Evaluation of nutritional composition and technological functionality of whole American Bullfrog (Lithobates catesbeianus), its skin, and its legs as potential food ingredients

•Frog byproducts were source of proteins with all the essential amino acids.•Frog skin and complete frog samples were rich sources in glutamic acid.•Frog skin sample powder is a protein isolate while frog legs are a concentrate.•Unsaturated fatty acids dominated froǵs oil, where oleic acid was the most abundant.•Samples had superior oil absorption an emulsion capacity than other ingredients.