Diah, D., Prahasanti, C., & Rahayu, R. P. (2024). Light Emitting Diodes as a Phototherapy Light Source for Increasing Vitamin D: A Review: http://www.doi.org/10.26538/tjnpr/v8i1.4. Tropical Journal of Natural Product Research (TJNPR), 8(1), 5746-5751. https://tjnpr.org/index.php/home/article/view/3368