Saputri, D., Cahyani, I.M., Kristantri, R.S., Pebriani, T.H. and Sari, W.K. 2025. Optimization of Propylene Glycol and Na CMC in Gel Serum Preparations of Chicken Bone Collagen Antioxidant (Gallus gallus domesticus). Journal of Food and Pharmaceutical Sciences. 13, 3 (Sep. 2025), 166-174. DOI:https://doi.org/10.22146/jfps.19932.