The healthiest mushrooms have high levels of antioxidants and beta-glucans, which help support the immune system and protect the body against age-related disease. To receive the most benefits from these mushrooms, it is important utilize them for several weeks and some as an ongoing daily supplement. This is because the mushrooms' compounds build up in the body over time. So it's best to use supplements on a consistent basis, such as taking two tablespoons of mushrooms daily

Citrus fruits are an excellent source of vitamin C, which can boost the production of nitric oxide in the body. Instead of using butter in cooking, you should substitute it with olive oil, which is low in saturated fat and has polyphenols that improve blood flow and reduce inflammation. Another great source of nitric oxide is green tea, which contains high levels of nitrate, which can improve the body's ability to absorb oxygen. Grapefruit juice is a great source of vitamin C and potassium, as well as antioxidants.