Why can't you buy pure monk fruit extract in the UK?

05 October 2026

A pouch of Zilch monk fruit natural sweetener powder

You find a US recipe that calls for a few drops of monk fruit extract, go looking for it in a UK shop, and come back with either a monk fruit powder or a bag that is mostly erythritol. That is not bad luck with stockists. Purified monk fruit extract is not authorised as a sweetener in the UK or the EU, so it is not legally sold here as a food. What you can buy is monk fruit in its traditional form, a whole-fruit decoction, which regulators cleared in 2024.

In plain terms

Purified monk fruit extract concentrates the fruit's sweet compounds, the mogrosides. In law, a sweetener like that is a food additive and needs authorisation before it can be sold.
EFSA assessed monk fruit extract in 2019 and said the data was not enough to confirm its safety. It has no E number, and the UK has not authorised it either.
Monk fruit decoctions, made by simmering the whole fruit in water, are a regular food in the UK and EU and can be sold freely.
Zilch is a decoction powder, not an extract. It is around 3x sweeter than sugar, far gentler than an extract.

What counts as a purified monk fruit extract?

Monk fruit gets its sweetness from a group of compounds called mogrosides, the main one being mogroside V. Fresh fruit contains well under 1% mogroside V. A purified extract processes the fruit until those compounds make up a large share of the powder, commonly around 50% mogroside V and sometimes more.

The result is intensely sweet and used in tiny amounts, which is why US recipes measure it in drops or pinches. We go into the chemistry in what is mogroside V?

A decoction is a different thing. It is a gentle water infusion of the whole dried fruit, the way monk fruit has been prepared in China for centuries. It keeps a broader mix of the fruit's naturally occurring compounds, including some of its natural sugars, and it is much less concentrated.

Why isn't the extract authorised here?

In the UK and EU, an ingredient used to make food taste sweet in place of sugar is regulated as a sweetener, which is a type of food additive. Additives need a positive safety assessment and a formal authorisation, usually with an E number, before they can be used.

Monk fruit extract went through that process in the EU. In 2019, the European Food Safety Authority (EFSA) assessed an extract containing 25 to 55% mogroside V and concluded that the toxicity data was insufficient to conclude on its safety as a food additive. Among other things, it said findings in one rat study could not be ruled out without further long-term studies.

Read that closely. EFSA did not say monk fruit extract is unsafe. It said the evidence put in front of it was not enough to say it is safe, which is the bar an additive has to clear. Without that, there is no authorisation, and nobody can sell it in the EU as a sweetener.

The UK has its own system since Brexit, run by the Food Standards Agency (FSA). Monk fruit extract does not appear on the UK registers of authorised food additives or novel foods, so the position here is the same.

So why is it everywhere in the US?

The US works differently. Ingredients can be used once they are "Generally Recognised as Safe" (GRAS), and in 2010 the FDA raised no questions about a GRAS notice for monk fruit extract. Since then it has turned up in drinks, tabletop sweeteners and a huge number of recipes and videos.

That is where most of the confusion comes from. American content assumes the extract is on every shelf, and UK readers reasonably expect to find it here too.

What you can buy instead

In 2024, UK and EU regulators confirmed that non-selective aqueous decoctions of monk fruit are not novel foods, because they were eaten here before 1997. That makes decoction powders a regular food ingredient you can buy and use freely. We cover how that ruling came about in is monk fruit legal in the UK and EU?

When you are comparing products on a UK shelf, the ingredients list tells you most of what you need:

Look at the first ingredient. Ingredients are listed by weight, so if erythritol (E968) comes first, the product is mostly erythritol with some monk fruit.
Look for the words decoction or infusion. They tell you it is the traditional whole-fruit form.
Check the carrier. Decoction powders are usually on a carrier to make them easy to measure. In Zilch it is soluble tapioca fibre.

Using a US recipe with a UK powder

Recipes written for extract use very small amounts, because the extract is so concentrated. A decoction powder is much gentler, so do not follow the extract quantity. Instead, work from the sugar the dish would normally need: start with about a third of that amount of Zilch, then taste and adjust.

Why choose Zilch?

We chose the decoction route on purpose. It is the form of monk fruit regulators in the UK and EU have actually cleared, it keeps more of the whole fruit than a purified extract, and it means we did not need erythritol to make the powder usable. Zilch is a monk fruit infusion powder (a gentle water infusion of the whole fruit, known technically as a decoction) with soluble tapioca fibre, around 3x sweeter than sugar. It is not the extract from the US recipe, and we think that is a good thing.

FAQ

Is monk fruit extract dangerous?

EFSA did not conclude that it is unsafe. It said the data was insufficient to confirm its safety as an additive, which is a different thing. In the US it has been used as a sweetener since 2010.

Will monk fruit extract be approved in the UK?

Only if someone applies with enough new safety data for the FSA to assess. We are not aware of a public application, so it is not likely to be on shelves soon.