This study investigated the antioxidant, whitening, and anti-obesity properties of red-fleshed pitaya extracts. We aimed to increase the financial value of red-fleshed pitaya and demonstrate its potential as a functional food material in the future. Flesh and peel extracts were obtained using 70% ethanol and water extraction conditions. Total polyphenol content and antioxidant activity (ABTS and DPPH radical scavenging activity) for each extract were measured, and the 70% ethanol peel extract had the highest total polyphenol content and antioxidant activity. Mushroom tyrosinase inhibitory activity was used to measure the whitening effect, with the water flesh extract being the most effective. To investigate the anti-obesity effect, a 3T3-L1 preadipocyte differentiation experiment was performed at a non-cytotoxic concentration using 70% ethanol and water flesh extracts. In comparison to the control, the water flesh extract showed a substantial decrease in lipid accumulation in a dose-dependent manner. The antioxidant activity of the 70% ethanol pitaya peel extracts and the whitening and anti-obesity effects of the water flesh extracts are expected to make pitaya a highly valuable functional food ingredient.

Abstract
서 론
재료 및 방법
    실험재료
    적색종 용과 추출물 제조
    총 폴리페놀 함량 측정
    ABTS 라디칼 소거능 측정
    DPPH 라디칼 소거능 측정
    타이로시나제(tyrosinase) 활성 저해 효과 측정
    3T3-L1 지방전구세포 배양 및 세포독성
    3T3-L1 지방전구세포 지방분화 및 oil-red O 염색
    통계처리
결과 및 고찰
    총 폴리페놀 함량
    항산화 활성
    타이로시나제(tyrosinase) 활성 저해 효과
    항비만 효과 측정
요 약
References

• 이린아(제주특별자치도 농업기술원) | Rina Lee (Jeju Special Self-Governing Province Agricultural Research and Extension Services, Seogwipo 63556, Korea)
• 이정민(제주특별자치도 농업기술원) | Jeongmin Lee (Jeju Special Self-Governing Province Agricultural Research and Extension Services, Seogwipo 63556, Korea)
• 이현주(제주특별자치도 농업기술원) | Hyeonju Lee (Jeju Special Self-Governing Province Agricultural Research and Extension Services, Seogwipo 63556, Korea)
• 오명협(제주특별자치도 농업기술원) | Myunghyup Oh (Jeju Special Self-Governing Province Agricultural Research and Extension Services, Seogwipo 63556, Korea) Corresponding author