This research aims to analyze the syntactic functions of derivational suffixes forming adjectives with reference to user reviews of M.A.C Studio Fix Fluid SPF 15 Foundation on Ulta Beauty’s Official Website. In collecting the data, the library research method was applied and supported by note taking techniques. The data findings were analyzed through a descriptive qualitative method in which, to begin with, the data were presented in the form of tree a diagram to analyze the syntactic functions. Furthermore, the analysis is served along with an explanation. In presenting the data, both formal and informal methods were applied. Formally, the data were served in form of a tree diagram and table, then further analysis was described informally. The result shows that from 73 total findings, three syntactic functions of adjectives were found, namely attributive with 29 occurrences (39,73%), predicative with 42 occurrences (57,53%), and postpositive with 2 occurrences (2,74%).