THE SWEETENER DECISION
When we were formulating Fizzii, the sweetener was the first real decision point.
Not because it was the most complex part of the formula. But because it was the most revealing. Every sweetener choice tells you something about what a brand actually prioritizes.
Sucralose is cheaper than stevia. It's more intensely sweet. It masks flavor imperfections better. It's easier to work with at scale.
We chose stevia anyway.
WHAT IS STEVIA?
Stevia is a natural sweetener derived from the leaves of the Stevia rebaudiana plant — native to South America, used as a sweetener for centuries by indigenous Guaraní people.
The sweet compounds in stevia leaves are called steviol glycosides. The most common and best-studied are stevioside and rebaudioside A (Reb-A). Modern stevia extracts typically use Reb-A because it delivers clean sweetness with the least bitterness — a persistent criticism of earlier stevia formulations.
Key properties:
- ✦200–400x sweeter than sugar by weight
- ✦Zero glycemic index (does not raise blood sugar)
- ✦Zero calories
- ✦Heat stable
- ✦Derived entirely from a plant
- ✦No known toxicity at reasonable consumption levels
STEVIA VS. THE ALTERNATIVES
| Sweetener | Source | Glycemic Index | Research Concerns | Daily Use |
|---|---|---|---|---|
| Stevia (Reb-A) | Plant (Stevia leaf) | 0 | None significant | ✓ Recommended |
| Monk Fruit | Plant (Luo Han Guo) | 0 | None significant | ✓ Recommended |
| Sucralose | Synthetic (chlorinated sugar) | 0 | Gut microbiome, genotoxic byproduct | ⚠️ Question daily |
| Acesulfame-K | Synthetic | 0 | Outdated safety studies | ⚠️ Question daily |
| Aspartame | Synthetic | 0 | Headache sensitivity, ongoing review | ⚠️ Question daily |
| Sugar/Dextrose | Natural | 65–100 | High glycemic, adds sugar load | ✗ For daily hydration |
| Sugar Alcohols | Derived from plants | Low | Digestive discomfort at volume | ⚠️ Depends on amount |
The two clean options at the top of that table — stevia and monk fruit — are the only sweeteners we'd consider for a daily-use product.
We chose stevia over monk fruit for two reasons: formulation compatibility with our citrus and berry flavor profiles, and a longer track record of use in functional food products.
HOW WE USE IT IN FIZZII
Stevia has a reputation for bitterness. That reputation is earned — by products that use it incorrectly.
Stevia bitterness comes from using stevioside (the less refined glycoside) or from overusing the sweetener in formulas where the flavor profile doesn't support it.
In Fizzii, we use Reb-A — the cleanest, least bitter steviol glycoside — at a concentration calibrated to our specific flavor system. The citric and malic acids in our formula interact with stevia to create a bright, clean sweetness that reads as fruit-forward rather than herbal or bitter.
The result is a stevia-sweetened product that people who claim to hate stevia drink without noticing.
THE BOTTOM LINE ON SWEETENERS
For a product you're using every day — potentially for years — the sweetener choice matters more than it does for an occasional treat.
Daily consumption of synthetic sweeteners is a real exposure question that deserves real scrutiny. Not panic. Not avoidance of all sweeteners forever. But actual scrutiny.
Stevia is the choice we'd make for ourselves — and we do, every day.
It's the only sweetener in Fizzii. Not as a marketing claim. As a decision we'd make again.