Not all “Irish moss” is the real thing. Here’s what Chondrus crispus is, its health benefits, and how to tell real Irish sea moss from look-alikes.
Quick answer: Real Irish moss is Chondrus crispus, a red seaweed that grows in the cool waters of the North Atlantic. Many products sold as Irish sea moss are actually different tropical species from places like Jamaica or Latin America, which tend to be paler with thinner, finger-like fronds. Because they’re hard to tell apart once ground, buying from a transparent, reputable brand is the most reliable way to know what you’re getting.
Read the ingredients in most ice creams, jelly, pudding, or most dairy products and you’ll probably see the ingredient carrageenan listed. Carrageenan comes from Chondrus crispus, or in layman terms, Irish moss. But despite its name, Irish moss (Chondrus crispus) isn’t a moss at all. It’s a type of algae, or seaweed, found along the coast of the Atlantic Ocean in Europe and North America. The red, branching sea plant is mostly made of what is called carrageenan, a jelly-like substance that is used in many foods as an emulsifier.
But besides acting as a vegan alternative to gelatin, Irish moss has several health benefits. However, due to lack of regulations, it’s sometimes difficult to know whether you are getting Irish moss or other types of sea moss when you purchase it from a retailer. Keep reading to learn about the many health benefits of Irish moss and how you can be sure you are getting the real thing.
What Are the Health Benefits of Irish Moss?
Irish moss, like all seaweeds, is rich in iodine, an important nutrient that supports healthy thyroid function. It’s also a source of omega-3 fatty acids, which research links to brain and heart health. People who consume more omega-3s tend to have a lower risk of heart disease, high blood pressure, and high cholesterol. Irish moss has also been studied for its role in healthy blood sugar and for its antioxidant properties.
Irish moss contains a carotenoid called fucoxanthin that has been shown to help support healthy blood sugar levels. Fucoxanthin also acts as an antioxidant that helps neutralize free radicals. Free radicals damage cells over time, which is why researchers are interested in antioxidant-rich foods like Irish moss. You can read more in our benefits of sea moss guide.
How Can You Tell the Difference Between Real Irish Moss and Other Seaweeds?
Sea mosses are types of red seaweed, or algae, and not a true moss at all. They are called sea moss for the way they grow over rocks in a carpet-like fashion. Sea mosses have a frilly, branching appearance and are generally reddish-brown in color. The difference between Irish sea moss and other sea mosses is where it’s grown. Irish sea moss grows in cooler water and is naturally found along the North Atlantic coastlines. It grows especially abundant in Britain and Ireland, hence the name Irish sea moss.
There are several types of sea moss that closely resemble Irish sea moss. These types of sea mosses are often falsely marketed as Irish moss. Many of these sea mosses are grown in the tropics of Jamaica or Latin America and are entirely different species of sea moss. However, it can be difficult to tell these sea mosses apart, especially when they are ground up and packaged. When Irish moss is whole, it has more fanlike fronds whereas tropical sea moss has slenderer, finger-like fronds. Tropical sea moss is also paler than Irish moss. It’s more straw colored while Irish moss tends to have a reddish-brown or even purple color to it. However, this can sometimes be difficult to distinguish when Irish moss is ground up for supplement or dietary use.
How Do You Know What Sea Moss You’re Getting in the Store?
In truth, you don’t always know what you’re getting when you buy sea moss in the store or order it online. Many companies will falsely advertise their products, either knowingly or unknowingly, as Irish sea moss when it’s a different type of sea moss entirely. As a consumer, you need to do your research on health food brands that are reputable to ensure you are getting what you pay for. This is especially true when buying supplements as the supplement industry doesn’t have the same federal regulations as other types of food products.
The only way you can ensure you are getting quality ingredients and supplements is to purchase from a trusted brand. Visit the brand’s website and learn about their story. Make sure they are committed to their customers and stand behind their products and testimonies. Untrustworthy brands may make exaggerated claims with no basis to back them up. A reputable brand will be transparent about their ingredients and manufacturing processes. If a company is evasive about their ingredient sourcing or features vague product labeling, it could be a red flag. Reputable companies will have no problem providing that information to their customers. To ensure your own safety, choose a company that cares about you.
Ancient Bliss Sea Moss is 100% organic, wild crafted Sea Moss sourced in the Caribbean. We don't use any additives or fillers and are made in a GMP-certified facility and third-party tested. You can find our sea moss capsules here or on amazon. Curious about sea moss and iodine? Read sea moss and thyroid health.
Frequently Asked Questions
Is Chondrus crispus the same as sea moss?
Chondrus crispus is the species traditionally called Irish moss. “Sea moss” is a broader term that’s also used for other red seaweeds, including tropical species such as Gracilaria that are often sold as sea moss.
How can you tell if sea moss is real Irish moss?
Whole Irish moss has wider, fan-like fronds and a reddish-brown to purple color, while tropical sea moss is usually paler and straw-colored with thinner, finger-like fronds. Once it’s dried and ground, it’s very hard to tell by sight, so check the label for the species and ask the brand about sourcing and testing.
Does Irish moss contain iodine?
Yes. Like other seaweeds, Irish moss is a natural source of iodine, which supports normal thyroid function. The amount varies by species, harvest location, and batch.
Who should avoid Irish moss?
Because of its iodine content, check with your doctor before taking Irish moss if you have a thyroid condition or take thyroid medication, are pregnant or nursing, or take any other medication. Anyone with a seaweed or iodine sensitivity should avoid it.
What should I look for in a sea moss supplement?
Look for the species on the label, a clearly stated amount per serving, transparent sourcing, third-party testing for heavy metals, and no unnecessary fillers. Ancient Bliss Sea Moss capsules combine organic sea moss with bladderwrack, taken as 2 capsules daily, and are herbalist-formulated.
As with any supplement, check with your healthcare provider before starting sea moss, especially if you’re pregnant, nursing, have a thyroid condition, or take medication.
