whole walnuts close-up in a wooden bowl on a wooden table. a source of omega-3 for the brain. healthy food concept.

agriculture antioxidant autumn background bowl brain brown christmas close closeup concept copy copyspace cracked decoration diet elements food group health healthy heap horizontal husk ingredient kernel kitchen macro natural nut nuts nutshell nutty omega3 ripe season seed shell shells single snack source space table tasty top trace vegetarian walnuts whole wooden