Broccoli (and other green veg)

Broccoli, along with kale, spinach, and green cabbage are some of the most nutrient-dense foods you'll find at the grocery, with free-radical-busting antioxidants, and digestion-promoting fiber, and a whole army of vitamins and minerals. Broccoli's phenolic compounds have been related to a lower risk of a variety of diseases, including Type 2 diabetes, asthma, heart disease, and cancer. They're also high in folate (a natural-occurring folic acid), which is known to be beneficial to heart health and women hoping to conceive.

Plant-based foods like broccoli and kale provide a healthy amount of bone-building calcium and can be a good substitute for dairy products. Low calcium levels increase your risk of stress fractures, especially if you engage in endurance sports, so make sure you get enough calcium in your diet – the NHS recommends 700mg for people per day.