The paper presents a study that examines older Finnish adults’ self-perceived capability to access, evaluate, understand and use health-related information, and their perceived ability to influence their health themselves, and the relationship between these factors and their current health, health behaviour and information seeking. Questionnaires were mailed by post to 1000 Finns aged 65–79 years, and a total of 281 completed questionnaires (28%) were returned. Of these, 273 were included in the study. Cross-tabulation and chi-square tests were used for the analysis. Results showed that both a stronger belief in one’s capability to master health information and to act in a healthy manner were positively linked to better health and health behaviour as well as more active information behaviour. These beliefs can be important factors for influencing certain health behaviours and even behaviour change.