Abstract
Vernonia amygdalina Del leaf meal (LM), leaf protein concentrates (LPC) and LPC fibre residues (LR) were characterised and the biological activity of LPC was studied. Five infant weaning foods based on V. amygdalina -LPC (VALPC) were compared with three coded commercial infant weaning foods in a 4-week feeding trial using rats as animal model. The LM contained 318.2±2.11 g kg −1 crude protein and this increased by 38.5% to 517.4±1.20 g kg −1 in LPC. Also, the LM contained 96.0±1.8 g kg −1 crude fibre and this decreased by 81.25% to 18.0±1.1 g kg −1 in LPC. The gross energy in the LM (1.56 MJ kg −1 ) increased by 17.9% to 1.90 MJ kg −1 in LPC. The LPC contained higher Na, Ca, Mg, K and Fe than either the LM or LR, while fractionation reduced phytin and tannin contents. Rats fed solely on VALPC lost weight in the biological activity trial. Rats fed 25% VALPC+75% soybean meal (SBM) combination had the highest final weight (FW), while rats fed CFN, a coded commercial food, had the smallest. It was concluded t...
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