Bioflavonoids being flavonoids for use as a dietary supplement; bioflavonoids from lemons other citrus varieties, being flavonoids and other citrus compounds for use as a dietary supplement; lemon bioflavonoids including flavonoids eriocitrin, eriodictyol, hesperidin being flavonoids for use as a dietary supplement; bioflavonoids, citrus derivatives, citrus concentrates, food herbs and powders for use as nutritional supplements; Dietary supplements containing postbiotics for microbiome support