Objective: The Modified Atkins diet (MAD) is a complementary therapy for epilepsies and it originated as a version of the classic ketogenic diet. Unlike the classic ketogenic diet, MAD has no need for previous fasting nor hospitalization. As a high-fat diet, it is less restricted than the classic ketogenic died since it doesn’t require limitations within the energy and protein intake. Both are used in order to reduce the frequency of seizures in patients with refractory epilepsy. Side effects are still present while conducting the diet, but they are less frequent. Main objective is to examine the effects of MAD on seizure frequency in patients with refractory epilepsies who were treated at the Department of neurology and child psychiatry of Clinic for pediatrics of Clinical hospital center Rijeka and the Referal center of the Ministry of health of the Republic of Croatia for epilepsy and convulsive disorders. Participants and methods: In 18 participants diagnosed with refractory epilepsy MAD has been conducted. In the first month, carbohydrate intake was reduced on 10 g per day with the monthly rise for 5 g per day till 20 g per day was achieved. Supplements were added to the diet, mainly required vitamins and minerals and use of KetoCal® 4:1 enabled as well. On a monthly basis, follow up was done on biochemical and anthropometric parameters and caregivers lead the diary of epileptic seizures as well as food records. Results: Seven participants were excluded from the survey. In 10/11 of participants diet has been conducted over one month and the reduction of seizures has been reported in 90,9% of participants. Within the patients who responded to diet, 40% had a reduction of seizures over 50% and 60% over 75%. Diet has been effective regardless of the diagnosis and age subgroup within the child population. The most common developed side effects were loss of body weight, constipation and anorexia. All patients with available documentation had an abnormal lipid profile. Conclusion: The use of MAD was effective for participants with refractory epilepsy and the developed side effects haven't represented the long-term risks. The MAD has proven to be succesfull complementary therapy and it should be applied as a standard therapeutic procedure in children with refractory epilepsy.