Supporting Information An injectable and physical levan-based hydrogel as a dermal filler for soft tissue augment Won Il Choi †a , Youngmin Hwang †b , Abhishek Sahu b , Kiyoon Min b , Daekyung Sung a , Giyoong Tae *b , Jeong Ho Chang *a a Center for Convergence Bioceramic Materials, Convergence R&D Division, Korea Institute of Ceramic Engineering and Technology, 202, Osongsaengmyeong 1-ro, Osong-eup, Heungdeok-gu, Cheongju, Chungbuk 28160, Republic of Korea. b School of Materials Science and Engineering, Gwangju Institute of Science and Technology, 123 Cheomdan-gwagiro, Buk-gu, Gwangju 61005, Republic of Korea * To whom the correspondence should be made E-mail: gytae@gist.ac.kr / Phone: 82-62-715-2305 / Fax: 82-62-715-2304 E-mail: jhchang@kicet.re.kr / Phone: 82-43-913-1501 / Fax: 82-43-913-1597 1 These authors contributed equally to this paper. Keywords: Levan; Hyaluronic Acid; Hydrogel; Dermal filler; Wrinkle １ Electronic Supplementary Material (ESI) for Biomaterials Science. This journal is © The Royal Society of Chemistry 2018