Are there interindividual differences in the reactive hypoglycaemia response to breakfast? A replicate crossover...

Area of Science:

• Metabolic responses to meals
• Human physiology
• Nutritional science

Background:

• Reactive hypoglycaemia, a drop in blood glucose post-meal, is a known phenomenon.
• Inter-individual differences in this response have not been previously studied.

Purpose of the Study:

• To investigate inter-individual variability in reactive hypoglycaemia following breakfast consumption.
• To analyze glucose, insulin, and other metabolic markers in response to a standardized breakfast.

Main Methods:

• A replicate crossover design with 12 healthy men (18-30 years).
• Participants consumed a standardized breakfast (444 kcal) or fasted.
• Measured blood glucose, lactate, insulin, NEFA, energy expenditure, substrate oxidation, and appetite.

Main Results:

• Breakfast lowered 2-h blood glucose and NEFA, and increased lactate and insulin (p < 0.01).
• Significant correlations were found for insulin, lactate, hunger, and satisfaction responses between replicates.
• Inter-individual variability in 2-h insulin response was significant (SD 11 pmol/L).

Conclusions:

• No meaningful inter-individual variability in reactive hypoglycaemia was detected at the group level.
• Significant inter-individual variability exists in the 2-h insulin response to breakfast.
• This variability may be linked to carbohydrate intake and individual insulin sensitivity.