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. 2023 May 31;15(11):2574. doi: 10.3390/nu15112574

Figure 1.

Figure 1

Schematic methods for the preparation of KRGM gintonin. The method uses only edible ethanol and water. KRG extraction first takes place with distilled water for 12 h, 4 to 7 times continuously, to produce KRG extract, which is further processed for KRG product productions, leaving KRGM as a leftover. The KRGM is dried, and then the dry KRGM was refluxed with 70% ethanol for 8 h at 80 °C three times; the air-dried or freeze-dried ethanol extract is about 8% yield of solid content. The resulting powder obtained from the air-dry process was designated KRGM gintonin.