Definition Of tannins
a yellowish or brownish bitter-tasting organic substance present in some galls, barks, and other plant tissues, consisting of derivatives of gallic acid, used in leather production and ink manufacture.
Rooibos tea contains no caffeine and is very low in tannin .
Example Of tannins
Additionally, the content of another product of the phenyl propanoid pathway, tannin , was examined in buckwheat plants.
Another common problem with cedar, redwood and certain other species is a natural resin in the wood called tannin .
Chipped chestnut wood and bark also were used as a source of tannin for the leather industry.
Honeysuckle imparts a raw sweetness with hints of tannin .
If leeching tannin is the problem, a good sealer is the answer.