Celsius vs Monster: Caffeine, Sweeteners and Sodium

Celsius vs Monster: Caffeine, Sweeteners and Sodium

A 12 oz Celsius Original has 200 mg caffeine, 10 calories and zero sugar. A 16 oz Monster Original has 160 mg caffeine, 230 calories and 54 g of added sugar. Monster Zero Ultra splits the difference: 150 mg, 10 calories, zero sugar. Celsius is stronger per can and per ounce. But once you drop the sugared Monster, the "healthier" question gets more interesting than the internet makes it sound.

Key Takeaways

• Celsius packs more caffeine into a smaller can. 200 mg in 12 oz (16.7 mg/fl oz) vs Monster's 160 mg in 16 oz (10.0 mg/fl oz), roughly 67% more concentrated.
• The sugar gap only applies to Monster Original. Zero Ultra and Celsius Original are both zero-sugar, 10 calories. The real differences: caffeine dose, sweetener systems and sodium.
• Monster Zero Ultra has 76x the sodium of Celsius Original. 380 mg vs 5 mg, plus three sweeteners vs one.
• Neither is "healthy." The better pick depends on how much caffeine you tolerate, which sweeteners you prefer and whether sodium matters to you.

Side-by-Side Label Comparison

All figures from manufacturer labels and product pages, checked October 2026. Caffeine for Monster sizes other than 16 oz is not published by the brand.

Prices from Amazon on October 7, 2026. They change frequently; Celsius was on sale at $1.58/can during Prime Big Deal Days.

Is Celsius Stronger Than Monster?

Yes, by both measures that matter. A 12 oz Celsius Original delivers 200 mg of caffeine. A 16 oz Monster Original delivers 160 mg. That is 40 mg more caffeine in 4 fewer ounces of liquid.

The concentration gap is even wider. Celsius runs 16.7 mg per fluid ounce; Monster runs 10.0 mg per fluid ounce. For context, the FDA has cited 400 mg a day as an amount not generally associated with negative effects for most healthy adults. Both cans sit well under that in a single serving.

For a true 16 oz vs 16 oz comparison, look at Celsius Essentials: 270 mg vs Monster's 160 mg. Essentials carries a printed warning: "DO NOT EXCEED (1) SERVING PER DAY."

Quick math against the FDA's 400 mg daily reference for most healthy adults: two Celsius Originals hit 400 mg exactly. One Essentials plus one Monster totals 430 mg, past the line. For more head-to-heads, see how Monster compares with Red Bull ounce for ounce or Celsius vs Red Bull.

Celsius vs Monster Zero: Which Is Healthier?

This is the comparison most people actually need. Once you drop Monster Original and its 54 g of sugar, the two zero-sugar options look closer than the marketing suggests.

What they share: Zero sugar, 10 calories per can and B vitamins at several hundred percent of daily value.

Where they split:

• Caffeine: 200 mg (Celsius) vs 150 mg (Zero Ultra). A 33% gap that some people feel and others do not.
• Sweeteners: Celsius uses sucralose only. Zero Ultra uses three: erythritol, sucralose and acesulfame potassium. Whether one system is "better" depends on your gut and your preferences. For a deeper look, see sucralose vs stevia.
• Sodium: 5 mg (Celsius) vs 380 mg (Zero Ultra), which is 16% of the daily value in a single can. Two Zero Ultras and you have consumed a third of your daily sodium from energy drinks alone.
• Carbohydrates: 0 g (Celsius) vs 6 g (Zero Ultra), from erythritol. Erythritol is a sugar alcohol that contributes minimal calories but appears on the carb line.
• Extras: Celsius lists green tea extract, ginger root extract, chromium (140% DV) and biotin (1,000% DV). Zero Ultra lists taurine, panax ginseng flavor (not extract), L-carnitine and inositol.

No blanket winner. Less sodium and fewer sweetener types? Celsius. Lower caffeine and the white can's flavor? Monster. For an honest Celsius ingredient breakdown or a look at whether Monster is bad for you, we covered each separately.

Monster Original vs Celsius: The Sugar Gap

This one is not close. A 16 oz Monster Original contains 54 g of added sugar, which the label itself marks as 108% of the daily value. The American Heart Association recommends no more than 36 g of added sugar per day for men and 25 g for women. One Monster Original delivers 150% of the men's limit and 216% of the women's limit before you eat a single other thing.

Celsius Original has zero sugar and zero grams of total carbohydrate.

The sugared Monster also lists sucralose in its ingredients, alongside 54 g of actual sugar. So if avoiding artificial sweeteners is your goal, regular Monster does not accomplish that either.

