Rickets is not only a pediatric, but also a medico-social problem, the essence of which is a violation of general metabolism, phosphorus-calcium, lipid metabolism, disorders of skeletal mineralization and the functional state of internal organs and systems. Gas chromatography is one of the methods for determining markers of metabolic processes in the human body. In this regard, a special place is occupied by fatty acids, the determination of which is easily performed by the method of gas-liquid chromatography. To achieve this goal, we examined 87 patients with rickets. Of these, 45 children with rickets, aggravated by pneumonia and malnutrition, are inpatient treatment. The examined patients were divided into 2 groups. Group I of children (38 patients) with rickets received the traditional method of therapy. Group II of the examined children with rickets (49 patients) received apricot oil and aevit against the background of the traditional method of treatment. In the examined children with rickets, who received traditional treatment, there was a wide range of fluctuations in the studied parameters of lipid metabolism. It was revealed that with rickets in children there are significant violations of the content of fatty acids. To correct the dismetabolism of higher fatty acids, along with traditional therapy, it is recommended to prescribe apricot oil and aevit, which ensures high efficiency of therapy in children with rickets.