The Winner is Broccoli
Broccoli is a cheap vegetable with an average price of $1.64 per head, and it provides some of almost every nutrient that you need. It’s particularly rich in vitamin C, which acts as an antioxidant and may boost your immune system. Just one cup provides 135% of your daily needs. Additionally, it’s rich in vitamin K and folate, both of which play a role in blood clotting and preventing certain neural tube birth defects. Studies show that the nutrients and antioxidants in broccoli may help prevent chronic illnesses such as cancer and heart disease (5Trusted Source, 6Trusted Source).