Setiasih, N. L., Lusiana, L., Inayatullah, S., Firmansyah S., H., Widjaja, L., & Lahirin, R. (2026). Oral Collagen and Glutathione Supplementation for Skin Health: A Systematic Review. Indonesian Journal of Global Health Research, 8(6), 1219–1230. https://doi.org/10.37287/ijghr.v8i6.2824