We all know it's important to eat our greens (and vegetables of any other colour), but did you know that some vegetables are more valuable than others when it comes to protecting our health and powering our bodies? With the help of an expert nutritionist, we've unpacked the contribution each vegetable makes to a healthy balanced diet and unearthed the factors that restrict their impact. Read on to discover which are most dense with essential nutrients – and which are pretty pointless.

Click or scroll through our gallery to discover the best and worst vegetables according to experts – counting down to the one with the least nutritional value.

We've based our ranking on the health-boosting credentials of each vegetable, with input from a registered nutritionist.