Abstract
Calcium (Ca) is a vital nutrient essential for structural development and signal transmission in both plants and animals. In humans, inadequate calcium intake has been correlated with various diseases, including osteoporosis, cardiovascular and cerebrovascular diseases, and cancer. In areas where plants serve as a main dietary source, calcium intake is significantly lower than the recommended adequate intake, notably in low- and middle-income countries (LMICs). Exploring the connections between calcium consumption and cardiovascular disease (CVD) and cancer has significant implications for public health, given that these two conditions are the primary contributors to global mortality. This study conducted a systematic review of existing literature to assess the evidence regarding calcium intake and its effect on blood pressure control, stroke prevention, and the controversial association with myocardial infarction. Furthermore, the preventive effect of calcium intake on tumor development, particularly in cancer prevention, was discussed. The study explores the potential of agronomic biofortification as a key strategy to enhance plant-based dietary calcium density and improve human health. By advocating for the incorporation of calcium-rich plants and plant-derived products, alongside appropriate calcium supplementation, the study emphasizes the economic and practical benefits of plants as a calcium source. This approach is aligned with global dietary patterns and socioeconomic disparities. The review also highlights the need for further research to better understand the mechanisms through which agronomic biofortification can increase dietary calcium intake and reduce the risks of CVD and cancer associated with calcium deficiency. Ultimately, this study aims to deepen our understanding of the complex relationship between calcium intake and health.