Postprandial reactive hypoglycemia.
Level 5 - mechanism / opinion, no new human data
Narrative clinical review without systematic review methodology
What was done
This narrative review evaluated diagnostic criteria, underlying pathophysiological mechanisms, clinical features, and management approaches for postprandial reactive hypoglycemia (PRH) based on clinical literature.
What was found
PRH is diagnosed when sympathetic and neuroglucopenic symptoms occur concurrently with blood glucose below 3.3 mmol/L. The review notes that oral glucose tolerance testing produces false positives and mixed meals produce false negatives, recommending ambulatory glycemic control or a hyperglucidic breakfast test instead. The author attributes 50-70% of PRH cases to uncompensated high insulin sensitivity (frequent in lean individuals, after massive weight loss, or in women with lower body overweight). Other mechanisms cited include exaggerated insulin responses from insulin resistance or elevated GLP-1, renal glycosuria, and glucagon response defects. Dietary modification is highlighted as the main intervention, with alpha-glucosidase inhibitors as potential adjunctive therapy.
Why it matters
The review summarizes diagnostic pitfalls and emphasizes high insulin sensitivity rather than insulin resistance as the primary driver in the majority of PRH presentations.
Limits
This is a narrative review presenting clinical consensus and mechanisms without systematic search methodology, meta-analytic data, or direct trial outcome numbers in the abstract.
Cited by
- supports In hypoglycemia, consuming refined sugar or starches elevates blood sugar temporarily but triggers an insulin spike that drives glucose back down, worsening the condition over time.