Seaweed as a Food Source

Seaweed as a Food Source - Giant Kelp
Giant Kelp

God has given us a food source that so far humans have been unwilling to tap – seaweed. It is super fast growing, with some species like giant kelp growing 50 centimeters a day. Seaweed doesn’t need land or pesticides and doesn’t have to be watered. Furthermore, it is packed with protein, fiber, vitamins, minerals, and other nutrients. With over 800 million people starving worldwide, one answer might be seaweed as a food source.


Oceans cover roughly two-thirds of our planet, yet they contribute less than three percent of humans’ total food calories. Asian recipes have used seaweed for centuries, and its cultivation is limited mainly to Asia — large areas of the sea could be seaweed farms. There are 12,000 different types of seaweed, and humans have only learned how to cultivate fewer than 30.


Dried seaweed retains its nutrients and has a long shelf life, so it doesn’t have to be refrigerated or frozen. The reluctance to use seaweed as a food source has primarily come from misconceptions about it. Many of us have only seen water plants growing in a freshwater pond and have no idea what ocean-grown seaweed is like. In addition to food and the replacement of environmentally polluting agents, seaweed can be a significant carbon sink, absorbing massive amounts of carbon dioxide.


Seaweed can also be used as a natural fertilizer for land plants and as feed for animals. It can even be a cotton alternative in textiles and, in some cases, as a biodegradable replacement for plastics. Like most human problems, the solution is there, but we aren’t using all of the wealth of resources God has given us. One solution God has provided may be seaweed as a food source and more.

— John N. Clayton © 2023

Reference: Opinion article by Vincent Doumeizel on cnn.com

Seaweed as a Natural Resource

Seaweed as a Natural Resource
Sea Grapes (Aulerpa lentillifera)

The summer issue of the Nature Conservancy magazine contains an interesting article about the value of seaweed. Overfishing, pollution, ocean acidification, and global warming combine to make life difficult for people living in coastal areas who depend on fishing. The use of seaweed is a solution to much of this, and researchers are making significant progress in advancing seaweed as a natural resource.

Growing food in the ocean is more efficient than raising it on the land. There is no need to worry about water or fertilizer because seawater has all the nutrients needed. There are collateral benefits as well since many marine species depend on seaweed to reproduce.

Companies extract carrageenan from seaweed and use it in the production of cosmetics, foods, and medicines. More than 25,000 people are employed in farming seaweed in Tanzania, and extensive training programs are teaching local farmers how to farm seaweed in their coastal waters. 

There is reason to be optimistic about the future. We are learning to use all that God has given us to radically increase our food production, and the work of farming the ocean is leading the way. Not only does seaweed provide food directly to humans, but it can be dried and used as food for cattle, sheep, and goats. Seaweed also helps the planet by reducing the carbon dioxide in the air and increasing the oxygen content. 

The diversity that God has built into the creation allows us to overcome the problem of feeding a growing population while finding ways to reduce pollution. Seaweed as a natural resource demonstrates once again that creation is not a cosmic accident but designed for advanced human life. 

— John N. Clayton © 2021

Reference: nature.org