Nutrition care delivered in primary health care setting is an effective and necessary preventive health care measure. General practitioners (GPs) nutrition knowledge is related to their nutrition care practice. The aim of this study was to explore the nutrition knowledge of Croatian GPs, and to investigate its connection with the implementation of nutrition care in GPs’ offices. A cross-sectional study was conducted among 17.0% of randomly selected GPs, from May to July 2013, via an anonymous questionnaire. The study showed that only 35.8% of the Croatian GPs had an adequate level of nutrition knowledge (five or more correct answers to nutrition questions). The study further revealed that females, GPs with additional education in nutrition and GPs who had not suffered from chronic diseases with poor nutrition posing as a risk factor had better nutrition knowledge (p
= 0.029, p
< 0.001 and p
= 0.041, respectively). The Spearman rank correlation between GPs’ nutrition knowledge and the implementation of nutrition care in their offices during daily work with patients was rs
= −0.190 (p
< 0.001). To provide nutrition care in GPs’ offices in Croatia, strategies for improving GPs’ nutrition knowledge are needed.
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