Quality of Nonfat Yoghurt Made from Skim Milk Powder Reconstituted in Aqueous Extract of Moringa Leaves

Abstract

Moringa leaves have well-known health and nutritional benefits. This work aimed to study the properties of nonfat yoghurt prepared from skim milk powder reconstituted in an aqueous extract of Moringa leaves (MLE). Three nonfat yoghurt treatments were manufactured from three concentrations of MLE 0.5, 1 and 1.5%, which were used to reconstitute skim milk powder (10%). The results showed that, compared with the control, MLE had no effect on the pH value, acidity% or protein content, but increased the TS, ash and mineral contents (Ca, K, Mg and Fe) in nonfat yoghurt treatments. Nonfat yoghurt made with MLE showed higher antioxidant activity (%) than the control. The curd tension and viscosity of the control were higher than those of the applied treatments, but the nonfat yoghurt with MLE exhibited the lowest syneresis compared with the control. Nonfat yoghurt made with MLE at concentrations of 0.5 and 1% was organoleptically acceptable, but treatment with 1.5% MLE had the lowest sensory properties.