Upprätta det glykemiska indexet för fruktdrycker med olika mätmetoder
Studie för att undersöka glykemiska svar på intag av fruktjuicer och smoothies med olika mätmetoder.
Glycaemic responses to carbohydrates ingested as fruit sugars may vary depending on factors inherent to the fruit and the type of sugar. The aim of this project is to investigate the glycaemic responses to a range of commercially available fruit drinks and to establish the glycaemic index for each product relative to a glucose reference. Differences in recorded responses could also be influenced by the sample type (capillary blood vs interstitial fluid) and participant characteristics. Participants will ingest 8 test drinks including 5 different fruit drinks (OJ, AJ, S&B, ENERGISE, BLUE), each matched for carbohydrate to the glucose reference (CONTROL) which will be sampled two times, an additional sample of one of the smoothies (S&B) will also be replicated. Fingerstick capillary blood sampling alongside dual sited continuous glucose monitors (CGM) will measure glucose and lactate concentrations, subjective appetite sensations will also be recorded. The tests will follow best practice guidelines for glycaemic index testing. These data will provide insight into how differing formulations can alter the glycaemic responses to fruit drinks, and whether sampling technique can affect the interpretations of measurement.
Studieöversikt
Status
Betingelser
Intervention / Behandling
Studietyp
Inskrivning (Faktisk)
Fas
- Inte tillämpbar
Kontakter och platser
Studieorter
-
-
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Bath, Storbritannien, BA2 7AY
- Department for Health, University of Bath
-
-
Deltagandekriterier
Urvalskriterier
Åldrar som är berättigade till studier
Tar emot friska volontärer
Kön som är behöriga för studier
Beskrivning
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).
Studieplan
Hur är studien utformad?
Designdetaljer
- Primärt syfte: Grundläggande vetenskap
- Tilldelning: Randomiserad
- Interventionsmodell: Crossover tilldelning
- Maskning: Ingen (Open Label)
Vapen och interventioner
Deltagargrupp / Arm |
Intervention / Behandling |
|---|---|
|
Aktiv komparator: CONTROL
50 g glucose (55 g dextrose powder accounting for hydration) plus 641 mL water |
Commercially available fruit drinks or smoothies |
|
Aktiv komparator: REPLICATE CONTROL
50 g glucose (55 g dextrose powder accounting for hydration) plus 641 mL water |
Commercially available fruit drinks or smoothies |
|
Experimentell: S&B
417 mL of commercially available "Strawberries & Bananas" fruit smoothie providing 50 g carbohydrate [strawberries (31%), apples, bananas (22%), white grapes, oranges, blackcurrants]. Plus 224 mL water to standardise volume |
Commercially available fruit drinks or smoothies |
|
Experimentell: REPLICATE S&B
417 mL of commercially available "Strawberries & Bananas" fruit smoothie providing 50 g carbohydrate [strawberries (31%), apples, bananas (22%), white grapes, oranges, blackcurrants]. Plus 224 mL water to standardise volume |
Commercially available fruit drinks or smoothies |
|
Experimentell: OJ
641 mL of commercially available "Smooth Orange Juice" providing 50 g of carbohydrate [100% oranges] |
Commercially available fruit drinks or smoothies |
|
Experimentell: AJ
455 mL commercially available "Apple Juice" providing 50 g of carbohydrate [apples, ascorbic acid]. Plus 186 mL water to standardise volume |
Commercially available fruit drinks or smoothies |
|
Experimentell: ENERGISE
417 mL of commercially available "Energise Super Smoothie" providing 50 g carbohydrate [apples (50%), red grapes, bananas, strawberries (10%), blackcurrants, sour cherries (3.3%), pressed beetroot, flax seeds (0.56%), guarana infusion (0.01%), vitamins B1, B2, B3, B6, C & E]. Plus 224 mL water to standardise volume |
Commercially available fruit drinks or smoothies |
|
Experimentell: BLUE
521 mL of commercially available "Bolt from the Blue" juice drink providing 50 g carbohydrate [apple (66%), coconut water (18%), white grapes, white guava (5.2%), passion fruit, lime (0.87%), spirulina extract (0.81%) vitamins B1, B2, B3, B6, C & E]. Plus 120 mL water to standardise volume |
Commercially available fruit drinks or smoothies |
Vad mäter studien?
