Combining antioxidants and processing techniques to improve oxidative stability of a Schizochytrium algal oil ingredient with application in yogurt

Oxidative instability limits incorporation of o3-3 fatty acids (FAs) into some products. This research combined processing techniques with antioxidant addition to overcome these barriers. Oleogels, microencapsulates, and microencapsulated gel ingredients were prepared using Schizochytrium spp. algal oil (AO) in combination with a, 13, y, and 8 tocopherols or 1-o-galloylglycerol (GG) as antioxidants. Ingredients were tested for physicochemical stability and optimal ingredients were selected to prepare yogurts as a model food with ideal matrix. Yogurts were analyzed for physicochemical properties. After 24-days storage at 4 degrees C, yogurt containing microencapsulated oleogel with GG as antioxidant exhibited average peroxide and p-Anisidine values of 7.17 mmol O2/kg of oil and 118.85 abs/g, respectively. These values were similar to store-bought yogurt using saturated fat source, with values of 6.83 mmol O2/kg of oil and 117.95 absorbance/g, respectively. These results could lead to incorporation of o3-3 FAs into foods, cosmetics, and pharmaceuticals in the future.

Automated summary

This research overcame the oxidative instability of o3-3 fatty acids (FAs) by combining processing techniques with antioxidant addition. The resulting microencapsulated oleogel with 1-o-galloylglycerol (GG) as antioxidant showed similar physicochemical properties to store-bought yogurt using saturated fat source. These findings could pave the way for incorporating o3-3 FAs into a variety of products in the future.