Can a vegetable smoothie keep blood sugar steady? a trial puts two recipes to the test
NCT ID NCT07729631
First seen Jul 27, 2026 · Last updated Jul 28, 2026 · Updated 1 time
Summary
This study investigates how two different fruit and vegetable smoothies affect blood sugar levels in healthy adults aged 18 to 65. Participants will drink the smoothies and a glucose control drink on separate days, with finger-prick blood samples taken over two hours. The goal is to calculate each smoothie's glycaemic index, which measures how quickly a food raises blood sugar. The findings could help people understand which smoothie formulations have a gentler impact on blood sugar.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- commercially available fruit and vegetable smoothies (GREEN and RED formulations)
- What this could lead to
- If successful, this could help people make informed choices about smoothies and blood sugar management.
- What could go wrong
- This is a small, early-stage study in healthy volunteers, so results may not apply to people with diabetes or other conditions.
This is an AI summary of the original study and may miss details. Read our disclaimer.
Study facts
What this study's own registry entry says, in plain language.
- Phase
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Not a phased trial
Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.
- Participants
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16 people
The number who actually took part.
- Started
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Oct 2025
- Finished
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Dec 2025
- Lead sponsor
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Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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18 to 65 years
- Sex
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Anyone
- Healthy volunteers
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Accepted
You do not need to have the condition being studied to take part.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: * Age: 18-65 years * Body mass index 18-30 kg/m2 Exclusion Criteria: * diagnosis of any form of diabetes * intolerances or allergies to any of the study procedures (e.g. fructose/inulin intolerance) * Fructose malabsorption * Inborn errors of fructose metabolism (e.g. fructokinase deficiency, aldolase B deficiency, fructose-1,6-bisphosphatase deficiency) * pregnant or lactating * any condition that could introduce bias to the study (e.g. diagnoses of lipid disorders, including cardiovascular disease, or therapies that alter lipid or glucose metabolism, such as statins or niacin).
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As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
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Department for Health, University of Bath
Bath, BA2 7AY, United Kingdom
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