Details

Autor(en) / Beteiligte

• Ademiluyi, Adedayo O.
• Aladeselu, Olubukola H.
• Oboh, Ganiyu
• Boligon, Aline A.

Titel

Drying alters the phenolic constituents, antioxidant properties, α‐amylase, and α‐glucosidase inhibitory properties of Moringa (Moringa oleifera) leaf

Ist Teil von

• Food science & nutrition, 2018-11, Vol.6 (8), p.2123-2133

Ort / Verlag

United States: John Wiley & Sons, Inc

Erscheinungsjahr

2018

Link zum Volltext

Quelle

Wiley HSS Collection

Beschreibungen/Notizen

• Moringa oleifera leaf is a popular green leafy vegetable which has found its usefulness in the preparation of traditional stews and soups. Like most green leafy vegetable which are not around year‐round, the leaf is usually dried and pulverized for storage and easier handling, and despite the popularity of this processing technique, there is dearth of information on how drying affects the health‐promoting properties of the leaves. Hence, this study sought to investigate the effect of some drying methods (freeze‐drying, sun, air and oven drying) on the phytoconstituents, antioxidant properties, and biological activities of moringa leaf. This study revealed that drying methods significantly altered the phytoconstituents (phenolics, flavonoids, vitamin C, tannin, saponin, phytate, oxalate, alkaloid, cardenolides, and cardiac glycosides), antioxidant capacities (reducing power, Fe2+chelating, ABTS•+, DPPH, and •OH scavenging abilities), and enzyme inhibitory (α‐amylase and α‐glucosidase) effects of the leaf, with freeze‐drying being the most promising method for preserving the nutraceutical properties of moringa leaf. However, for practical application, the order of preference of the drying methods which ensures adequate retention of phytoconstituents and possibly biological activities of the leaf as observed in this study is freeze‐drying > air drying > sun drying > oven drying, in the order of decreasing magnitude. This study sought to investigate the effect of some drying methods (freeze‐drying, sun, air, and oven drying) on the phytoconstituents, antioxidant properties, and biological activity of moringa leaf. This study revealed that drying methods significantly altered the phytoconstituents (phenolics, flavonoids, vitamin C, tannin, saponin, phytate, oxalate, alkaloid, cardenolides, and cardiac glycosides), antioxidant capacity as well as α‐amylase and α‐glucosidase inhibitory effect of moringa leaf, with freeze‐drying being the best method for preserving the nutraceutical properties of moringa leaf. However for practical application, the order of preference of the drying methods which ensures adequate retention of phytoconstituents and possibly biological activities of moringa leaf as observed in this study is freeze‐drying > air drying > sun drying > oven drying, in the order of decreasing magnitude.