Objectives:
One of the dangerous phenomena that reinforces a negative attitude towards one’s own body is the so-called family fat talk1, i.e. conversations initiated by carers/siblings selfdevaluing body shapes and sizes. The aim of our own research was to adapt the self-report two-factor tool Family Fat Talk Questionnaire (FFTQ) by MacDonald et al., which may be used in the prophylaxis of maladaptive behaviours towards eating and the body, especially in the adolescent population.

Methods:
The study covered 391 people at the turn of late adolescence and early adulthood. The following were used: (1) personal questionnaire – to control secondary variables (e.g. gender, BMI, difference between the actual and desired body weight), (2) Family Fat Talk Questionnaire in the Polish language version (FFTQ-PL) and (3) Kwestionariusz wizerunku ciała (KWCO) by A. Głębocka to check external accuracy.

Results:
The research results indicate that the FFTQ-PL has satisfactory reliability and measurement accuracy, and its two-factor structure (factor 1 – “I”; factor 2 – “Family”) has been confirmed.

Conclusions:
This measure is worth using in screening studies to identify people – especially adolescents – engaging in self-devaluing conversations within the family. It turns out that fat talk, especially in the case of people with a negative body image, can become a risk factor for risky eating practices.