The aim of the research is to analyze the influence of viral marketing and customer reviews on purchasing decisions with consumer trust as a mediating variable. In marketing theory, purchasing decisions can be improved by mediating consumer trust, so that products can be sustainable. The study was conducted on Indonesian iced tea products, which are typical tea leaf products from Indonesia. The type of research used in this research is quantitative and analyzed using PLS. 105 respondents in the research were customers of Indonesian iced tea products in Palangka Raya City. The research results show that viral marketing, customer reviews mediated by consumer trust variables had a significant positive effect on purchasing decisions, viral marketing had a significant positive effect on purchasing decisions, viral marketing had a significant positive effect on consumer trust, customer reviews had a significant positive effect on purchasing decisions, customer reviews had a significant positive effect on consumer trust and consumer trust had a significant positive effect on purchasing decisions for Indonesian Iced Tea products in the city of Palangkaraya.