guarana is a Brazilian seed that contains caffeine — by weight, two to four times as much as coffee beans — plus small amounts of theobromine and theophylline, the stimulants in chocolate and tea. Celsius’s “200 mg total caffeine” includes the guarana contribution, so it isn’t extra on top. The practical effect is that guarana’s caffeine is bound to tannins and releases more slowly, which is why many people describe Celsius energy as “smoother.” It’s a real ingredient, but it’s still caffeine wearing a plant name.

Taurine Standard energy-drink ingredient

An amino acid your body makes on its own, concentrated in muscle, heart, and brain tissue. It’s in Red Bull, Monster, and nearly every energy drink. Taurine has decent evidence for modest benefits in exercise performance and it’s not a stimulant despite the “bull” association. Since it’s first in the proprietary blend, it’s the largest single component — probably in the 1,000 mg range, though Celsius doesn’t say. Considered safe at typical doses.

Glucuronolactone Marketing ingredient

A naturally occurring compound involved in detoxification pathways, added to energy drinks since the Red Bull era on the theory that it fights fatigue. The human evidence for any effect at drink doses is close to nonexistent. Not harmful; just there because every energy drink has it.

Ginger extract (root) Fine

Ginger has real evidence for easing nausea and mild anti-inflammatory effects, but the amount here is unknown and likely small. It’s mostly for flavor and for the “natural” feel on the label. No concerns.

Green tea leaf extract (15% EGCG) Dose unknown

This is the ingredient behind Celsius’s “thermogenesis” claim. EGCG, the main catechin in green tea, has modest evidence for increasing calorie burn, mainly when combined with caffeine. The catch is dose: studies showing an effect typically used 300–900 mg of catechins, and since green tea extract is last in a 1.81 g blend that also has to fit ~1 g of taurine and 200 mg of caffeine, the amount in a Celsius is probably well below that. One more thing worth knowing: concentrated green tea extract is the supplement ingredient most often linked to liver injury in case reports. The doses involved were far higher than anything in a can of Celsius, but it’s the reason not to stack Celsius with green tea extract pills.

Citric acid Low concern

Tartness, pH control, and — despite the label’s insistence — some preservative effect. Same molecule as in citrus fruit, commercially made by fermentation. The main downside of any acidic energy drink is dental erosion with frequent sipping.

Sucralose Flagged

Celsius’s only sweetener, and the reason it can be sweet with 10 calories. Sucralose is FDA-approved and widely used, but research since 2022 has found it can increase hunger signaling in the brain, alter gut bacteria at higher doses, and affect glucose tolerance in some people — which is a little ironic for a drink marketed on weight management. Our sucralose breakdown covers the research in detail. If you’re avoiding artificial sweeteners, Celsius is out; it doesn’t offer a stevia version.

Natural flavor Unknown blend

Proprietary flavor compounds from natural sources. You can’t know what’s in it.

Beta carotene / fruit and vegetable juice (color) No synthetic dyes

A legitimate point in Celsius’s favor. Monster, Rockstar, and most energy drinks use Red 40, Blue 1, or Yellow 5; Celsius colors with beta carotene (orange flavors) or vegetable juice (berry flavors). No This Red 40 Post anywhere in the lineup.

Vitamin C, B vitamins, biotin, chromium Marketing doses

The “7 essential vitamins.” Per can: 60 mg vitamin C (67% DV), riboflavin, niacin, B6 and B12 at 100–250% DV, biotin at 100%, pantothenic acid at 100%, and chromium at 50 mcg (143% DV). B vitamins are water-soluble, so excess is excreted, which is why brands can mega-dose them for the label; they “support energy metabolism” in the sense your body needs them, not in the sense that extra ones make you feel energized. Chromium is included because of weak evidence it blunts carb cravings. None of this is harmful. None of it is why you feel the drink.

Celsius nutrition facts

Does Celsius actually burn calories?

The can says “burns up to 100 calories and more per can” with moderate exercise. This comes from a handful of small studies, mostly funded by Celsius and run at the University of Oklahoma around 2009–2010, which found that drinking Celsius before exercise raised energy expenditure modestly compared to placebo. The effect was real but small, it was measured over a few hours, and it’s consistent with what 200 mg of caffeine plus green tea extract does in any form — coffee produces a similar bump.

Three things to keep in mind. First, “up to 100 calories” is a rounding error against a 2,000-calorie day. Second, the fine print on every can concedes that “Celsius alone does not produce weight loss in the absence of a healthy diet and moderate exercise.” Third, the sweetener research cuts the other way: if sucralose increases appetite, a drink that burns 100 calories and makes you eat 150 more isn’t a weight-loss tool. Treat Celsius as a clean-ish caffeine delivery system, not a fat burner.

Celsius vs. Monster vs. Red Bull vs. coffee

Against sugared Monster and Red Bull, Celsius wins on nearly every line: no sugar, no dyes, fewer additives. Against Monster Zero Ultra or Red Bull Sugarfree, the gap narrows — those also use sucralose and Ace-K, and Celsius still has more caffeine per ounce than either. Against black coffee, Celsius loses: coffee has no sweetener, no proprietary blend, and comparable caffeine for pennies. See our Monster and Red Bull breakdowns for the two it’s most often compared against.

Which Celsius is which?

Is Celsius bad for you?

The specific things to weigh:

1. Caffeine load. The single most important fact about Celsius. Track your total; the can is half the adult daily guideline on its own.
2. Proprietary blend. You can’t know the green tea extract or taurine doses. That’s a transparency problem, not a safety one.
3. Sucralose. Fine occasionally; worth reconsidering if you’re drinking several a day, especially for weight goals.
4. Athletes. Celsius dropped the NCAA warning from its cans after a 2023 lawsuit, but guarana, taurine, and high-dose caffeine can still trip collegiate testing thresholds. If you’re tested, check your program’s list rather than the can.
5. Acidity. Like every sparkling citrus drink, it’s hard on tooth enamel if sipped all day.

Cleaner alternatives

If you want the caffeine without the blend and sweetener: black coffee or cold brew, unsweetened green tea (real EGCG at a known dose), or a caffeine tablet with water for pure dosing. If you want a canned energy drink with fewer question marks, look for ones that disclose every dose and use stevia or monk fruit — they exist, though they’re pricier and harder to find. If you just like Celsius, the honest move is to count it as your coffee, not as a health drink.

See the Full Ingredients Index for every drink we’ve broken down.

This article is for informational purposes and is not medical advice. Talk to a doctor or registered dietitian about your individual nutrition needs.