The Claim

Rapidly digested carbohydrates cause postprandial blood glucose spikes, which are followed by reactive hypoglycemia and increased hunger.

Source: This Doctor’s Diet to Get Under 10% Bodyfat is So Simple, it’s Almost Crazy

What the research says

Supports is higher

Support is ahead, but a single strong opposing study can change this.

Supports
44score
Challenges
0score

These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.

How it works
4 studies reviewed
In plain English

Eating carbohydrates that digest quickly leads to a sharp rise in blood sugar, followed by a drop below normal levels and an increase in hunger.

See the scientific wording

Rapidly digested carbohydrates induce postprandial blood glucose spikes followed by reactive hypoglycemia and increased hunger.

Why this might work

When you eat fast-digesting carbs, your blood sugar spikes quickly, making your pancreas release a large amount of insulin. This insulin pulls too much sugar out of your blood too fast, causing your blood sugar to crash below normal levels. That low blood sugar triggers your brain and nervous system to signal hunger, tremors, and sweating, and it also makes your stomach release the hunger hormone ghrelin again. These signals drive you to eat more, especially sugary foods, restarting the cycle.

Verified mechanismbased on 4 studies

What the research says

4 studies

  1. Study: Reactive Hypoglycemia: A Trigger for Nutrient-Induced Endocrine and Metabolic Responses in Polycystic Ovary Syndrome

    Eating sugary snacks causes blood sugar to spike and then crash, making you hungry again sooner than eating protein. This study shows that swapping sugary snacks for protein snacks helped women lose more weight and feel less hungry.

  2. Study: Differential Modulation of Postprandial Glycemic, Incretin, and Satiety Responses by Low-Digestible Carbohydrates in Humans: An Exploratory Investigation

    This study found that carbs that don’t digest easily keep blood sugar steady and make you feel full longer. That means the opposite — carbs that digest fast — likely cause blood sugar to spike and crash, making you hungrier.

  3. Study: A ready-to-mix nutraceutical supplement (GLUBLOC) lowers postprandial blood glucose levels in healthy individuals — A randomised, placebo-controlled, crossover study

    This study showed that when you slow down how fast carbs are digested, your blood sugar doesn't spike as high. Since the claim says fast-digesting carbs cause big blood sugar spikes, this study supports that idea by showing the opposite happens when you slow digestion.

  4. Study: Reactive hypoglycemia in binge eating disorder, food addiction, and the comorbid phenotype: unravelling the metabolic drive to disordered eating behaviours

    This study found that when people drink a sugary solution, their blood sugar often spikes and then crashes, especially in those with food addiction or binge eating. This crash is linked to feeling hungrier, which supports the idea that fast-digesting carbs cause blood sugar swings and increased hunger.

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Read analysis

Score breakdown, mechanism chain, raw evidence, ideal studies needed & 4 supporting studies

Fit Body Science verdict — we translate health claims into clear verdicts backed by peer-reviewed research.

Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.