Aim to consume at least two 3-ounce servings of fatty fish weekly.
Fish is rich in B vitamins, potassium and selenium; it's also protein-rich and carb-free. Salmon, sardines, mackerel, albacore tuna and other fatty fish boast high levels of omega-3 fats, which have been found to improve hemoglobin A1c levels—a test that measures your blood sugar levels over a span of 3 months—according to a 2022 review published in Prostaglandins, Leukotrienes and Essential Fatty Acids. Another review, published in Advances in Nutrition in 2020, found that frequent fish intake has been linked to a decreased risk of chronic disease as well as improved mental health. Aim to consume at least two 3-ounce servings of fatty fish weekly.