Table A1.

Questionnaire.

Constructs	Items	Measure/Question
Attitude	ATT1	Regular consumption of functional foods would be beneficial.
	ATT2	Regular consumption of functional foods would be pleasant.
	ATT3	Regular consumption of functional foods would be valuable.
	ATT4	Regular consumption of functional foods would be good.
Subjective norms	SN1	My acquaintances believe that I should consume functional foods regularly.
	SN2	My acquaintances expect me to consume functional foods regularly.
	SN3	My acquaintances endorse my regular consumption of functional foods.
	SN4	My acquaintances understand my regular intake of functional foods.
Perceived behavioral control	PBC1	I have complete control over whether I consume functional foods regularly.
	PBC2	My regular consumption of functional foods is beyond my control (reverse scored).
	PBC3	The decision to consume functional foods regularly lies entirely within my control.
Health consciousness	HC1	I perceive myself as health-conscious.
	HC2	I am willing to make significant sacrifices to maintain a healthy diet.
	HC3	I believe that knowledge of healthy eating practices is essential.
Trust	TR1	I completely trust functional foods to meet nutritional needs.
	TR2	I completely trust food safety regulatory authorities.
	TR3	I completely trust in the integrity of functional food producers.
Intention	INT1	I intend to eat functional foods regularly.
	INT2	I expect to eat functional foods regularly.
	INT3	I try to eat functional foods regularly.
	INT4	I plan to eat functional foods regularly.
Behavior	BEH1	How often do you eat functional foods?
	BEH2	How long have you consumed functional foods as part of your daily diet?
	BEH3	When purchasing food, what percentage of your total food consumption consists of functional foods?