The goals of this clinical trial are to learn if Nextida-GC (a peptide derived from collagen) will reduce postprandial glucose responses when taken 30 minutes before, 10 minutes before or with the first bite of a breakfast test-meal consisting or bread, margarine and jam with a drink coffee, tea or water (each subject will choose a drink and have the same drink each time). The main questions it aims to answer are: Does Nextida-GC reduce glucose responses more than whey protein? What are the effects of Nextida-GC and whey protein on plasma glucose and serum insulin responses when given 30 minutes before eating, 10 minutes before eating, or with the breakfast test meal? Overall, is it better to take Nextida-GC 30 minutes before eating, 10 minutes before eating, or with the breakfast test meal? Participants will: Come to the research center (INQUIS Clinical Research, Toronto, Ontario, Canada) on 8 separate occasions (with bewteen 3 and 14 days between visits) after an overnight fast of at least 10 hours. Each participant will undergo all 8 treatments (one treatment per visit): Block 1 * 10 grams Nextida-GC in water 30 minutes before eating the test-meal * 10 grams Nextida-GC in water 10 minutes before eating the test-meal * water 30min before eating and 10g Nextida-GC in water with the test-meal * water 30min before eating, and water with the test-meal Block 2 * 10 grams whey protein in water 30 minutes before eating the test-meal * 10 grams whey protein in water 10 minutes before eating the test-meal * water 30min before eating and 10g whey protein in water with the test-meal * water 30min before eating, and water with the test-meal The order of the blocks will be randomized and the order of the treatments within the blocks will be randomized. On each occasions finger-stick blood samples for measuring glucose and insulin will be obtained 30, 10 and 0 minutes before starting to eat the test-meal and 15, 30, 45, 60, 90, 120 and 180 minutes after the first bite of the test-meal. The main outcome of the study is the area under the curve of plasma glucose from 0 to 180 minutes.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
QUADRUPLE
Enrollment
32
Peptide derived from collagen protein
Whey protein isolate
INQUIS Clinical Research
Toronto, Ontario, Canada
RECRUITINGGlucose iAUC 0-180
Incremental area under the glucose curve (iAUC), ignoring area below the concentration at 0 min (just before starting to eat), calculated from plasma glucose measured at 15, 30, 45, 60, 90, 120 and 180 min after starting to eat.
Time frame: 0 min to 180 minutes
Insulin AUC 0-180
Incremental area under the insulin curve (iAUC), ignoring area below the concentration at 0 min (just before starting to eat), calculated from serum insulin measured at 15, 30, 45, 60, 90, 120 and 180 min after starting to eat.
Time frame: 0-180 minutes
Glucose Peak Rise
Maximum glucose concentration minus glucose concentration at 0 minutes.
Time frame: 0-180 minutes
Insulin Peak Rise
Maximum insulin concentration minus concentration at 0 min.
Time frame: 0-180 minutes
MAGE
Maximum Amplitude of Glycemic Excursion measured as the difference between the highest and lowest plasma glucose concentrations.
Time frame: 0-180 minutes
Glucose Time In Range (TIR)
The percent of time when plasma glucose is between 10.0 and 3.9 mmol/L, inclusive (plasma glucose measured at 0, 15, 30, 45, 60, 90, 120 and 180 minutes).
Time frame: 0-180 min
Glucose Time Over Range (TOR)
The percent of time when plasma glucose is over 10.0 mmol/L, (plasma glucose measured at 0, 15, 30, 45, 60, 90, 120 and 180 minutes).
Time frame: 0-180 min
Glucose Time Below Range (TBR)
The percent of time when plasma glucose is below 3.9 mmol/L, inclusive (plasma glucose measured at 0, 15, 30, 45, 60, 90, 120 and 180 minutes).
Time frame: 0-180 min
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