Does Celsius Burn Fat? What the Can Says

Celsius markets its green tea extract (EGCG) and chromium as metabolism and hunger-related ingredients. The can itself carries a disclaimer: "CELSIUS alone does not produce weight loss in the absence of a healthy diet and moderate exercise." This comparison cannot confirm those brand claims. If you want a longer breakdown, see does Celsius actually burn fat.

Celsius vs Monster: Price Per Can

Amazon prices checked October 7, 2026 (Prime Big Deal Days sale was live; prices move):

Celsius does not sell cans on celsius.com; its "Buy Now" button routes to retailers. Monster per-can is cheaper, but Celsius delivers more caffeine per dollar at list price.

If You Want Less Than Either Can

If 150 to 270 mg feels like too much for a Tuesday afternoon, the question shifts from "which can" to "how much caffeine, delivered how."

For more options at the lower end, see energy drinks at 100 mg or less. And for another Celsius matchup, we compared Alani vs Celsius, label by label.

Celsius or Monster: Which Should You Buy?

If you are still drinking sugared Monster, the switch to any zero-sugar option (Celsius, Zero Ultra or Monster Zero Sugar at 160 mg) eliminates 54 g of added sugar per can. That is the clearest upgrade on this page.

After that, the choice between Celsius and Zero Ultra comes down to three things: how much caffeine you tolerate, how you feel about one sweetener vs three, and whether 380 mg of sodium per can bothers you. Celsius is the stronger, lower-sodium option. Zero Ultra is the lighter dose in a bigger can. Neither is a health food.

Frequently Asked Questions

Is Celsius healthier than Monster?

Celsius Original has zero sugar, 5 mg sodium and 10 calories vs Monster Original's 54 g sugar, 370 mg sodium and 230 calories. Against Monster Zero Ultra, the calorie and sugar gap disappears, and the comparison shifts to caffeine strength (200 vs 150 mg), sweetener count (one vs three) and sodium (5 vs 380 mg). "Healthier" depends on which of those variables you care about most.

Does Celsius or Monster have more caffeine?

Celsius has more. A 12 oz Celsius Original has 200 mg. A 16 oz Monster Original has 160 mg. A 16 oz Monster Zero Ultra has 150 mg. Celsius Essentials (16 oz) has the most at 270 mg with a one-a-day label warning.

Is Celsius stronger than Monster Zero Ultra?

Yes. Celsius Original delivers 200 mg in 12 oz (16.7 mg/fl oz). Monster Zero Ultra delivers 150 mg in 16 oz (9.4 mg/fl oz). That makes Celsius nearly 78% more concentrated per ounce and 33% higher in total caffeine per can.

What sweeteners are in Celsius and Monster Zero Ultra?

Celsius Original uses sucralose. Monster Zero Ultra uses erythritol, sucralose and acesulfame potassium. Both are zero sugar. The sugared Monster Original also contains sucralose alongside its 54 g of sugar.

Can you drink a Celsius and a Monster in the same day?

One Celsius Original (200 mg) plus one Monster Original (160 mg) totals 360 mg, under the FDA's 400 mg daily reference for most healthy adults. One Celsius Essentials (270 mg) plus one Monster (160 mg) totals 430 mg, which exceeds it. Count all caffeine sources, including coffee and tea.

Who should not drink Celsius or Monster?

Both labels say their products are not recommended for children, people sensitive to caffeine, or women who are pregnant or nursing. Celsius Essentials adds a "DO NOT EXCEED (1) SERVING PER DAY" warning. If you have a medical condition or take medication, talk to your clinician before adding a high-caffeine drink.

200 mg in One Go, or 80 mg That Lasts

Even Monster Zero Ultra, the "lighter" option on this page, delivers 150 mg in one pour. If any of those doses lands too hard, the fix is not a weaker can. It is a smaller dose designed to clear more slowly.

Roon is 80 mg of caffeine paired with 60 mg L-theanine, 25 mg methylliberine (Dynamine) and 5 mg theacrine (TeaCrine) in a zero-nicotine sublingual pouch. Zero sugar, zero calories; it does contain sucralose. Methylliberine is there for duration: in a randomized, double-blind crossover PK study (n=12), co-administration of 100 mg methylliberine with 150 mg caffeine cut caffeine's oral clearance from 41.9 to 17.1 L/hr and extended its half-life from 7.2 to 15 hours, with no increase in peak concentration. Those doses are about 4x and 1.9x what Roon contains, so the mechanism's direction applies but the exact magnitudes do not. The practical result: a 6 to 8 hour felt window from 80 mg, no crash. The tradeoff: stop at least 8 hours before bed.

From $9.16 per tin ($0.61/pouch) on a 12-tin subscription, or $15.00 per tin one-time. If the cans on this page feel like more stimulant than you need, try Roon.

Related from Roon

• Celsius vs Red Bull
• Red Bull vs Monster
• Caffeine in every Monster line
• Best low-caffeine energy drinks

Written by Roon Team