Nutraceutical formulations combining Limosilactobacillus fermentum, quercetin, and or resveratrol with beneficial impacts on the abundance of intestinal bacterial populations, metabolite production, and antioxidant capacity during colonic fermentation

•Nutraceutical formulations with L. fermentum, quercetin, and resveratrol were prepared.•The formulations impacted the abundance of distinct intestinal bacterial populations.•The formulations had positive prebiotic indexes during colonic fermentation.•Tested formulations increased the antioxidant activities in colonic fermentation media.•Tested formulations remodeled metabolite production during colonic fermentation.