method
Dr. Diaa Al-Awadi: His Tayyibat Method, His Teaching, His Legacy
Egyptian physician, anaesthesiology consultant and founder of the Tayyibat dietary system, Dr. Diaa Al-Din Shalaby Mohamed Al-Awadi (1979-2026) shaped the way millions of Arabic speakers approach food. This article gathers the complete picture of his medical training, the Tayyibat method as he formalised it, the hormonal mechanism at its core, and the legacy carried forward after his passing in Dubai on 19 April 2026.
1. The physician and his medical training
Dr. Diaa Al-Din Shalaby Mohamed Al-Awadi was born in 1979 in Cairo into an academic family and graduated with honours from the Faculty of Medicine at Ain Shams University. He specialised in anaesthesiology, intensive care and pain management, areas that demand a precise understanding of human physiology, drug interactions and the response of the body under stress. This clinical foundation is essential to grasp before approaching his nutritional teaching: every claim he later made about hormones, digestion windows and food load was filtered through the lens of an anaesthetist who had spent years observing how the body absorbs, metabolises and recovers. He practised in Cairo and over time built a private practice that drew patients from across Egypt and the wider Arabic-speaking world.
2. From anaesthesiology to nutrition
The shift from operating theatre to dietary teaching did not come from theory but from clinical observation. Dr. Diaa Al-Awadi watched patients arrive for surgery already weighed down by metabolic disorders, chronic inflammation, and food habits that complicated recovery. He started questioning what was put into the body in the hours and weeks before the body needed to heal. Over time, he built a complete framework around three convictions: that the body has a precise digestive cycle, that some foods are calibrated for human physiology while others overload it, and that returning to a simple, traditional, animal-protein-anchored diet restores the hormonal balance most modern eating disrupts. This is the seed of what he named Tayyibat.
3. The birth of the Tayyibat system
The word Tayyibat (الطيِّبات) means in Arabic the wholesome, pure or good things. Its counterpart Khabaith (الخبائث) covers the impure, harmful or unsuitable. Both terms come from a long cultural and Quranic tradition where food is not only fuel but a moral and physiological category. Dr. Diaa Al-Awadi did not invent the words, he reactivated them as an operating framework: every food a human eats falls on one side or the other, and the decision is rarely about calories. It is about whether the food fits the body's enzymatic machinery, hormonal cadence and the rhythm at which it can metabolise without inflammation. This binary classification is the founding act of the system.
4. The six pillars of the method
The Tayyibat system stands on six pillars that Dr. Al-Awadi articulated repeatedly in his lectures and clinical sessions. First, two clean meals a day rather than three or more, leaving the digestion clear-cut. Second, the two-hour rule between the end of a meal and the next intake of anything caloric, which lets the combustion phase do its work. Third, the priority given to traditional animal protein, with lamb at the top, then liver, goat, beef. Fourth, the deliberate exclusion of foods that overload the system, from raw garlic to most legumes, from refined wheat to the long list of forbidden spices. Fifth, the use of pure cooking fats: ghee, butter, sunflower oil. Sixth, water and unsweetened green tea or black coffee as the only acceptable drinks during the digestive window.
5. The 4+4 hormone mechanism
At the physiological core of the Tayyibat method sits a deceptively simple model: four hormones run digestion, four hormones run combustion, and the two groups cannot work simultaneously. During digestion, insulin, gastrin, ghrelin and cholecystokinin lead the operations: blood is sent to the gut, fat reserves are spared, the body is in storage mode. During combustion, glucagon, growth hormone, adrenaline and cortisol take over: the gut rests, fat reserves are mobilised, the body is in repair and use mode. Eating again before the second group has had its turn shuts the door on combustion. This is why the method is built around clear gaps between meals rather than around portion size. Read the full mechanism on tayyibat/mecanisme.
