The goal of this clinical trial is to to assess the nutritional status of children diagnosed with cystic fibrosis between the ages of 2-14, to determine the changes in the nutrition education given to the mothers of the patients on the nutritional status of the children and the nutritional knowledge of the mothers, and to compare them with the control group.. The main questions it aims to answer are:

1. Will be better the nutritional status of children of mothers in the education group will be better compared to the control group?
2. Will the macro and micronutrient Recommended Dietary Allowance (RDA) and diet quality of children with cystic fibrosis in education group increase after nutrition education?
3. Will the nutrition knowledge test scores of mothers of children with cystic fibrosis in education group on "Nutrition in Cystic Fibrosis" increase after nutrition education?

Mothers of children diagnosed with cystic fibrosis will participate in the study as a result of the call of the Cystic Fibrosis Association in Turkey. Mothers participating in the study will be divided into 2 groups. While the mothers in the first group will be given nutrition education 3 times a week, 1 hour a day, no education session will be given to the mothers in the control group. The nutritional status and nutrient consumption of children in the training group and the control group will be compared.

Inclusion Criteria:

• Mothers included in the research must have responded to the KIFDER (Cystic Fibrosis Association in Turkey) call.
• Children of mothers included in the research must have been officially diagnosed with cystic fibrosis.
• Mothers included in the research mustn't receive any nutrition education beforehand.
• Children of mothers included in the research mustn't be regularly followed by a dietitian.

Exclusion Criteria:

• Children of mothers included in the research mustn't have a feeding tube.
• Children of mothers included in the research mustn't be diagnosed with any other disease known to affect growth.