crushed and de - fatted oilseed is extracted with water at neutral , mildly basic or mildly acidic ph ; and is filtered . the filter media allows passage of small fragments of solid cell meat into the filtrate . the filtrate is treated with a base to increase ph to over ph 9 , and solids are separated out . protein is separated from other constituents of the liquid and concentrated , for example by heat - induced or isoelectric precipitation and / or ultrafiltration . the remaining liquid is rich in sugars . the process results in one or more protein products suited for human or animal food ingredients or for production of cosmetics , a sugar rich product suitable for fermentation or use as a feed ingredient , and a fiber - protein animal feed ingredient .