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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. 2015, 14 (12), 976–982. https://doi.org/10.3923/pjn.2015.976.982.