Spirulina, that gooey green stuff that was all the rage with 1990s health fanatics, is big business for an Auckland firm that's one of the world's biggest suppliers.
North Shore-based Lifestream International imports bulk spirulina - algae rich in vitamins and protein and cultivated in ponds - from southern India and the United States.
The company then converts it into powder, capsules and tablets for export and the New Zealand market.
Lifestream general manager Sheldon Midgley said spirulina had a global retail market estimated to be worth more than $300 million.
"The rest of the world is still consuming much more of this [spirulina] than we do down here," he said.