Rheological, functional properties, and stability of peach puree added with normal and high amylose retrograded starches

Abstract

Texture-modified foods have become a growing trend in the market and retrograded starch can enhance the rheological properties of foods. This study assessed the effect of adding 10% (w/w) of normal (RNS) or high amylose (RHS) retrograded starches on the physicochemical and rheological properties of commercial peach puree stored at 4°C. The resistant starch content (RS), syneresis, and rheological behavior were evaluated during 14-day storage. Control puree exhibited high syneresis (60%), low consistency (6 Pa·sn), and decreasing viscosity during storage. These characteristics improved after adding retrograded starches. Samples with RNS exhibited higher viscosity, lower syneresis, lower RS (2%), and poor stability; meanwhile, the systems with RHS exhibited greater stability maintaining their viscosity, syneresis, and RS (10%) relatively constant during storage. Therefore, RHS can be recommended to enhance and maintain the physicochemical, nutraceutical, and rheological properties of a food matrix like peach puree during storage.