Primära resultatmått
Resultatmått |
Åtgärdsbeskrivning |
Tidsram |
|---|---|---|
|
Glycaemic indices for 5 test drinks measured using capillary blood samples
Tidsram: 120 minutes
|
Glycaemic indices [2-hour incremental area under the glucose curve (mmol/L-1x120 minutes) for each of the 5 test drinks relative to mean value of control conditions (CONTROL, REPLICATE CONTROL), expressed as a percentage] in capillary blood samples |
120 minutes
|
Sekundära resultatmått
Resultatmått |
Åtgärdsbeskrivning |
Tidsram |
|---|---|---|
|
Glycaemic index of all conditions with capillary blood samples vs CGM
Tidsram: 120 minutes
|
The difference in glycaemic index [2-hour incremental area under the glucose curve (mmol/L-1x120 minutes) for 5 test drinks relative to mean control (CONTROL, REPLICATE CONTROL), expressed as a percentage] in capillary blood samples versus continuous glucose monitors. |
120 minutes
|
Andra resultatmått
Resultatmått |
Åtgärdsbeskrivning |
Tidsram |
|---|---|---|
|
Comparisons between conditions in glucose concentration in capillary samples
Tidsram: 120 minutes
|
Comparison of blood glucose concentration 2-hour incremental area under the curve (iAUC) min.mmol/L between test conditions |
120 minutes
|
|
Comparisons between conditions in glucose concentration in capillary samples
Tidsram: 120 minutes
|
Comparison of postprandial peak concentration mmol/L of blood glucose between test conditions (Cmax) |
120 minutes
|
|
Comparisons between conditions in glucose concentration in capillary samples
Tidsram: 120 minutes
|
Comparison of time to peak blood glucose concentration in minutes (Tmax) between test conditions |
120 minutes
|
|
Comparisons between conditions in glucose concentration in capillary samples
Tidsram: 120 minutes
|
Comparison of blood glucose concentration mmol/L at 2 hours between test conditions |
120 minutes
|
|
Comparisons between conditions in glucose concentration with CGM
Tidsram: 120 minutes
|
Comparison of glucose concentration 2-hour incremental area under the curve (iAUC) min.mmol/L between test conditions |
120 minutes
|
|
Comparisons between conditions in glucose concentration with CGM
Tidsram: 120 minutes
|
Comparison of postprandial peak concentration mmol/L of glucose between test conditions (Cmax) |
120 minutes
|
|
Comparisons between conditions in glucose concentration with CGM
Tidsram: 120 minutes
|
Comparison of time to peak glucose concentration in minutes (Tmax) between test conditions |
120 minutes
|
|
Comparisons between conditions in glucose concentration with CGM
Tidsram: 120 minutes
|
Comparison of glucose concentration mmol/L at 2 hours between test conditions |
120 minutes
|
|
Comparisons between conditions in lactate concentration in capillary samples
Tidsram: 120 minutes
|
Comparison of blood lactate concentration 2-hour incremental area under the curve (iAUC) min.mmol/L between test conditions |
120 minutes
|
|
Comparisons between conditions in lactate concentration in capillary samples
Tidsram: 120 minutes
|
Comparison of postprandial peak concentration mmol/L of blood lactate between test conditions (Cmax) |
120 minutes
|
|
Comparisons between conditions in lactate concentration in capillary samples
Tidsram: 120 minutes
|
Comparison of time to peak blood lactate concentration in minutes (Tmax) between test conditions |
120 minutes
|
|
Comparisons between conditions in lactate concentration in capillary samples
Tidsram: 120 minutes
|
Comparison of blood lactate concentration mmol/L at 2 hours between test conditions |
120 minutes
|
|
Comparisons between conditions of appetite ratings
Tidsram: 120 minutes
|
Comparison of subjective appetite sensations assessed with visual analogue scales (2-hour area under the curve min.mmVAS) |
120 minutes
|
|
Comparisons between individuals
Tidsram: 120 minutes
|
Comparison of Postprandial lactate concentration min.mmol/L between individuals 2-hour incremental area under curve (iAUC) |
120 minutes
|
|
Comparisons between individuals
Tidsram: 120 minutes
|
Comparison of Postprandial glucose concentration min.mmol/L between individuals 2-hour incremental area under curve (iAUC) |
120 minutes
|
|
Comparisons between individuals
Tidsram: 120 minutes
|
Comparison of Appetite rating responses min.mmVAS between individuals 2-hour area under curve (AUC) |
120 minutes
|
|
Comparisons within individuals
Tidsram: 120 minutes
|
Comparison within individuals of interstitial glucose concentrations measurements from continuous glucose monitors on left and right arms. |
120 minutes
|
Samarbetspartners och utredare
Sponsor
Publikationer och användbara länkar
Studieavstämningsdatum
Studera stora datum
Studiestart (Faktisk)
Primärt slutförande (Faktisk)
Avslutad studie (Faktisk)
Studieregistreringsdatum
Först inskickad
Först inskickad som uppfyllde QC-kriterierna
Första postat (Faktisk)
Uppdateringar av studier
Senaste uppdatering publicerad (Faktisk)
Senaste inskickade uppdateringen som uppfyllde QC-kriterierna
Senast verifierad
Mer information
Termer relaterade till denna studie
Nyckelord
Andra studie-ID-nummer
- 7134-9931
Plan för individuella deltagardata (IPD)
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IPD-planbeskrivning
De-identified data will be made available open access on the University of Bath Research Data Archive (RDA) at the point of publication in a peer-reviewed journal.
Tidsram för IPD-delning
These will become available at the point of publication permanently
IPD-delning som stöder informationstyp
- STUDY_PROTOCOL
- SAV
- ICF
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