How the Awady Diet Works: Tayyebat Diet Science
If you want to understand how the Awady diet works, you have to start with a claim, not a fact. The whole system rests on a single idea proposed by the late Egyptian physician Dr. Diaa Al-Awadi: that the food you eat does not just feed you, it flips a set of hormonal switches on and off. This article walks through the Tayyebat diet science exactly as the system frames it, in plain language, so you can judge it for yourself. Every point below is what the system claims, not established medicine. For the wider picture, see our overview of what the Tayyebat Diet actually is.
Where the story begins: the duodenum and the two-hour cycle
The system holds that digestion is not one big event but a slow drip. According to Dr. Diaa, your stomach does not dump its contents all at once; it releases food in small batches into the first part of the small intestine, the duodenum. Each batch, the system says, sends a signal that tells the body to fire off hormones. This cycle is claimed to run for roughly two hours, until the stomach is completely empty.
From this the system draws a rule that surprises many newcomers: it argues that morning antacids sabotage the whole sequence. Dr. Diaa's view is that taking acid-suppressing pills on an empty stomach blocks stomach acid, so the correct signal never reaches the duodenum, and the hormones never fire in their natural order. This is one reason the system places antacids on the forbidden list. Treat that as the system's position, not medical advice, and never stop a medication your doctor prescribed.
The four hormones the Tayyebat diet says switch ON while you eat
The heart of the Tayyebat diet science is this quartet. The system claims that four hormones turn on the moment food arrives:
- Insulin โ described as a pure storage hormone. The system says it takes the sugar and protein you just ate and converts them into fat and starch, tucked away in the liver, muscles, and belly.
- Gastrin โ said to raise stomach acid to break down food, and, as a side effect, to switch on histamine.
- Histamine โ claimed to trigger the digestive enzymes. With clean, allowed foods the system says it behaves; with forbidden foods it argues histamine floods out in excess, and that is where the trouble starts.
- Serotonin โ credited with the feeling of contentment during a meal. The system also blames it for slowing the stomach and briefly nudging up your heart rate, which it offers as the reason some people feel palpitations after eating.
These are the Tayyebat diet hormones the system says you should care about most, because it claims they are the reason food can make you feel good and, minutes later, make you feel awful.
And the hormones it says switch OFF until two hours pass
The flip side, according to Dr. Diaa, is that a whole team of "repair and burn" hormones goes quiet while insulin is high. The system lists them as switched off during the two-hour window:
- Glucagon โ said to burn stored fat; claimed to be fully off for the two hours.
- Growth hormone โ described as building muscle and burning fat; switched off.
- Testosterone โ credited with drive, energy, and focus; switched off.
- Cortisol โ framed here as a balancer under stress; switched off.
The system claims there are seven to eight "anti-insulin" hormones in total, all on standby, waiting for the two-hour clock to run out before they can do their work. And it adds a strict corollary: eat again before the two hours are up, and the clock resets to zero, so no fat-burning happens at all.
Histamine and food: why the system says forbidden meals wear you out
This is the part the system leans on hardest, and where the keyword histamine and food becomes central. Dr. Diaa's argument is that with allowed foods, histamine is released in a measured dose, does its job, and clears. With forbidden foods, however, the system claims histamine pours out far beyond what digestion needs. It names eggs, chicken, yoghurt, and white flour as classic triggers.
The system then attributes a long, scattered list of symptoms to that histamine overload, symptoms it says people rarely connect back to their plate:
- Hot flashes and a feeling of body heat
- Nasal and sinus congestion
- Water retention and bloating
- Heart palpitations
- Eczema, itching, and skin patches
- Joint and muscle aches
- Dry or blurry eyes
- Snoring and throat strain
- Swollen fingers in the morning
Dr. Diaa goes further and argues that hot flashes in women over 35, often blamed on hormonal change, are in most cases a histamine reaction to food instead. He also claims that the resulting inflammation thickens the blood, because the immune system releases proteins and immune cells, which he says slows circulation and explains that heavy, sluggish feeling after a forbidden meal. Mainstream medicine does not accept this explanation, a point we return to at the end.
Insulin as a storage unit
The system insists insulin has exactly one job: storage. It claims insulin converts your sugar and protein into fat and starch parked in the liver, muscles, belly, and under the skin. Keep insulin high by eating too often or eating forbidden foods, the system argues, and the liver turns "fatty and starchy," which it presents as the start of a chain reaction.
From there the claims get bolder. Dr. Diaa suggests fat and starch can even deposit in the narrow wrist tunnels where nerves pass, offering that as one explanation for carpal tunnel pain. He claims chronically high insulin can make muscle fibres look bigger while being padded with starch and fat rather than real muscle, so they tire quickly. And he links high insulin to amyloid protein deposits in tissues rich in insulin receptors. These are the system's explanations, not confirmed medical findings.
Cholesterol as a hormone factory
Here the system reframes a villain as a hero. It claims that once insulin clears after the two-hour window, the liver produces cholesterol, not because cholesterol is harmful, but because Dr. Diaa says it is the raw material for four essentials: vitamin D, the sex hormones, cortisol, and the bile salts that digest fat. The system's conclusion is that if insulin stays chronically high, the liver cannot make cholesterol properly, and it attributes many cases of low vitamin D, hormonal weakness, and poor fat digestion to diet as the root cause.
Stress raises blood sugar with no food at all
The system also claims that blood sugar does not need food to climb. Any psychological stress, a fight, anxiety, tension, is said to trigger cortisol, which signals the liver to manufacture extra sugar to prepare for a threat. Dr. Diaa uses this to explain why some people with diabetes see high readings on stressful days even when they followed their plan perfectly, and he frames that sugar as a normal survival response rather than a diet failure.
The child who collapsed on the pitch
To make the insulin idea vivid, Dr. Diaa tells the story of a boy who ate a banana-and-jam sandwich before a football match. The child played the first half fine, then suddenly collapsed, drenched in sweat and exhausted. The system's explanation: the meal spiked insulin, which swept sugar out of the blood into storage, so when his muscles needed fuel mid-run there was nothing left. The crash, the system argues, was not hunger but insulin working too well at the worst moment, what it calls reactive hypoglycaemia after a high-carb meal.
The scorpion analogy
Dr. Diaa's favourite image sums up the whole theory: "A scorpion's venom doesn't kill you, your body's histamine reaction to it does." Applied to food, the system argues that eggs, chicken, and milk are not poisons in themselves; it is your body's excessive histamine response that causes the symptoms. This, the system says, is why the same food hits some people far harder than others, because everyone's response threshold differs.
What mainstream medicine says about this theory
Here is the honest part. Most of the mechanisms above are the system's own framing, and much of it is disputed or rejected by mainstream doctors and dietitians. There are no peer-reviewed clinical trials behind these hormonal claims, and the idea that eliminating entire food groups is the fix runs against decades of nutrition evidence. Several physicians have pushed back hard, some calling the diet outright dangerous. Before you take any of this as medical fact, read the criticisms and opposing views in full, and never stop prescribed medication based on it. You can also learn more about Dr. Diaa Al-Awadi himself, browse the complete reference guide, or just play with our lighthearted food photo judge to see whether a dish would fit the system.