Abstract Background Nutrition is one of the most important factors for a person that affects the quality and length of life. Nutrition has a fundamental influence on the maintenance of health or the development of disease and participates in the correct growth and development of an individual. Nutrition is especially important in the early stages of life, when a child’s organism develops dramatically. Mothers have the greatest influence on a child’s nutrition, and therefore it is advisable to educate them appropriately and also educate them early, from child birth or before. And early nutrition is provided through breastfeeding. Objectives To improve the knowledge of healthcare workers in the field of breastfeeding and nutrition of children up to one year of age. To strengthen the breastfeeding skills of mothers. To motivate healthcare workers to educate mothers in maternity wards and GP offices. Results Using a questionnaire, we analyzed the knowledge of 716 mothers of children under two years of age. 91 % of female respondents knew that the child should be breastfed according to his/her needs. Only 66 % of women were educated and informed about the importance and technique of breastfeeding. Educational material was prepared and distributed for midwives, nurses and doctors on breastfeeding and feeding children up to one year of age. Conclusions The level of awareness of health professionals about breastfeeding and nutrition is still insufficient. There is a need to continue to educate and support healthcare workers in this area and to motivate them in providing information to mothers. Key messages • Breastfeeding and feeding children up to one year of age are important for a child’s health. • The advisory activity of healthcare workers is key to improving public health. Health workers should help mothers not only with advice but also with practical help with breastfeeding.