Diet That Self-Destroys ""
Doctors and specialists have confirmed that intermittent fasting is an effective dietary approach to improve health and promote weight loss—provided it is followed carefully and under medical supervision. They emphasized that it helps eliminate what they described as “harmful fat” (white fat) by converting it into beneficial fat (brown fat), which is rich in energy.
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| Doctors: "Intermittent Fasting" is a Diet That Self-Destroys "Harmful Fat" |
They warned of the health risks associated with following this regimen randomly and stressed the importance of gradual adoption, focusing on food quality, and avoiding excessive consumption of fast food and sweets to ensure the health benefits are achieved without complications.
Speaking to Emarat Al Youm, they explained that this dietary approach involves abstaining from food for periods ranging between 12 to 18 hours or more. They emphasized the need to consult a doctor before starting, especially for five categories: pregnant and breastfeeding women, insulin-dependent diabetics, elderly people with chronic illnesses, those with eating disorders, and children or adolescents in the growth phase.
They also stated that intermittent fasting may be suitable for people with type 2 diabetes who follow specific meal plans and are not fully dependent on insulin, provided there is professional medical supervision to adjust treatment and avoid low blood sugar.
Doctors pointed out that many scientific studies have confirmed the effectiveness of intermittent fasting in reducing weight, lowering blood sugar and cholesterol levels, decreasing the risk of heart disease, and improving brain function and memory.
However, they also noted that this eating pattern may lead to side effects such as headaches, dizziness, sleep disturbances, constipation, and acidity. Therefore, it is important to follow a balanced diet and drink plenty of water to maintain health and achieve optimal results.
Details:
Dr. Abdulbaset Al-Eisawy, a consultant in nephrology and internal medicine, said that intermittent fasting involves refraining from eating for specific periods ranging from 12 to 18 hours or more. This allows the body to switch from using glucose as its primary energy source to using stored fat.
He added that this dietary approach leads to reduced insulin levels, prompting the body to burn fat—a process known as metabolic switching. It also gives the digestive system time to rest, reducing bloating and digestive disorders, while stimulating the immune system to activate autophagy—the body’s process of cleaning out damaged cells. This contributes to overall health improvement and enhances mitochondrial function (the body’s energy factories) by converting harmful white fat into beneficial brown fat.
In comparison to traditional diets, Dr. Al-Eisawy stated that intermittent fasting may be more effective in many cases as it focuses not on what to eat, but when to eat. This helps regulate hunger and satiety hormones and prevents random eating, while controlling blood sugar levels—something that some conventional diets might lack.
He reiterated that many studies support the efficacy of intermittent fasting in weight loss, lowering sugar and cholesterol levels, reducing the risk of heart disease, and improving brain and memory functions.
He cautioned that five groups should avoid or consult a doctor before following intermittent fasting: pregnant and breastfeeding women, insulin-dependent diabetics, elderly individuals with chronic conditions, people with eating disorders, and children/adolescents during growth stages.
Despite its benefits, intermittent fasting may cause headaches, dizziness, sleep disturbances, constipation, and acidity. Therefore, gradual implementation is advised, along with eating balanced meals and staying well-hydrated to ensure health gains without complications.
Dr. Ahmed Abdelkarim Hassoun, an endocrinologist and metabolic specialist, confirmed that intermittent fasting directly and positively impacts insulin. By abstaining from food for specific periods, insulin levels in the blood decrease, which enhances the body’s sensitivity to insulin and reduces insulin resistance—one of the main factors behind type 2 diabetes.
He noted that intermittent fasting can be suitable for type 2 diabetics who follow specific diets and are not fully reliant on insulin therapy—provided they do so under medical supervision to prevent hypoglycemia and allow necessary treatment adjustments.
Regarding hormonal effects, he explained that intermittent fasting reduces the level of ghrelin (the hunger hormone) and increases leptin (the satiety hormone). It may also positively affect cortisol (the stress hormone) if eating and sleeping schedules are regulated. Thyroid hormone production is not directly affected, but individuals with thyroid issues should be medically monitored.
He pointed out that long-term studies have shown intermittent fasting improves cholesterol levels, blood pressure, and HbA1c, while helping prevent premature aging, and enhancing mental function and concentration. It also promotes autophagy, a process that repairs damaged cells and may extend lifespan and reduce the risk of chronic diseases. Research also shows that fasting reduces markers of inflammation and oxidative stress—both major contributors to chronic illness development.
Clinical Nutritionist Tasneem Obeid stated that intermittent fasting has emerged as one of the most effective ways to improve health and lose weight in a balanced manner. She clarified that it does not mean deprivation, but rather organizing meal times—men typically fast for 16 hours and eat within an 8-hour window, while women should avoid fasting for more than 12 hours.
She explained that during fasting, the body begins to burn fat as a source of energy, which aids in weight loss, improves blood sugar levels, and boosts energy and focus—provided calorie intake does not exceed the body’s needs. It also helps improve digestion, regulate appetite, and reduce bloating, with many people experiencing improvements within the first week.
As for supplements, she said they may not be necessary if meals are balanced, but could be useful in cases of nutrient deficiency or intense exercise—always under expert supervision.
She warned against starting intermittent fasting abruptly or without medical consultation, especially for people with chronic diseases. While symptoms such as dizziness or fatigue are normal at the beginning, it’s important to avoid overeating fast food and sweets during eating windows. She stressed that intermittent fasting is a lifestyle approach to managing food intake and improving quality of life—not just a temporary diet.
What is Intermittent Fasting?
Intermittent fasting (IF) is a dietary pattern that cycles between periods of eating and fasting. Doctors confirm that it can boost metabolism, promote fat burning, and improve overall health—especially when practiced under medical supervision.
Top 5 Health Benefits of Intermittent Fasting
- Fat Burning: Helps convert harmful white fat into energy-rich brown fat.
- Blood Sugar Control: Reduces insulin resistance and stabilizes glucose.
- Heart Health: Lowers cholesterol and blood pressure.
- Brain Function: Improves memory and cognitive performance.
- Cell Repair: Activates autophagy (cell self-cleaning process).
Comparison Between Intermittent Fasting & Traditional Diets
| Aspect | Intermittent Fasting | Traditional Diets |
|---|---|---|
| Focus | When to eat | What to eat |
| Insulin Sensitivity | Improves | Varies by type |
| Fat Burning | Enhanced during fasting | Slower process |
| Meal Flexibility | High | Restricted |
| Scientific Support | Strong for weight and metabolic health | Depends on the diet |
Who Should Avoid Intermittent Fasting?
Doctors warn that IF is not suitable for everyone. These groups should avoid or consult a doctor before starting:
- Pregnant or breastfeeding women
- Insulin-dependent diabetics
- Elderly with chronic diseases
- MPeople with eating disorders
- Children and teenagers still growing
Possible Side Effects
- Headaches
- Dizziness
- Sleep disturbances
- Constipation
- Acidity
These can be minimized by staying hydrated and eating balanced meals during eating windows.
Expert Tips to Start Safely
- Begin gradually (e.g., 12 hours fast then increase)
- Avoid overeating or consuming junk food during allowed hours
- Monitor blood sugar and hydration
- Consult your doctor before starting