First came kale, championed by the likes of Gwyneth Paltrow and used in everything from smoothies to crisps.
And while the trend for eating your greens shows no signs of slowing, supermarkets' latest offerings might raise a few eyebrows.
Waitrose in the United Kingdom is to start selling fresh seaweed, gathered from the sea off the coast of Cornwall, on its fish counters.
Meanwhile Asda is to stock bags of broccoli leaves - which would normally be thrown away. The chain says selling the "delicious" greens will help eliminate 4,000 tonnes of waste a year.
The Kombu variety of seaweed to be stocked in Waitrose is harvested by a small supplier called The Cornish Seaweed Company. It normally provides the leaves to top restaurants, but shoppers will now be able to try cooking with them at home.