Tannin is complex chemical substances that are derived from phenolic acids.
According to Coherent Market Insights "The global tannin market is expected to grow significantly during the forecast period. The increasing demand from the various end-use industries such as leather, wine, and wood adhesives is the major driving factor for the growth of the tannin market". Have you ever had an astringent (dry, puckery) sensation in your mouth after biting into an unripe apple? You've had tannin before. Tannins are chemical compounds made up of phenolic acids (sometimes called tannic acid). They're called phenolic compounds, and they're found in a wide range of plant species from all climates and places of the world. They're big molecules that bind to proteins, cellulose, carbohydrates, and minerals easily. These chemicals are insoluble and resistant to decomposition as a result of the process. Tannin is found in a variety of coniferous tree species as well as blooming plant families. The tannins in the plants can leach out. The tannin-ric...