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Writer's picturePrabha Honrath, RD

Sea Moss The Hype vs. The Evidence

Sea moss, or Chondrus crispus (also known as Irish moss), is a red seaweed that has gained significant popularity, especially on social media. With influencers and celebrities promoting its benefits, many are turning to this supplement for claims ranging from improved digestion and weight loss to better thyroid health and even anti-aging properties. But before jumping on the sea moss bandwagon, it’s important to take a closer look at what the science says—and what it doesn’t.



Sea Moss The Hype vs. The Evidence

Sea moss is often labeled as a “superfood” or “functional food” because of its rich nutrient profile. It contains essential vitamins, minerals like iodine and magnesium, proteins, and dietary fiber. While these nutrients can certainly support overall health, the claims of sea moss as a miracle cure or a way to stay "forever young" are not backed by strong scientific evidence.



Currently, research involving sea moss and its benefits is limited to studies on cells or animals, with very little clinical research involving humans. This makes it difficult to definitively say whether sea moss supplements offer the wide-ranging health benefits that are often advertised. Additionally, dietary supplements, including sea moss, cannot be marketed as treatments for diseases like diabetes, despite some suggestions otherwise.






The Risks of Sea Moss Supplements

While sea moss can offer micronutrient benefits, there are risks associated with its use, especially in supplement form. One key concern is the varying nutrient composition of sea moss, which can change depending on the environment in which it’s grown. For example, iodine levels in seaweed like sea moss can sometimes exceed the recommended safe limits, leading to potential iodine poisoning or thyroid issues.



Furthermore, toxic substances such as arsenic, mercury, and lead have been detected in some seaweed products grown in contaminated waters. This highlights the importance of being cautious when choosing a sea moss supplement.








How to Choose a Safe Sea Moss Supplement

If you decide to include sea moss in your diet, it's crucial to ensure you're using a high-quality product. Look for supplements that specify the type of seaweed used (such as “Irish moss” or “Chondrus crispus”) and have been tested for heavy metals. Opt for products that have third-party certifications, which verify the supplement's purity and safety.


As always, consult with a healthcare provider before starting any new supplement, especially if you’re pregnant, breastfeeding, or have an existing thyroid condition.




The Bottom Line

Sea moss is a nutrient-rich seaweed that could potentially offer some health benefits, particularly as a source of micronutrients. However, it’s important to be mindful of the limited scientific evidence supporting many of the health claims around sea moss, as well as the risks associated with inconsistent nutrient levels and potential contamination. If you do choose to use sea moss, make sure you opt for a responsibly sourced supplement and consult with your healthcare provider to ensure it’s safe for you.

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