Insights & Discussion
Co-fermentation of Ganpu tea with Chachi peel alters its chemical profile, reducing certain compounds while increasing others, thus enhancing its unique flavor.
In the research, the effects of Chachi peel cofermentation on the chemical profile of Ganpu tea were examined using an ultra-high-performance liquid chromatography-Q Exactive Orbitrap mass spectrometry (UHPLC-QE Orbitrap MS)-based qualitative and quantitative method combined with multivariate analysis. A total of 171 compounds were identified using a three-level strategy, including seven phenolic acids, 11 flavan-3-ols, and 27 flavonoids and flavonoid glycosides identified in pu-erh tea for the first time.
The principal component analysis (PCA) of untargeted metabolomics and orthogonal partial least squares discriminant analysis (OPLS-DA) models of targeted components revealed significant differences in the chemical profiles between raw pu-erh tea and Ganpu tea. The cofermentation process significantly reduced the total contents of phenolic acids, flavan-3-ols, and flavonoid aglycone. However, most of the quercetin glycosides, myricetin glycosides, and vitexin increased significantly. Additionally, hesperidin, a flavonoid glycoside only found in Chachi, was detected in pu-erh tea for the first time after cofermentation.
Hence, this process clearly impacts the chemical composition and content changes in pu-erh tea, suggesting that cofermentation accelerates the fermentation of pu-erh tea and improves its unique taste.
Discover Related Insights
Ganpu tea, derived from Pu-erh tea and the pericarp of Chachi, enhances antioxidant capacities and modulates gut microbiota beneficially more than Pu-erh tea alone.
2020 Nutrients Chemical Profile, Antioxidative, and Gut Microbiota Modulatory Properties of Ganpu Tea: A Derivative of Pu-erh Tea Zheng Y, Zeng X, Chen T, Peng W, Su W
Network Pharmacology Antioxidant Gan Pu Tea Gut Microbiota
A thorough chemical analysis was conducted on hot-water extracts of Ganpu tea using ultra-high performance liquid chromatography and quadrupole-time-of-flight tandem mass spectrometry, which identified a total of 92 constituents. Considering the antioxidant properties of Ganpu tea, an experiment was designed and carried out where rats were fed with Ganpu tea over a long period. The same experiment was done using Pu-erh tea and the pericarp of Chachi separately, allowing for comparisons of antioxidant capacities between them and Ganpu tea.
The results showed that Ganpu tea had a substantial impact on improving the activities of superoxide dismutase and glutathione peroxidase, both essential antioxidants, more than Pu-erh tea. This indicated a superior antioxidant capacity of Ganpu tea. Further, it significantly increased the abundance of specific gut bacteria, offering a suggestion of the potential benefits of Ganpu tea in human gut microbiota modulation. The results underscore the health benefits of Ganpu tea in enhancing antioxidant activities and promoting beneficial gut microbiota.