An artificial sweetener is a lab-made, zero-calorie compound. Sucralose, acesulfame potassium, and aspartame are the three that show up in protein powder, and the only reliable way to know if one is in your bag is to read the ingredient panel, because "sugar-free" on the front says nothing about which sweetener did the work. We built NØRSE CØDE with monk fruit extract and allulose instead of any of the three. Here's what to actually check on any bag, and why some people go looking for this in the first place.
Three names cover almost every artificially sweetened protein powder: sucralose (sold as Splenda), acesulfame potassium (Ace-K, Sunett, sometimes "Sweet One"), and aspartame (Equal, NutraSweet). All three are zero-calorie, all three are many times sweeter than sugar by weight, and all three are FDA-approved with a defined acceptable daily intake. Stevia and monk fruit are a different category entirely. They come from a plant and don't carry the same regulatory or research profile, so a bag can honestly say "plant-based sweetener" and still contain sucralose in the same blend. Stevia has its own well-documented aftertaste issue, covered in our guide to why a genuinely stevia-free formula is so hard to find.
Sucralose and acesulfame potassium are frequently used together in the same formula, so finding one on the label is a reason to look harder for the other. They're often listed side by side. Read past the front of the bag. The ingredient panel is the only place that tells the truth, because "no added sugar" and "sugar-free" both describe the absence of sugar, not the presence or absence of an artificial sweetener. If none of the three names above appear anywhere on the panel, the powder is genuinely free of them rather than only marketed as such.
Try It Yourself
Taste is part of it. Sucralose and acesulfame potassium both carry a distinct aftertaste some people notice immediately. But the bigger reason is what the research has started to say. In May 2023 the World Health Organization reviewed the evidence on non-sugar sweeteners and recommended against using them for weight control, citing potential long-term associations with increased risk of type 2 diabetes and cardiovascular disease. That same year, the International Agency for Research on Cancer classified aspartame as "possibly carcinogenic to humans" (Group 2B), a limited-evidence classification based on findings for liver cancer, not a conclusion that normal intake is dangerous, but enough for a lot of people to start reading labels differently. Separately, lab research has found that sucralose can measurably shift gut bacteria populations in some studies, though findings across the research are mixed and dose dependent. None of this makes an occasional diet soda dangerous. It's a real, citable reason someone would rather their daily protein shake wasn't where they get exposed to it.
NØRSE CØDE is sweetened with allulose and monk fruit extract. About 70% of allulose is absorbed directly in the small intestine, and what's left mostly resists fermentation by gut bacteria, unlike sugar alcohols such as erythritol and xylitol. A 2022 sensory study found monk fruit's main sweet compound produces significantly less bitterness and metallic aftertaste than stevia's. Both cost more to formulate with than reaching for sucralose or acesulfame potassium, and that's the real reason so few brands make the switch. The cheap sweeteners work, taste aside, and swapping them out doesn't show up as a headline claim the way "20g protein" does. We made the switch anyway, and kept the label to about ten ingredients you'd recognize: no artificial sweeteners, no gums, no fillers, made in our own facility in Petaluma, California, and third-party tested for heavy metals.
Run this on any bag, ours included:
Twenty grams of protein per serving, about ten ingredients total, sweetened with allulose and monk fruit extract instead of sucralose, acesulfame potassium, or aspartame, plus prebiotic fiber from acacia. It wets evenly in one stir, hot or cold, in any liquid, no blender and no recipe needed. We make it ourselves in our own facility in Petaluma, California, and third-party test every batch for heavy metals.
Backed by a 60-day money-back guarantee, no questions asked, and it ships same day when you order by noon PT.
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