In the realm of biochemistry and nutritional science, the significance of amino acids and their derivatives cannot be overstated. Among these, d,l-α-ketoisoleucine, specifically in its calcium salt form, offers unique properties and potential applications that warrant closer examination. This article delves into the chemical composition, biological significance, potential health benefits, and applications of d,l-α-ketoisoleucine calcium, providing a comprehensive overview of this intriguing compound.