M	SD	Factor Loading a
Factor 1 (SFLQ_1): Perceived capability finding, understanding, and assessing nutritional information
1. When I have questions on healthy nutrition, I know where I can find information on this issue.	5.24	1.48	0.57
2. In general, how well do you understand the following types of nutritional information? (6 sources)	4.82	1.29	0.48
7. Think about a usual day: how easy or difficult is it for you to compose a balanced meal at home?	5.24	1.47	0.48
8. In the past, how often were you able to help your family members or a friend if they had questions concerning nutritional issues?	4.09	1.74	0.55
9. There is a lot of information available on healthy nutrition today. How well do you manage to choose the information relevant to you?	5.20	1.39	0.77
10. How easy is it for you to judge if media information on nutritional issues can be trusted?	4.47	1.57	0.84
11. Commercials often relate foods with health. How easy is it for you to judge if the presented associations are appropriate or not?	4.55	1.57	0.80
12. How easy is it for you to evaluate if a specific food is relevant for a healthy diet?	5.34	1.27	0.75
13. How easy is it for you to evaluate the longer-term impact of your dietary habits on your health?	5.35	1.39	0.60
Factor 1 Total	4.92	1.04	-
Factor 2 (SFLQ_2): Perceived knowledge of nutritional guidelines
3. How familiar are you with the Food Wheel?	5.91	1.18	0.41
4. I know the recommendations about fruit and vegetable consumption for the Portuguese population.	5.71	1.46	0.77
5. I know the recommendations about salt intake for the Portuguese population.	5.70	1.49	0.93
6. I know the recommendations about sugar intake for the Portuguese population.	5.79	1.47	0.92
Factor 2 Total	5.78	1.19	-
Note. Ratings for all items varied between 1 and 7. Sample size for all items = 1010, except for Item 2 (n = 993). a Principal axis factoring analysis with Promax rotation.