Dairy powder enriched with a soy extract (Glycine max): Physicochemical and polyphenolic characteristics, physical and rehydration properties and multielement composition

•The increase of soy extract in the dairy compounds increased the polyphenols content.•The dairy compound showed the highest bioactive compounds, using 49 % of soy extract.•Soy powder extract generated dairy compounds with significant amounts of Fe and Mn.•Dairy compounds density and fluidity were affected by the soy powder extract addition.•Dairy compounds rehydration was affected by the soy powder extract addition.