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What is Sea Moss (Irish Moss)?
The adaptogen and nutraceutical making waves in wellness
You’ve likely come across videos and social media posts singing the praises of sea moss. But what is it, and why is everyone diving in?
Most marine seaweeds are a valuable food source that are low in fat and contain several bioactive compounds that benefit the body. Sea moss, specifically the red algae species
Chondrus crispus (Irish Moss) is just as beneficial. This special combination of dense nutrition and preventive care compounds is what makes sea moss more than an adaptogen. Sea moss is also a nutraceutical.
How is Sea Moss Harvested?
Sea moss is harvested from the ocean and is inherently organic. Aquaculture, which is the raising and harvesting of water organisms, accounts for about 97% of all sea moss production. Harvest methods can be as selective as hand-cutting or large-scale scale bottom trawling.
What is Inside Sea Moss?
When in its fresh state, sea moss is roughly 80% water. Without water, its composition breaks down to:
Polysaccharides - Over half of sea moss’s dry weight is polysaccharides, the biological polymer that provides its jelly structure.
Proteins - Another 10% of its dry weight contains essential amino acids, including taurine, which is rare in plant-based sources and vital for muscle and nerve function.
Minerals - 15% of sea moss’s dry weight are minerals. While many tout that sea moss contains "92 of the 102 minerals" the body needs,” mineral composition varies. It is scientifically verified that sea moss is exceptionally rich in iodine, potassium, sodium, calcium, magnesium, and iron.
Vitamins
- Sea moss contains vitamins A, C, E, K, and B-complex vitamins (notably B9/Folate and B2/Riboflavin).
Bioactive Compounds - Rich in polyphenols, flavonoids, and tannins, which provide antioxidant properties.
What does Sea Moss do for the Body?
Most current "proof" for sea moss’s benefits comes from studies on seaweed in general or animal/in-vitro models. Human clinical trials specifically for Chondrus Crispus (Irish Moss) are limited but promising.
Thyroid Health - Sea moss is one of the best natural sources of iodine. Iodine is the raw material used by the thyroid to produce hormones that regulate metabolism.
Gut Health / Prebiotic - The carrageenan and other fibers act as prebiotics, feeding beneficial gut bacteria (Bifidobacterium). This can improve digestion and immune response.
Immune Support - Studies in model organisms (like C. elegans) show sea moss extracts can enhance host immunity and suppress certain harmful bacteria like Salmonella.
Muscle Recovery - Anecdotal evidence suggests that sea moss’s high content of taurine and magnesium supports muscle repair and electrolyte balance after physical exertion.
Skin Health - Researchers are interested in what happens when sea moss is applied to the skin. Its citrulline-arginine content can improve cell growth and metabolism, potentially protecting the skin barrier.
Hydration - Fresh sea moss will quickly rehydrate the body while also delivering an abundance of minerals, vitamins, and proteins.
Source Citations
David, Lauren. “Sea Moss Has Become a Billion-Dollar Health Trend. Is It Worth the Hype?” Health, 8 Apr. 2025, www.nationalgeographic.com/health/article/sea-moss-health-benefits-effects.
Lomartire, S., Marques, J. C., & Gonçalves, A. M. M. (2021). An Overview to the Health Benefits of Seaweeds Consumption. Marine Drugs, 19(6), 341.
https://doi.org/10.3390/md19060341
Lotze, Heike K., Milewski, Inka, Fast, Julia, Kay, Lauren and Worm, Boris. "Ecosystem-based management of seaweed harvesting"
Botanica Marina, vol. 62, no. 5, 2019, pp. 395-409. https://doi.org/10.1515/bot-2019-0027
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