Youths receive information from various sources inadvertently every day. A clear understanding of cardiovascular health information sources is important for the government, the private sector, and non-government organisations to devise better strategies to enable information to reach youths effectively. Besides, cardiovascular health information sources also affect youths’ subjective norms, health literacy, attitude towards cardiovascular disease prevention, and cardiovascular health information-seeking intention—these variables are crucial for youths to promote self-management skills. Thus, this conceptual paper aims to examine cardiovascular health information sources, as well as the relationship between information sources and Malaysian youths’ subjective norms, health literacy level, attitude towards cardiovascular disease prevention, and cardiovascular health information-seeking intention. This paper is significant as it can be used as a reference for future researchers, government policymakers, the private sector, and non-government organisations to plan cardiovascular disease campaigns or related activities among youths to optimise the results in reducing cases of cardiovascular disease in Malaysia.