Calcium supplementation for women: A complete guide to scientific cognition and health practice. Calcium is one of the most abundant minerals in the human body and plays an irreplaceable role in maintaining bone health, muscle contraction, nerve conduction, blood coagulation, hormone secretion and other physiological functions. Especially for women, the metabolism and demand for calcium exhibit significant stage specific characteristics due to multiple factors such as physiological cycles, pregnancy and lactation, and hormonal changes during menopause. Scientific and rational calcium supplementation is not only a key measure to prevent osteoporosis, but also an important health management strategy throughout the entire life cycle. This guide systematically outlines the calcium nutritional needs, dietary sources, supplementation recommendations, absorption influencing factors, and common misconceptions of women at different stages of life, aiming to help women establish evidence-based calcium intake cognition, achieve scientific connection from daily diet to necessary interventions, and effectively safeguard bone health and overall health.