Subagiyo, A., Afdhal, A.F. and Derriawan, D. 2020. The influence of product upgrading and quality on customer satisfaction and its impact on consumer loyalty standardized herbal medicine: Research on Tolak Angin Sido Muncul Product in DKI Jakarta. International journal of health & medical sciences. 3, 1 (Dec. 2020), 136-145. DOI:https://doi.org/10.31295/ijhms.v3n1.330.