Explore if the modified specific carbohydrate diet has an effect on asthma control in children and if it will affect the frequency, severity, and duration of asthma and thus provide it as a potential complementary treatment option for them.

Assess control based on the usual asthma medications only

All children at the start of the study will be subjected to:

1. Full history taking including demographic and medical history

2. Full nutritional assessment including: Through clinical examination for any signs of vitamins and mineral deficiency, with full chest examination.

3. Laboratory tests: Complete blood picture with differential white blood cells, and Serum IgE level

4. At the beginning of the study and at the end

   1. The patients will be assessed using the childhood-asthma control test (C-ACT) as a subjective method
   2. Pulmonary function tests will be performed using spirometry (Spirostik, Geratherm) that includes Forced vital capacity (FVC), forced expiratory volume in the first second of FVC (FEV1), and FEV1/FVC.
   3. Anthropometric measurements: Weight, Height, and Body mass index (BMI). All measures will be plotted on specific percentile curves for age and Z score

The C-ACT consists of a 7-item validated questionnaire, addresses the previous 4 weeks and is divided into two parts. One part is filled in by the child and consists of four questions on perception of asthma control, limitation of activities, coughing and awakenings at night. Each question has four response options. The second part is filled in by the parent or caregiver and consists of three questions (daytime complaints, daytime wheezing and awakenings at night) with six response options. The sum of all scores yields the C-ACT score, ranging from 0 (poorest asthma control) to 27 (optimal asthma control). A cut-off point ≤ 19indicates uncontrolled asthma

Will be performed using spirometry (Spirostik, Geratherm) to measure forced expiratory volume at the end of the first second.

Will be performed using spirometry (Spirostik, Geratherm) to measure forced vital capacity.