Metabolic & Cardiometabolic
post-spike glucose dips causes food cravings
In plain terms: Do the glucose "dips" a few hours after a sugary meal actually make you hungrier and eat more?
A large CGM cohort shows post-meal glucose dips modestly predict hunger and later intake, but effects are small (r~0.2), highly individual, and correlational — not proof spikes "cause" overeating.
Evidence ladder
How far up the ladder this claim has climbed. A high consensus on a low rung means "consistent so far," not "proven in people."
Top evidence so far: All trials, pooled (Meta-analysis)
How the studies fall
The evidence (9)
| Source | Grade | Stance | Quality | Finding |
|---|---|---|---|---|
| Grimaldi 1990 · Diabete Metab | mechanism | mixed | low | Confirms adrenergic counterregulation is triggered by falling glucose (mechanistic basis for dip symptoms), but studied insulin-treated diabetics, not postprandial dips in healthy people. |
| Warren 2003 · Pediatrics | RCT | supports | moderate | Low-GI breakfasts reduced ad libitum lunch intake and delayed hunger versus high-GI breakfast in children. |
| Keogh 2007 · Eur J Clin Nutr | RCT | tested-null | low | Lower-glycemic high-fibre barley meals altered glucose/insulin but did NOT significantly reduce subsequent food intake vs white-wheat meals in healthy women. |
| Raben 2002 · Obes Rev | meta-analysis | contradicts | moderate | Systematic review found no consistent advantage of low-GI foods for satiety, ad libitum intake, or body weight. |
| Bornet 2007 · Br J Nutr | meta-analysis | supports | moderate | Systematic review: low-glycemic meals produce higher short-term satiety than high-glycemic meals. |
| Kosuda 2022 · J Nippon Med Sch | observational | supports | low | Idiopathic postprandial syndrome patients show post-meal hunger/weakness linked to abnormal glucagon response. |
| Sweatt 2026 · Nutrients | observational | mixed | low | Characterizes postprandial reactive hypoglycemia; glucose nadir varies and its link to symptoms is inconsistent. |
| Kaduk 2026 · eBioMedicine | observational | mixed | moderate | Glucose levels were associated with mood/appetite, but the association was fully mediated by conscious ratings of metabolic state, undercutting a direct subconscious glucose-craving pathway. |
| Wyatt 2021 · Nat Metab | observational | supports | moderate | In 1,070 healthy adults / 8,624 standardized meals, 2-3h glucose dips predicted more hunger and greater 3-4h and 24h energy intake, but correlations were weak (r=0.16-0.27). |
Disagree, or know a study we missed?
We grade by evidence, not opinions. The way to weigh in is to point us to a study we haven't cited (check the evidence table above first), or to flag a problem with one we have. Every submission is reviewed; if it holds up, the grade updates and shows in Science Changes Its Mind.
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Educational only, not medical advice. Grades and scores reflect published evidence weighted by study design and quality; see the methodology.