Best sugar alternatives for diabetes: where monk fruit stands
Walk the baking aisle with diabetes in mind and the "sugar-free" labels start to blur together. The genuinely useful sugar alternatives are the ones that add sweetness without meaningfully raising blood glucose. Monk fruit and stevia sit at the top of that group, and among the sugar alcohols erythritol and xylitol have a low glycaemic impact too. So-called "natural" syrups such as honey, agave and coconut sugar are a different story: they are still forms of sugar and still raise blood glucose, so they are best limited. This is general information, not medical advice, so always take individual decisions with your own diabetes team.
Where things land
- Monk fruit and stevia have a negligible impact on blood glucose at the small amounts typically used.
- Erythritol and xylitol have a very low glycaemic impact, but come with digestive and other trade-offs.
- Honey, agave and coconut sugar are still "free sugars" and will raise blood glucose, so limit them.
- Many products sold as "monk fruit" are mostly erythritol, so read the label for hidden carbs.
What actually matters for blood sugar?
For someone managing diabetes, the key question about any sweetener is simple. Does it raise blood glucose, and by how much? Table sugar (sucrose) does, quickly. The alternatives split into two broad groups. Non-nutritive sweeteners such as monk fruit and stevia are intensely sweet, so you use tiny amounts and they contribute virtually no digestible carbohydrate. Sugar alcohols (polyols) such as erythritol and xylitol are bulkier and only partly absorbed, so they raise blood glucose far less than sugar, though rarely all the way to zero.
Diabetes UK, together with the British Dietetic Association and British Nutrition Foundation, sets out in its 2025 position statement that approved low- and no-calorie sweeteners are considered safe within established Acceptable Daily Intakes and can support diabetes and weight management when used in place of sugar. They are not a stand-alone fix, and they should sit within an overall healthy diet. That is the sensible frame for everything below. If you want the mechanics of how sweetness and glucose interact, our piece on Monk fruit and blood sugar goes deeper.
The sweeteners with negligible glycaemic impact
Monk fruit
Monk fruit gets its sweetness from mogrosides, plant compounds that are not absorbed through the usual carbohydrate pathways, so they largely pass through without being converted to glucose. In controlled feeding studies, monk fruit produced lower glucose and insulin responses than sucrose, without the sharp spike above baseline that sugar tends to cause. That is why it is a popular choice for people managing blood sugar. Monk fruit extract is recognised as Generally Recognised As Safe (GRAS) by the US FDA and is approved for use in the UK and EU.
One important caveat: not all "monk fruit" products are the same. Many are blends where erythritol or another bulking agent makes up the majority of the tub, with only a small amount of monk fruit for sweetness. If you are counting carbohydrate, that matters, so always read the ingredients and nutrition panel rather than trusting the front of the pack. We cover exactly what to look for in our guide to hidden ingredients in monk fruit products.
Stevia
Stevia is another leaf-derived, non-nutritive sweetener. Its steviol glycosides are far sweeter than sugar, so a tiny amount does the job, and it does not meaningfully raise blood glucose. The main complaint is taste. In its purer forms stevia can carry a liquorice-like or bitter aftertaste, which is why it is often blended with erythritol. If you want a head-to-head, our guide on Monk fruit vs stevia covers the differences.
Allulose (and why UK readers will not find it)
Allulose is a "rare sugar" found in small amounts in figs and raisins. It tastes and behaves like sugar in cooking but is barely metabolised, so it contributes almost no calories, and studies in people with type 2 diabetes have found it lowers the glucose rise after a meal. It is worth being clear about one thing, though. Allulose is not authorised for sale as a food ingredient in the UK or EU. It is treated as a novel food that has not cleared safety review, so you will not find it legitimately on UK shelves. It is on the Food Standards Agency register as awaiting authorisation rather than approved. So while allulose looks good on paper for blood sugar, it is not a realistic option here for now. Our Monk fruit vs allulose comparison has the fuller picture.
