Influence of microwave processing on nutritional, anti-nutritional, antioxidant and sensory characteristics of kachnar powder and supplemented flatbreads

Abstract

This study examines the impact of microwave processing on Kachnar (Bauhinia variegata) powder and its application in flatbreads. Microwave treatment reduced anti-nutrient levels of alkaloids, phytates, tannins, and saponins by 83–90 %, enhancing safety. Incorporation of microwaved kachnar powder (MwKP) into flatbreads at 2.5–10 % replacement levels improved nutritional profiles, with increases in ash (0.4–0.9 g/100 g), dietary fiber (2–3 g/100 g), protein (8–9 g/100 g), and minerals such as Fe (3–4 mg/100 g), Zn (3.2–3.9 mg/100 g), Na (3–10 mg/100 g), K (378–388 mg/100 g), Ca (30–45 mg/100 g), and Mg (125–145 mg/100 g). Antioxidant activity also increased significantly (p < 0.05) as measured by DPPH, ABTS, FRAP, and total phenolic and flavonoid contents. Sensory evaluation showed a decline in acceptability for MwKP levels ≥7.5 %, though 5 % supplementation was well-received. The findings suggest that microwave processing is an effective method for reducing anti-nutrient content in Kachnar while improving its nutritional and antioxidant properties, making it a viable ingredient for enhancing baked goods.