The serum content of higher fatty acids was studied in 45 children with rickets. It has been found that in children with rickets, unsaturated fatty acids decrease and saturated fatty acids increase. The composition of higher fatty acids in the blood serum of children with rickets receiving traditional treatment and with the use of cumin oil was studied. The inclusion of cumin oil in the therapy complex improves the fatty acid composition in children with rickets. Cumin oil improves the digestibility of lipids by almost 2 times by regulating the activity of serum lipase, increases the activity of serum lipase and thereby improves lipid metabolism