The embryo and bran parts of giant embryo mutant TNG71-GE were found to be good sources of vitamin E and γ-oryzanol. Therefore it could be used to produce high-value by-products from milled embryo and bran parts and as a genetic resource for rice improvement programmes. TNG71-GE can also be used as a nutrient-fortified rice cultivar.

The brans of M-18, M-50 and M-56 are good sources of proanthocyanidins, vitamin E and γ-oryzanol, respectively, while the bran of M-54 is rich in Fe. Thus these mutants could be used to produce high-value phytochemicals or Fe byproducts from bran during rice grain milling or as genetic resources for rice improvement programs.

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Chemical compositions and anti-oxidative characteristics of non-fermented and fermented beverages and associated solid by-products produced from freeze-dried sweet potato roots were examined. Freezedried roots of purple-fleshed variety Quandow had higher total phenolics (9.32 mg g Fermented and non-fermented beverages and solids produced from Quandow also had higher antioxidants contents and greater antioxidant activities than those produced from Tainung 66. Thus, producing non-fermented or fermented beverages from purple-fleshed variety Quandow has commercial potential and this will increase its economic value. The purple-fleshed variety Quandow also produced high carbohydrate or high protein solid by-products enriched with antioxidants during beverage processing, which may be used as dietary carbohydrate supplements (non-fermented solids) or high protein animal feed (fermented non-alcoholic solids).