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This study analyzes the strategic role of quality-based marketing models in enhancing the competitiveness of kombucha products, with a specific focus on Rumah SCOBY DBA, produced by the Yayasan Dharma Bintang Akademia. By integrating Total Quality Management (TQM), Quality Assurance (QA), and Quality Control (QC), the research explores how quality-driven frameworks contribute to marketing effectiveness, consumer trust, brand positioning, and sustainable performance in the functional beverage industry. Employing a Systematic Literature Review (SLR) combined with conceptual analysis, the study systematically examined publications from 2015 to 2025 across leading academic databases, focusing on themes of quality management, functional beverage marketing, kombucha production, consumer behavior, and digital strategies. The findings reveal that product quality—characterized by fermentation stability, microbiological safety, and nutritional consistency—serves as the primary driver of consumer purchase intention. Process quality, through standardized SOPs, hygiene protocols, and traceability systems, reinforces credibility, while service quality, including transparent labeling, health education, and digital engagement, strengthens brand trust. Integrating TQM principles into marketing fosters consumer loyalty, differentiates brands in competitive markets, and supports long-term sustainability. This study provides practical guidance for producers, community-based enterprises, and policymakers to adopt quality-driven marketing models, offering a novel conceptual framework tailored to kombucha products and mapping future research directions in functional beverage innovation.

Kombucha is one of the processed products of fermented sugar and tea with a starter mixture ofkombucha culture called SCOBY (Symbiotic Cultures of Bacteria and Yeast). Kombuchafermentation is carried out using yeast and bacteria microorganisms. Pomegranate or often calledpomegranate is a fruit that has quite high antioxidants. The purpose of this study was to determinethe characteristics of pomegranate juice kombucha with variations in concentration andfermentation time which have high antioxidant activity. This study used a factorial randomizeddesign with two factors and two repetitions. The factors used were variations in the percentage ofpomegranate juice (30%, 40%, and 50%) and fermentation time (7 days, 9 days, and 11 days). Thebest chemical and organoleptic analysis based on the highest antioxidant activity was 50%pomegranate juice treatment and 9 days of fermentation time with 71,10% antioxidant activity,total phenol 9,04 GAE/L, reducing sugar 2,45%, total acid 1,35%, pH 3,1 , anthocyanin 53.52%,lightness (L*) 44.72 , redness (a*) 5.15, yellowness (b*) 2.57, fruity aroma 2.27, sour taste 2,85, andfor overall preference 3,49 for the treatment of adding 50% pomegranate juice and 9 days offermentation time. Pomegranate extract able to improve activity of antioxidant for kombucha. 

Kombucha tea is a drink produced through a fermentation process of a mixture of tea and sugar using kombucha culture or also called SCOOBY ( Symbiotic Culture of Bacteria and Yeast) . The basic ingredients for making kombucha tea are granulated sugar solution and tea bags, in this study it was varied using fruit skin. Vitamin C is known as an important antioxidant found in many fruits, including in rujak fruit skin which is often considered waste. The purpose of this study was to determine the levels of vitamin C in kombucha tea fermented from fruit skin waste. This study used qualitative and quantitative methods. The qualitative method uses the Benedict test and the quantitative method uses the calculation of the percentage of vitamin C content using the iodimetric titration method. The results of the qualitative analysis of the Benedict test were positive for vitamin C with a change in the color of the sample solution to green-yellowish and the analysis of the percentage of vitamin C content obtained a result of 2.3124% or equal to 0.23124 mg / 10 mL of sample solution. The vitamin C content of kombucha tea can vary depending on the base ingredients used, fermentation time, and storage temperature.

Kombucha tea is a traditional beverages product manufactured from fermented tea and sugar solutions. Using Acetobacter xylinum sa starter. Kombucha tea has a refreshing sour taste, but the distinctives aroma make kombucha tea less attractives to consumers. Red roses (Rosa damascene) are a source of anthocyanin pigments that have not been widely used.  In addition, to increase the economic value of roses.  Based on research that has been done, red roses contain antioxidants in the form of purplish red anthocyanins.  The purpose of this study was to determine the effect of the type of sugar and the concentration of rose extract on the characteristics of rose kombucha produced.  This study used Completely Randomized Design (CRD). The factors used were the concentration of rose tea (1g/250ml, 2g/250ml, 3g/250ml) and variations in the type of sugar (palm, sand, fine).  The best chemical and organoleptic analysis based on the highest antioxidant activity was the addition of palm sugar and the concentration of the addition of rose tea 1g/250ml with a total phenolic of 10.17mg GAE/L, total dissolved solids (TPT) 11.10%, acidity (pH) 3.86, antioxidant activity 48.28%, vitamin C 11.41%, 13.63% for total sugar, sour taste score 3.06, rose flavor 2.15 and 1.10 for overall preference the addition of palm sugar and the concentration of the addition of rose tea 1g/250ml. Kombucha made from rose extract can be an alternative functional food.

Pharmaceutical biotechnology products in the form of hand washing soap with an active ingredient of telang flower kombucha fermented solution have the potential to inhibit the growth of Staphylococcus capitis, Bacillus cereus, and Pantoea dispersa bacteria. The aim of this study was to formulate and prepare hand washing soap with an active ingredient in a solution of seagrass kombucha fermentation to inhibit the growth of Staphylococcus capitis, Bacillus cereus, and Pantoea dispersa. This research is an experimental laboratory by making 4 hand washing soap preparations, which consist of a hand washing soap base without an active substance. Hand washing soap base added to a solution of fermented butterfly pea flower kombucha at a sugar concentration of 20%, 30%, and 40%. Disc diffusion is a method used to calculate the average diameter of the inhibition zone for the three tested bacterial growth. The research data obtained were analyzed through one way ANOVA and post hoc analysis. The results of the ANOVA test proved that the obtained p value <0.05, which means that there were significant differences in the three treatment groups in inhibiting the growth of the three test bacteria. The post hoc analysis results also proved that 40% concentration was the best concentration in inhibiting the growth of the three tested bacteria, namely 18.34 mm (S. capitis/strong), 16.39 mm (B. cereus/strong), and 13.33 mm (P. disperse/strong).

Telang flower has the potential to inhibit the growth of Candida albicans, Malasezia furfur, Pitosporum ovale, and Aspergilus fumigatus through the kombucha fermentation biotechnology method. The purpose of this study was to determine the antifungal activity of telang flower kombucha at various concentrations of white sugar. The varying concentrations of granulated sugar used in this study were 20%, 30%, and 40% (w/v), each repeated 3 times. The positive control used was kombucha made from green tea. The negative control used was sterile distilled water. The well diffusion method is one of the methods used to test antifungal activity. The fementation of telang flower kombucha has overall antifungal activity. White sugar concentration of 40% kombucha telang flower was the best concentration in inhibiting the growth of fungi as a whole when compared to the concentration of white sugar kombucha telang flower of 20%, 30% and positive and negative controls.