Faridah A, Holinesti R, Syukri D. Betalains from Red Pitaya Peel (Hylocereus polyrhizus): Extraction, Spectrophotometric and HPLC-DAD Identification, Bioactivity and Toxicity Screening. Pak. J. Nutr. [Internet]. 2015 Nov. 15 [cited 2025 Aug. 26];14(12):976–982. Available from: https://pjnonline.org/pjn/article/view/2250