Monitoring of Melatonin Contents in Nuts, Seeds, and Beans in Gyeonggi-Do
2023
Song, Y.N. | Hong, H.G. | Kwon, Y.O. | Ha, J.O. | Kim, H.J. | Son, M.J. | Park, J.H. | Kweon, B.Y.
Nuts are essential components of a healthy diet as they provide nutritional value and bioactive components. Melatonin, is a hormone secreted from the pineal gland of the brain that prevents oxidative damage in various tissues, and also found in plants. This study presents a validation method for extracting and quantitatively analyzing melatonin in nuts, seeds, and beans in Gyeonggi-do; the method utilized chromatographic techniques and optimized extraction procedures, considering the high oil content of nuts. The average content of melatonin in nuts, seeds, and beans was 1200.83 (409.76–2223.56), 934.83 (454.10–1736.60), and 616.46 (494.70–825.12) pg/g, respectively. Melatonin content was higher in the kernel with pellicle than that in the kernel alone in walnuts and chestnuts. Furthermore, the presence of melatonin was lower in newly harvested walnuts, chestnuts, and peanuts than in those stored after being harvested the previous year.
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