The Top Leading Manufacturer of Green Tea Extracts in China. NUTRAMAX?s Hunan Factory are the major manufacturer and the regular suppler of the green tea extracts & herb extracts and for such companies as Unilever, Coca-cola, P&G, Shaklee and Roche internationally through directly or indirectly trading and partnership. NUTRAMAX?s Hunan Factory have been producing and exporting such products as Green Tea Extracts, Instant Tea Series , Natural Botanic Extracts Series to the United States, ...