Guwahati, March 9 -- Aisling Pigott, Cardiff Metropolitan University

The more plants you include in your diet, the more health benefits you'll notice. This is why public health guidelines have long encouraged people to eat at least five servings of fruits and vegetables per day.

But the 30-plants-a-week challenge circulating online suggests that, instead of only aiming to eat five servings a day, we should instead aim to eat 30 different plant foods per week to improve our health. Fruits, vegetables, legumes, nuts, seeds, wholegrains, herbs and spices would all count as a plant serving.

Some advocates of the approach have even created some ground rules and have generated a points system that gives a point to each different type of plan...