Compare sugar-free protein powders, drinks and supplements on the sugar per serving, the sweeteners used and the cost per serving. Our filter is a starting point, so check the nutrition panel and ingredients for the exact product and flavour.
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What does sugar-free mean on a label?
A "sugars-free" claim can only be made where a product contains no more than 0.5g of sugars per 100g or 100ml. "Low sugars" means no more than 5g per 100g for solids or 2.5g per 100ml for liquids, and "with no added sugars" means no added sugars or any other food used for its sweetening properties.
So sugar-free, low sugar and no added sugar aren't interchangeable. Check the "of which sugars" line on the nutrition panel, per 100g and per serving.
What sweeteners are in sugar-free supplements?
Most sugar-free powders, drinks and gummies use sweeteners or polyols (sugar alcohols) instead of sugar. UK labelling rules say foods containing sweeteners must carry the statement "with sweetener(s)" with the name of the food, products with aspartame must say they contain a source of phenylalanine, and foods with more than 10% added polyols must say "excessive consumption may produce laxative effects".
If you avoid a particular sweetener, read the full ingredients list rather than the front of the pack.
Is sugar-free the same as calorie-free?
No. Sugar-free protein powders still contain protein and often some fat and carbohydrate, so check the calories per serving as well as the sugar.
Some products in this filter, such as energy drinks, energy shots and pre-workouts, also contain caffeine. EFSA (the European Food Safety Authority) says single doses of up to 200mg and intakes up to 400mg per day from all sources do not raise safety concerns for healthy adults, or up to 200mg a day if you're pregnant or breastfeeding. Add up caffeine across everything you have, and speak to your GP or pharmacist if you have a medical condition or take medication.
"We think customers should compare the actual amount of active ingredients they're getting, rather than just the format or marketing," says Andy Arshad, who runs SupplementHQ. Our guide to reading a supplement label explains the nutrition panel.
We sell the products on this page. That's our commercial interest, and it's why we show the evidence alongside them. This page is general information for adults, not personalised medical advice. Food supplements should not replace a varied, balanced diet.
Written by Andy Arshad, SupplementHQ. Last reviewed 11 October 2026.