Gamgrin is a white wine but is rich in tannin, commonly found in grape-based red wine which causes the tangy taste. The puckery taste of tannin is known to be effective in preventing heart problems and aging. It should be noted that persimmon wine has a higher content of tannin than grape-based red wine.  Persimmons are effective in relieving hangovers, and the fermentation of this fruit results in a clear white wine with a shade of gold that has a clean aftertaste and does not cause hangovers. Gamgrin is a specialty product of Cheongdo, and it will soon become a high-end wine product to represent Korea.