Organoleptic quality and antioxidant levels kefir derived from goat milk with the addition of different levels of red dragon fruit (hylocereus polyrhizus) juice. JPLTrop [Internet]. 2022 Mar. 31 [cited 2026 Aug. 27];5(1). Available from: http://e-journals2.unmul.ac.id/index.php/jpltrop/article/view/5185