6. The two-hour rule and the scorpion metaphor
Two hours is the marker Dr. Al-Awadi gave for the digestive cycle to close and for combustion to take over. To make the idea memorable he used the scorpion metaphor: a scorpion lifts its tail and stings only when its body is fully retracted. Eat before the two hours are up, and the scorpion never strikes, the fat-burn never fires. Eat after, and the body uses its reserves. This is not strict intermittent fasting, it is a precise rhythm: a tea, a coffee, an unsweetened drink does not break the cycle, but a date, a biscuit, a fruit, a glass of juice does. The window between two meals must remain dry of calories.
7. Tayyibat foods and Khabaith foods
On the Tayyibat side: lamb and goat, beef boiled then seared, lamb liver weekly, wild sea fish, free-range chicken eggs eaten elsewhere are excluded but the system retains its own short list of allowed proteins. Among plants: aged dairy such as akawi, kashkaval, halloumi, qishta cream, Medjool dates, fresh figs, pomegranate, grapes, honey, olives, olive oil, ghee, plain basmati rice, sourdough wheat. Among allowed spices: salt, green cardamom, saffron, thyme or zaatar, green anise. Tomato becomes tayyib only when peeled, deseeded and cooked. Onion becomes tayyib only when cooked, finely chopped or blended into the sauce. On the Khabaith side: garlic in any form, chicken meat, eggs, fresh dairy, lentils, chickpeas, fava beans, peanuts, raw cucumber, lettuce, fresh parsley, coriander and most fresh herbs, raw carrot, raw bell pepper, watermelon, melon, avocado, processed sugar, soft drinks, refined wheat. The list extends to many spices: cumin, cinnamon, black pepper, paprika, sumac, ginger, turmeric, almonds and pine nuts. The full list lives on tayyibat/aliments.
8. The signature method for beef
If a single recipe captures the rigour of the Tayyibat system, it is the cooking of beef. The doctor was firm: beef is heavier on digestion than lamb or goat, so it must be tamed. The protocol is in two stages. Stage one: boil the meat 60 to 75 minutes, skim the foam, keep the broth. The connective tissues soften, the gelatin enters the liquid, the muscle becomes digestible. Stage two: drain the meat, pat it dry, sear it 8 to 12 minutes in pure ghee until each side is golden and the surface caramelises. Salt at the end. The broth is reused for rice or soup. Grilled or roasted beef without the boil is, in his teaching, an error of method, not a stylistic choice. The hierarchy of land meats remains: lamb first, liver weekly, then goat, beef last.
9. Arabic-speaking reach and the transmission of the teaching
Dr. Diaa Al-Awadi reached an audience that few medical figures in the Arabic-speaking world have matched. His YouTube channel gathered 341 000 subscribers, his Facebook page nearly 2 million followers, and several large groups around the system added another 500 000 active members across Egypt, Saudi Arabia, the Emirates, Morocco, Algeria, Tunisia, Lebanon, Jordan and the wider diaspora. The reach was carried in plain spoken Arabic, with everyday words, examples drawn from family kitchens, and a refusal of medical jargon when a patient image worked better. This direct register is one of the reasons the system spread by word of mouth as much as by video, and why Tayyibat lessons were repeated in homes long before they were typed into search engines.
10. The passing in Dubai and the legacy that continues
Dr. Diaa Al-Awadi died in Dubai on 19 April 2026, at the age of 47. The Emirati medical examination concluded that the cause was a sudden cardiac arrest, with no criminal suspicion, a finding confirmed by the Egyptian Ministry of Foreign Affairs. His body was repatriated to Egypt for the funeral. The personal voice that carried the teaching for years went silent, but the teaching itself did not. The hundreds of hours of recorded lectures, the thousands of family kitchens that adopted the rhythm of two daily meals and the two-hour rule, and the children raised in households where lamb is the reference protein form a living transmission. This site exists to gather his teaching in one place, to keep it precise, accessible and faithful to what he himself formalised. For the underlying philosophy see /tayyibat/philosophie ; for a respectful, balanced view of the scientific dialogue around the system see /critiques-tayyibat ; to follow the editorial work continued in his name subscribe to the Sehtin newsletter at the bottom of this article.
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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.