Vitamin D plays a crucial role in maintaining bone health, supporting the immune system, and regulating calcium levels. Despite its importance, many people misunderstand how vitamin D is produced and activated in the body. Confusion often arises from inaccurate explanations, such as those mixing up the roles of cholesterol, liver, and kidneys in the process. This post clarifies the true three-step metabolic pathway of vitamin D, explaining each stage clearly and correcting c