Catechin sulphates

Hackett AM, Shaw IC, Griffiths LA. 3t(9-methyl-(+)-catechin glucuronide and 3t 0-methyl-(+)-catechin sulphate New urinary metabolites of (+)-catechin in the rat and the marmoset. Experimentia 1982 38(5) 538-540. 

Tea flavonoids, or tea extracts, are increasingly being added to foods. However, interactions with food and drink components remain unclear, and thus need to be carefully assessed in order that the full potential benefits from consuming tea, in whatever form, can be achieved. Meanwhile, tea catechins themselves undergo extensive O-methylation, glucuronidation, sulphation and ring fission... 

It is well known that repair of tissues damaged as a result of inflammation, a consequence of many varied insults, requires cross-linking and extracellular repair and maturation of collagen and elastin. Since enzymes responsible for this, lysyl oxidases, are copper-dependent [568-572], this aspect of wound or tissue repair assumes particular significance. Lysyl oxidase activity is induced in copper-deficient chickens with copper(II) sulphate [571], and (+ )-catechin... 

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