Does the Same Calorie Count Produce a Different Response Depending on Texture?

This article previously described an unsupported chain of physiology as an established mechanism, and it cited the wrong study for one of its claims. It was rewritten in August 2026.

The earlier version said that the same meal becomes either a “fattening poison” or “burnable energy” depending on how you chew, that the pancreas “panics,” that insulin is the “fattening hormone,” and that GLP-1 is a “magic hormone.” None of these have a source.

Here is what the cited studies actually measured.

We Cited the Wrong Study (the Nut Experiment)

This article previously cited the comparison of nuts eaten whole versus as a paste as E04. E04 is the Suita Study — an observational study of masticatory ability and metabolic syndrome in middle-aged men. It is not the nut experiment.

The relevant study is E05, a within-subject crossover trial in 50 healthy adults (25 of each sex). Its actual results:

Eating the nuts whole produced higher fullness and lower hunger (p<0.05)
Blood glucose, insulin and active GLP-1 all showed no significant difference
The authors could not explain the difference in fullness through hormones; they raise a neural pathway as a possibility in the discussion but did not test it

The article also stated that swallowing without chewing increases the proportion excreted in faeces as large chunks. E05 did not measure faecal energy loss. That sentence has been removed.

What Is Known About Insulin

This article previously said that when blood sugar rises rapidly from fast eating, “the pancreas panics and secretes an unnecessarily large amount of insulin.” No study this site cites shows that.

It cited E02 as the basis for a “GLP-1 secretion mechanism.” E02 is a doctoral thesis in mice that was not published in a peer-reviewed journal. In its acute experiment, insulin secretion showed no significant difference under any condition.

Here is what the human trials that specified a chewing count found:

E17 (Sonoki et al. 2013) — thirty chews per bite significantly raised active GLP-1 at 30 minutes. But glucose and insulin did not change under any condition, and there was no significant difference in fifteen patients with type 2 diabetes
E19 (Xu J et al. 2015) — gum chewing raised GLP-1 significantly. But glucose, insulin and GIP showed no significant differences

In other words, no trial that varied chewing count found a change in how insulin is released.

Trials that varied food form disagree with each other. E05 found no differences in hormones or glucose, while E20 (Kamemoto et al. 2024, shredded cabbage versus puree) found higher areas under the curve for insulin and GIP. But E20 found no difference in glucose, and at 30 minutes glucose was actually higher in the chewing condition, and it was funded by Kewpie Corporation with 3 of its 9 authors employed there.

What Is Known About Postprandial Energy Expenditure (DIT)

E03 is a randomised crossover trial in 11 healthy young men. A 200 kcal liquid meal was consumed under three conditions — swallowed directly, held in the mouth for 30 seconds, or chewed for 30 seconds — and DIT over the following 90 minutes rose from 3.4 to 5.6 to 7.4 kcal (p<0.05).

This article previously said that DIT “increases in proportion to the number of chewing times and the duration.” The study compared three conditions; it did not establish a proportional relationship.

And the difference between chewing and control was about 4 kcal over 90 minutes. Neither body weight nor body fat was measured. The authors themselves write only that chewing “may” help prevent overweight.

The article also claimed that without chewing, DIT stays off and the ingested 500 kcal weighs on the body as it is. No study measuring that was cited.

What We Removed

“Fattening poison” and “burnable energy” — no source
“The pancreas panics” and “a rampage of insulin” — same
“Insulin is also known as the fattening hormone” and “GLP-1 is a magic hormone” — these are not descriptions from the research
“The sympathetic nervous system and the histamine nervous system are not sufficiently stimulated” — no study measuring that pathway was cited
“Cutting-edge nutritional metabolism is sounding the alarm” — we cannot say who warned of what

What Can Be Said Within the Evidence

For the same food, the whole form produces more fullness than a paste (50 adults)
In the same study, blood glucose, insulin and active GLP-1 showed no differences
Chewing more has been reported to raise postprandial energy expenditure by about 4 kcal over 90 minutes (11 men)
That study measured neither body weight nor body fat
No trial cited here found that varying chewing count changed how insulin is released

This is not an argument that calorie balance is wrong. This site has not identified a study showing that how you chew overturns calorie balance.

If you need to make specific decisions about your weight or blood glucose, please consult a physician or registered dietitian. This site introduces research on chewing and has not been reviewed by a medical professional.

This article is intended for informational purposes only and is not a substitute for diagnosis or treatment.