“Sweetened with monk fruit.”
It sounds like a very simple ingredient story.
But here's something most people don't realise:
Monk fruit extract isn't one standardised ingredient.
There can be a huge difference between one monk fruit extract and another — from the amount of sweet compounds it contains, to how extensively it has been purified, to what else remains in the extract.
And if you're choosing a protein powder because it says “monk fruit sweetened”, you probably aren't being given enough information to know what you're actually getting.
This isn't an article about telling you monk fruit is “bad”. Monk fruit is a real fruit, and monk fruit extract is an approved food ingredient in New Zealand and Australia. The interesting question is its quality.
Because when an ingredient becomes popular, the market doesn't automatically become consistent. And that's where things get messy.
Why you can trust us:
- We don't use monk fruit in our protein blends.
- We don't use stevia, thaumatin or natural flavours either.
- We believe ingredients should be recognisable and purposeful.
- We make our protein blends from real food ingredients rather than relying on highly concentrated sweetening systems.
- And when we're sourcing ingredients, we care about what's actually in them — not just what's written on the front of a bag.
How much monk fruit is in your monk fruit sweetener?
What is monk fruit extract?
Monk fruit — Siraitia grosvenorii, also known as luo han guo — contains naturally occurring compounds called mogrosides.
These are responsible for much of its intense sweetness.
But when you buy “monk fruit sweetener”, you're generally not buying powdered fruit.
You're buying an extract.
The fruit is processed and the sweet compounds are extracted and concentrated. Depending on how that extraction and purification is carried out, the resulting extract can contain very different proportions of mogrosides and other compounds.
That's why “monk fruit extract” is really a category rather than a single uniform ingredient.
And this is where the purity conversation begins.
Monk fruit isn't just “monk fruit”
Imagine two brands both using:
Monk Fruit Extract
On paper, they sound identical.
But one might be a relatively lower-purity extract containing around 25% Mogroside V.
Another might be standardised around 50–55% Mogroside V.
Those are not interchangeable ingredients.
EFSA's assessment of monk fruit extracts specifically describes commercial extracts at different Mogroside V concentrations, including approximately 25%, 40%, 45%, 50% and 55%. The composition of other mogrosides and other compounds also varies between these extracts.
So when a product simply tells you: “Sweetened with monk fruit” you still don't know the grade of monk fruit extract being used.
Why purity matters
This is where the word “purity” needs a little unpacking.
Higher-purity monk fruit extracts generally involve additional processing to concentrate the desired sweet compounds and remove more of the other material from the original fruit extract.
That can mean more extraction, filtration, separation and purification steps.
And those processes aren't free.
More processing generally means a more expensive ingredient.
Think about it like this.
- You start with the fruit.
- You extract the soluble components.
- You then want to isolate and concentrate the compounds you're actually interested in.
- The more you refine that material, the more you are paying for processing, equipment, energy, quality control and yield.
So there can be a very real difference between:
“We use monk fruit.”
and
“We use a highly purified, highly standardised monk fruit extract.”
Yet both can simply appear on the consumer-facing ingredient list as:
Monk fruit extract.
Here's the part consumers don't see
This is probably the most important section of this entire article.
You are unlikely to see the purity specification on the back of your protein powder.
You may see: Monk fruit extract
But you probably won't see:
Monk fruit extract — 50% Mogroside V or Monk fruit extract — 25% Mogroside V
Those are part of the B2B ingredient supply chain, not usually the retail label.
And this is where the transparency gap appears.
Here are some basic Google search result screenshots about Monk fruit extract (no fillers) availability and its price range.
What to look for when buying protein powder
We're not suggesting you stop buying products containing monk fruit.
That's your choice.
But next time you see: “Sweetened with monk fruit” you could ask a slightly better question.
1. What does the ingredient list actually say?
Is it simply Monk fruit extract? Or does the brand provide more information?
2. Does the brand disclose the Mogroside V level?
If they do, you've been given more information than the standard ingredient declaration provides.
3. Does the brand talk about ingredient specifications?
A transparent brand should be able to explain what it means by the ingredient they're using.
4. Is there a carrier?
Some concentrated sweetener ingredients may be supplied with carriers or other formulation aids.
5. What else is in the product?
Don't let “monk fruit” become a shortcut for judging the entire formulation. Read the whole ingredient list. Natural Flavours is a whole another topic!
Conclusion
The conversation around monk fruit has become strangely simple:
Monk fruit = natural = good.
But food ingredients rarely work that neatly.
Monk fruit extract is a processed, concentrated ingredient.
Its composition can vary.
Its Mogroside V concentration can vary.
Its purification can vary.
And the cost of the ingredient can vary accordingly.
The problem is that you probably won't see any of that on the back of the protein powder.
You'll see:
Monk fruit extract.
The brand, meanwhile, can know exactly what grade it purchased.
They can know its specification.
They can know its Mogroside V level.
And they know what they paid for it.
You don't necessarily get to see any of that.
That's why we think “monk fruit sweetened” deserves a little more scrutiny — not because monk fruit is dangerous, but because two products can use the same words while using very different versions of the ingredient.
At Smoothery, we decided not to play that game.
We don't use monk fruit.
We use real food.
Two ingredients.
No mystery sweetener specification.
No need to decode what “monk fruit extract” means.
Just read the bag. It's all there.
