Short answer: Choose Bloom if you want a lighter caffeine hit, a gentler feel and a “wellness” angle. Choose Celsius if you want more caffeine and a stronger kick for workouts. Neither is a health drink, and the differences are smaller and more specific than the marketing suggests.
Quick comparison
| Bloom Sparkling Energy | Celsius Sparkling Energy | |
|---|---|---|
| Caffeine (12 oz) | 180 mg | 200 mg |
| Caffeine per fl oz | ~15 mg | ~16.7 mg |
| Calories | 10 per can, 0 g sugar | Near zero, 0 g sugar |
| Caffeine source | Green coffee bean extract | Green tea extract and guarana |
| Sweetener | Sucralose | Sucralose |
| Signature blend | Prebiotic fiber, L-theanine, lychee, ginseng, green tea, ACV, B vitamins | “MetaPlus” blend: taurine, guarana, glucuronolactone, ginger, green tea (EGCG) |
| Pitch | Focus, gut and mood | Metabolism and workouts |
| Typical price | About $2.48 a can at one major retailer | About $3.99 a can at a liquor and convenience store Bloom Sparkling Energy +8 |
Prices vary a lot by store and pack size, so treat them as a snapshot.
The caffeine gap is smaller than it looks
Many comparisons treat 180 mg vs 200 mg as “mild vs strong.” It’s a 20 mg difference, about a fifth of a cup of coffee.
Here is how that plays out against the FDA’s figure for the daily amount generally not associated with negative effects in healthy adults, which is 400 mg: baristalife
- Bloom: 180 mg per can, so a second can gets you to 360 mg.
- Celsius: 200 mg per can, so a second can lands exactly at 400 mg.
Either way, two cans is the ceiling for the day, and that’s before your morning coffee, tea or pre-workout. The most common mistake with both drinks is stacking caffeine sources without adding them up.
The real difference is the ingredient mix, not the milligrams.
What’s different inside the can
Bloom: caffeine plus a “calming” stack
Bloom’s pitch is that it pairs caffeine with ingredients like prebiotic fiber, taurine, L-theanine, Asian ginseng root extract, lychee fruit extract, green tea leaf extract, apple cider vinegar, and B vitamins. adamkempfitness
The most defensible piece is L-theanine alongside caffeine. Research on the pairing, often cited as Owen et al., 2008, suggests it can support attention while softening the edgy feeling of caffeine. That is a plausible reason some caffeine-sensitive people say Bloom feels smoother. One Walmart reviewer, who is caffeine-sensitive, says it doesn’t leave them jittery. That is an anecdote, not a trial. adamkempfitnesswalmart
Celsius: the thermogenic and performance angle
Celsius builds around its MetaPlus blend: taurine, guarana seed extract, caffeine anhydrous, glucuronolactone, ginger root extract and green tea leaf extract standardized to 15% EGCG. It also adds B vitamins and vitamin C. ubereats
Part of its caffeine comes from guarana and green tea, but the label also lists caffeine anhydrous, a purified form. So “natural caffeine” is only partly true. Ingredients like caffeine and green tea extract may temporarily increase metabolic rate, but that is not the same as a meaningful fat-loss effect. Celsius’s own label says the drink alone does not produce weight loss without a healthy diet and moderate exercise. waterdropfilterubereats
The transparency problem both brands share
Both brands put their best-sounding ingredients on the front of the can without always showing how much of them you get.
- Bloom: Only caffeine and the B vitamins have printed amounts. A “gut health” claim is hard to verify without a fiber dose. Reviewers also note it is not third-party tested. takeroongaragegymreviews
- Celsius: Its key actives sit inside a proprietary blend, so the label doesn’t show exact amounts for each ingredient.
If dosage transparency matters to you, neither brand fully delivers.
Sweeteners, stomach comfort and side effects
- Both use sucralose. If you avoid artificial sweeteners, neither is for you. Bloom is often framed as the “cleaner” option, but on sweeteners the two are the same.
- Bloom’s gut ingredients can have a catch. One reviewer notes that prebiotics and ACV can have a mild laxative effect, especially for people new to them. adamkempfitness
- Celsius’s higher dose makes jitters, a racing heart or sleep trouble slightly more likely in caffeine-sensitive people. Most reported side effects of either drink are standard caffeine effects at this dose. takeroon
Which one should you pick?
Pick Bloom if you:
- Want a bit less caffeine per can
- Are somewhat caffeine-sensitive and want the L-theanine pairing
- Prefer a lighter, more “everyday” drink
- Look for a lower price per can
Pick Celsius if you:
- Want a stronger pre-workout or midday push
- Like taurine and guarana-style formulas
- Prefer the established fitness-oriented brand and wide flavor range
Skip both, or ask a doctor first, if you:
- Are pregnant or breastfeeding
- Have a heart condition, anxiety or sleep problems
- Already get most of your 400 mg from coffee
Common questions
Is Bloom or Celsius healthier?
Neither clearly wins. Both are sugar-free and low calorie, and both are caffeine delivery systems with some added extras. The extra ingredients are less proven than the caffeine.
Which has more caffeine?
Celsius, at 200 mg against Bloom’s 180 mg.
Will either help me lose weight?
Not on its own. The caffeine can give a small, temporary metabolic bump, but the results come from diet, activity and sleep.
Can I drink one every day?
For most healthy adults, one can fits within the 400 mg guideline if you count your other caffeine. Individual tolerance varies.
Bottom line
On paper the two are close: about 10% more caffeine in Celsius, and a different cast of supporting ingredients. Bloom leans calm-focus and gut-friendly, while Celsius leans workout energy. The best way to choose is to add up your total daily caffeine, check the label for sweeteners you avoid, and notice how each makes you feel.
Label details and prices change by flavor, region and retailer, so check the can in your hand before relying on any figure here.