Which vegetables should I eat to get the most nutrients?

There is no good answer to this question because the health benefits of vegetables are so complex and not completely understood. For example, although iceberg lettuce has very little nutritional value, there is evidence that lettuce can help to fight cancer because it has other compounds that aren’t nutrients but that are related to health. Likewise, spinach is a poor source of calcium compared to other leafy greens like collards and kale, but spinach is a rich source of a compound called lutein, which protects against cataracts and other vision problems. So the key to taking advantage of the health benefits of vegetables is definitely to eat a variety of them. If I had to choose the nutritional stars among vegetables, I would say that the leafy green family—kale, collards, turnip greens, mustard greens—are certainly super sources of many healthful things. They are rich in calcium, vitamin A (in the form of beta-carotene), vitamin C, folate, and a number of compounds that fight cancer and heart disease. So do try to include these vegetables in your diet often. But again, eat a variety of vegetables and eat them a lot!