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Sehtinصحتين

Hormonal mechanism

The duodenum theory and the two-hour rule

According to Dr. Al-Awadi, the stomach empties in batches over roughly two hours. With each batch, four hormones activate (insulin, gastrin, histamine, serotonin) and four hormones pause (glucagon, growth hormone, testosterone, cortisol). Two hours after the last bite, insulin clears the blood and the body shifts into repair and combustion mode.

↑ Active

Four hormones active during digestion

  1. 01

    Insulin

    Converts ingested sugar and protein into stored fat and reserves, distributed to liver, muscles and adipose tissue.

    Hormone of storage. Active during the entire two-hour digestion phase.

  2. 02

    Gastrin

    Raises gastric acid to digest food, and as a side effect activates histamine.

    Acid pathway, indirectly responsible for many post-meal sensations.

  3. 03

    Histamine

    Triggers digestive enzymes. Released in controlled amounts with tayyibat foods.

    With certain khabaith foods (eggs, chicken, yogurt, white flour) it can be released in excess of digestive needs.

  4. 04

    Serotonin

    Brings the sensation of well-being and satiety during the meal.

    Slows the stomach and may temporarily raise heart rate (a post-meal palpitation feeling).

↓ Paused

Four hormones paused during digestion

  1. 01

    Glucagon

    Burns stored fat. Completely paused for the two hours of digestion.

  2. 02

    Growth hormone

    Builds muscle and supports fat combustion. Paused during digestion.

  3. 03

    Testosterone

    Energy, vitality, focus. Paused during digestion.

  4. 04

    Cortisol

    Regulates the body's balance. Paused during the digestive phase.

02:00:00

The two-hour rule

Two hours after the last bite, insulin clears the blood and the body enters repair and combustion mode. Four processes start at the same time.

  1. Phase 01

    Starch breakdown

    The body starts dismantling stored glycogen, releasing glucose into the blood from internal reserves rather than the gut.

  2. Phase 02

    Fat combustion

    With insulin gone, glucagon is free to mobilise stored fat. Lipolysis ramps up.

  3. Phase 03

    Gluconeogenesis

    The liver synthesises glucose from non-carbohydrate sources to keep blood sugar stable when meals are spaced.

  4. Phase 04

    Ketone production

    Mild ketogenesis kicks in, a sign of a healthy liver shifting to fat as the primary fuel.

If you eat again before the two hours are up, the counter resets and the combustion phase does not happen. This is why Dr. Al-Awadi recommended spacing food intakes.

Histamine

The histamine theory

With tayyibat foods, histamine is released in controlled amounts, does its digestive work, then dissipates. With certain khabaith foods, especially eggs, chicken, yogurt and white flour, histamine can be released beyond what digestion needs.

Sensations attributed to excess histamine

  • 01Hot flushes
  • 02Nasal and sinus congestion
  • 03Water retention and bloating
  • 04Heart palpitations
  • 05Skin itching and eczema
  • 06Joint and muscle pain
  • 07Dry eyes or blurred vision
  • 08Snoring and throat fatigue
  • 09Swollen fingers on waking
  • 10Reactive hypoglycaemia after a carb meal

The scorpion metaphor

“The venom of the scorpion does not kill by itself. The body's reaction determines the severity.”

Dr. Al-Awadi often used this image to explain why the same food can affect two people differently. It is not the food alone that acts, but how the body responds. Each individual tolerance threshold is unique.

Factual summary

How the two-hour digestion rule works

The Tayyibat method describes digestion as a fixed two-hour window during which four hormones are active and four are paused. The active group is insulin, which stores incoming sugars and proteins, gastrin, which raises gastric acid, histamine, which triggers digestive enzymes, and serotonin, which produces a sense of fullness. The paused group is glucagon, growth hormone, testosterone and cortisol, all of which would normally mobilise stored fat or maintain bodily balance. After two hours, the active hormones decline and the paused ones reactivate in four successive phases: starch breakdown using stored glycogen, fat combustion driven by glucagon, gluconeogenesis in the liver to keep blood sugar stable, and finally a mild ketogenesis as the body shifts to fat as primary fuel. Spacing meals at least two hours apart is therefore the central practical rule of the system.

This article relays the public teachings of Dr. Diaa Al-Awadi for educational and informative purposes. It is not medical advice. Consult your physician before any dietary change. Legal notice.