F3 Pure vs Zevia, Celsius, and Bloom: clean energy drinks compared.
F3 Pure is the only one of the four sweetened with real cane sugar, monk fruit, and stevia instead of an artificial sweetener or a zero-calorie stevia-only formula, so if you want a clean-sweetened energy drink with a functional stack (not just caffeine), Pure is the pick.
Side-by-side.
| F3 Pure | Zevia Energy | Celsius | Bloom Sparkling Energy | |
|---|---|---|---|---|
| Caffeine | 120 mg (green tea) | 120 mg (tea) | ~200 mg | ~180 mg |
| Sweetener | Cane sugar, monk fruit, stevia (Reb M) | Stevia leaf extract only | Sucralose | Sucralose |
| Artificial sweeteners | No | No | Yes | Yes |
| Calories | 20 | 0 | 10 | 10 |
| Functional stack | L-theanine, BCAAs, ginkgo biloba | None | Guarana, green tea extract, ginseng, B vitamins | Taurine, L-theanine, panax ginseng |
Competitor figures reflect publicly listed nutrition facts and ingredient panels as of this writing and can change if a brand reformulates.
F3 Pure vs Zevia Energy.
Both run a real, tea-derived 120 mg of caffeine, and neither uses an artificial sweetener, so this is the closest matchup on the list. The difference is what else is in the can. Zevia Energy is stevia-sweetened and zero calorie with no added functional ingredients beyond caffeine. F3 Pure trades that zero-calorie profile for 20 calories and 5 g of organic cane sugar, in exchange for a functional stack (L-theanine, BCAAs, ginkgo biloba) built on the same platform as F3 Energy. Choose Zevia if zero calories is the priority; choose Pure if you want a clean-sweetened drink that also does something beyond caffeine.
F3 Pure vs Celsius.
F3 Pure is the cleaner-sweetener alternative to Celsius. Celsius is sweetened with sucralose and runs a higher caffeine dose, around 200 mg per can. F3 Pure uses cane sugar, monk fruit, and stevia with no artificial sweeteners, at 120 mg of caffeine. If the reason you are looking to switch from Celsius is artificial sweeteners, Pure is the direct swap.
F3 Pure vs Bloom Sparkling Energy.
Bloom Sparkling Energy is also sucralose-sweetened, at around 180 mg of caffeine per can, and it includes taurine, L-theanine, and panax ginseng. F3 Pure runs a lower, 120 mg caffeine dose with its own functional stack (L-theanine, BCAAs, ginkgo biloba) and, again, no artificial sweeteners. Bloom Nutrition is also known for its greens powders; the comparison here is specifically the Bloom Sparkling Energy can.
The short version.
If avoiding artificial sweeteners is the goal, F3 Pure and Zevia Energy are the two real options here, and Pure is the one with a functional stack layered on top of its clean-sweetened base. Celsius and Bloom both lean on sucralose to hit their low-calorie targets. For reference on caffeine intake, the FDA cites 400 mg per day as a level not generally associated with negative effects for healthy adults, and the Dietary Guidelines for Americans cover added-sugar intake if you are weighing Pure's 5 g against a zero-sugar option.
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