Spinach, kale, and Swiss chard are rich in iron, which is essential for producing hemoglobin, the protein in red blood cells that carries oxygen.
Beets are high in nitrates, which the body converts into nitric oxide. Nitric oxide helps improve blood flow and oxygen delivery to tissues.
Fish like salmon, mackerel, and trout are rich in omega-3 fatty acids. It has anti-inflammatory properties and can support lung function.
Blueberries, strawberries, and raspberries are packed with antioxidants. They can protect lung tissues from damage caused by free radicals and inflammation.
Although protein supplements help in building muscle mass, they also lead to weight gain if consumed in excess.