The catechin contents of the processed tea products from the ordinary green coloured and purple coloured tea cultivars were
determined by HPLC using pure catechin standards (Table 5). Catechins that are normally present in the green leaf coloured tea plants were also present in the purple coloured tea cultivars namely; epigallocatechin (EGC), catechin (+C), epicatechin (EC), epigallocatechin gallate (EGCG) and epicatechin gallate (EGC) (data not shown).