The sugar alcohols: low impact, with trade-offs
Erythritol
Erythritol is the sugar alcohol most often used to bulk out monk fruit and stevia blends, and it is an approved additive (E968) that is widely sold in the UK and EU. It has a very low glycaemic impact, and studies show it does not meaningfully raise blood glucose or insulin, which is why it became so common in "keto" and diabetic-friendly products. It is not without questions, though. A 2023 Cleveland Clinic study published in Nature Medicine, led by Dr Stanley Hazen and drawing on more than 4,000 participants, found that higher blood levels of erythritol were associated with roughly double the three-year risk of major cardiovascular events. This is observational and does not prove cause and effect, but it is enough that many people now prefer to keep erythritol modest. Larger amounts can also cause bloating or a laxative effect.
Best for: baking, where erythritol's bulk genuinely earns its place and helps a recipe behave. For everyday hot drinks we would reach for something else, since the cooling mouthfeel is hard to ignore in a cup of coffee. On blood sugar it does its job well; the open question is the cardiovascular data, which is why we treat "keep it modest" as reasonable rather than alarmist.
Xylitol
Xylitol is about as sweet as sugar with a low glycaemic index of around 7, and it is well known for being tooth-friendly. For blood sugar it is a reasonable option in moderation, but it causes digestive upset more readily than erythritol. It is also worth flagging for pet owners that xylitol is highly toxic to dogs, so it must be stored carefully.
What to limit: the "natural" sugars that still raise glucose
Honey, agave syrup, maple syrup and coconut sugar are frequently marketed as healthier, natural choices. For blood sugar management, treat them as sugar. NHS guidance classes honey as a "free sugar" that should make up no more than 5% of daily energy. Agave is very high in fructose, which loads the liver even though its immediate glucose response is lower. Coconut sugar has a somewhat lower glycaemic index than table sugar but is still sucrose at heart. None of these belong in the "negligible impact" group. They raise blood glucose and are best kept for occasional use.
Where monk fruit stands, and where Zilch fits in
For people managing blood sugar, monk fruit sits comfortably among the better options: sweetness with a negligible calorie and glycaemic impact at the small amounts typically used, no reliance on sugar alcohols, and a whole-fruit heritage. For many people what it leaves out matters as much as what it adds. If you have concerns about erythritol, choosing a monk fruit product that does not lean on it is a straightforward swap.
At Zilch, we came at this from a specific angle: we wanted clean sweetness without a sugar alcohol doing the heavy lifting. Erythritol solves the bulk problem, but it brings a cooling mouthfeel, the "is this really monk fruit?" label confusion, and digestive discomfort for some people. So Zilch is a monk fruit infusion powder made by gently decocting the whole fruit, carried on soluble tapioca fibre rather than a sugar alcohol. It is around three times sweeter than sugar, so you only need a little, which gives a negligible calorie and glycaemic impact at those small amounts. It has no added sugar, no erythritol, no sugar alcohols and no artificial additives, and it retains naturally occurring fibre and plant compounds from the fruit, including small amounts of naturally occurring sugars.
What it is not is a cup-for-cup baking sugar. Because it carries no erythritol, it does not add bulk or brown the way sugar does, so cakes usually need a recipe adjustment rather than a straight swap. That is the honest trade-off for leaving the sugar alcohols out. If erythritol is what put you off monk fruit blends before, it is worth a fresh look. As always, fit any change into your wider plan with your diabetes team.
Related reading
FAQ
Is monk fruit safe if I have type 2 diabetes?
Monk fruit is a non-nutritive sweetener that does not meaningfully raise blood glucose at the small amounts typically used, and it is approved for use in the UK. Most people managing type 2 diabetes use it without issue, but individual needs vary, so check with your diabetes team about your own plan.
Why do so many "monk fruit" products contain erythritol?
Monk fruit is intensely sweet, so on its own a tiny amount would be hard to measure. Manufacturers add a bulking agent, usually erythritol, to make it spoon like sugar. If you want to avoid sugar alcohols, look for a monk fruit product that uses a different carrier and read the ingredient list.
Can I bake with these sweeteners?
Yes, though behaviour differs. Intense sweeteners like monk fruit and stevia add sweetness but not bulk, so recipes may need adjusting. Our guide on how to use monk fruit covers the practical swaps.
Do sweeteners count towards my carbs?
Non-nutritive sweeteners like monk fruit and stevia contribute negligible digestible carbohydrate. Sugar alcohols and any bulking agents can add small amounts, so if you count carbohydrate, always read the nutrition panel of the specific product rather than assuming zero.
