Best Sea Moss

Discover how red algae supplements could improve your thyroid function, gut health, and immunity.

Last updated: Dec 27th, 2022
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Best Sea Moss

Chances are, you’ve already eaten sea moss without knowing it. These red algae contain carrageenan, which is used to thicken milk-based foods like sour cream and cottage cheese. In addition to working as a thickening agent, sea moss may have many other health benefits.

Although human testing is scarce, animal testing of sea moss shows that it can help with immunity, gut health, and even fertility. It also contains a ton of vitamins and minerals that could help with heart health, weight loss, and muscle recovery.

You can consume sea moss in its raw form, but supplements are also available in capsules, gummies, powders, and gels. We’ve picked the top six sea moss supplements and provide you with info about their cost, ingredients, effectiveness, and convenience in this guide.

If you don’t have time to read the whole guide, take a look at our recommendations below.

Summary of recommendations

Our Top Picks

Infinite Age Sea Moss Advanced contains a strong trio of safe ingredients for full-body detoxification, increased energy, and mood elevation.

Infinite Age uses quality ingredients like sea moss, bladderwrack, and burdock root. It’s manufactured in a cGMP-certified facility, and all orders are covered by a generous 90-day money-back guarantee.

Sea moss supplement: top considerations

To provide a comprehensive picture of our top picks, we’ve evaluated them based on five essential criteria: cost, ingredients, effectiveness, safety, and convenience. Check out our winners in each category below.


Winner: NutriVein

Our top sea moss supplements range in price from $19.95-$45.00 for a single bottle. When choosing our winner for cost, we also considered dosing, money-back guarantee, subscription options, and shipping.

NutriVein is our winner for cost because you can purchase a 60-day supply for only $19.99. While this isn’t the cheapest per unit price in our guide (Double Wood wins that with a single bottle price of $19.95), NutriVein offers many other cost-effective benefits, including free shipping on all orders. You can also subscribe and save 10% and take advantage of a 30-day money-back guarantee.


Winners: Infinite Age and Double Wood

Many sea moss supplements include other ingredients besides sea moss, including burdock root and bladderwrack. These additions work in synthesis with sea moss to provide many health benefits. However, some consumers may not want these added components.

So our winners for best ingredients are Infinite Age and Double Wood. Infinite Age includes burdock root and bladderwrack for holistic health, especially thyroid function, digestion, and immunity. Our other pick contains only pure sea moss (with trace amounts of cellulose from the capsule). Double Wood provides 1,200mg of Irish sea moss extract per serving, which is the highest dose in this guide.


Winners: Maju and Oweli

An effective sea moss supplement includes ingredients that deliver on its promises. The company must be transparent about what’s included and specify how it might help your overall health.

Maju and Oweli contain ingredients that serve specific functions. Maju contains black pepper extract, known for increasing the bioavailability of other ingredients in a supplement. This means that your body will absorb the supplement’s components quicker. Oweli works well for holistic health but particularly benefits digestion by stimulating good bacteria in the gut. This can help balance your gut microbiome and lead to better regularity and fewer instances of constipation and diarrhea.


Winner: Infinite Age

When shopping for a sea moss supplement, it’s important to pay attention to how a company verifies product safety. This can include how the supplement is manufactured, tested, and formulated. If the company doesn’t mention safety standards, you might want to look elsewhere.

Our winner for safety is Infinite Age. Not only are their sea moss supplements formulated without gluten or gelatin, but they are also manufactured in a cGMP-certified facility. This means that the supplements meet FDA standards for safety and quality. In addition, Infinite Age uses third-party testing to certify the purity of every ingredient and provide a certificate of analysis on every order.


Winner: VivaNutra

The convenience of a sea moss supplement comes down to its potency, ensuring you’re getting the nutrients you need when you need them. Like all supplements, consistency is key when taking a sea moss supplement — you’ll reap those long-term health benefits over time. So, having a potent formula that is easy to take helps ensure continued use.

VivaNutra offers a combination of three ingredients at high doses per serving: sea moss (776mg), bladderwrack (660mg), and burdock root (50mg). This supplement comes in easy-to-swallow capsules, and you only have to take two daily for best results.

How our top recommendations compare

What is sea moss?

Sea moss is known by a few names, including Irish moss and its scientific name Chondrus crispus. This sea vegetable is a type of red algae that grows primarily in the Atlantic Ocean — mostly along the coasts of North America and Europe. Sea moss contains carrageenan, which is a polysaccharide used as a food additive to thicken milk products like ice cream, yogurt, and cottage cheese.

You can purchase raw sea moss, but it is also available as a dietary supplement, generally in capsules, gummies, drinkable powders, and topical or edible gel. Sea moss is high in many vitamins and nutrients, including:

  • Vitamin B2
  • Vitamin B12
  • Calcium
  • Chromium
  • Magnesium
  • Zinc
  • Iodine
  • Antioxidants

Because it is high in minerals and low in calories and fat, sea moss is used as a dietary supplement to benefit overall health. Some supplement companies claim that consuming sea moss can also help with:

  • Immunity
  • Thyroid health
  • Digestion
  • Inflammation
  • Joint health
  • Weight loss
  • Skin issues
  • Heart health
  • Blood sugar
  • Fertility

More scientific research is needed to verify these health claims. While some studies show the health benefits of seaweed, none of these are conducted on humans, and they do not include sea moss specifically. However, customer reviews discuss many of these benefits with consistent use.

How to prepare sea moss

Some stores sell raw sea moss instead of sea moss supplements. If you’re interested in using raw sea moss, you can prepare it for use in cooking.

  1. Wash the sea moss thoroughly.
  2. Soak it in cold water for one day.
  3. Wait for the sea moss to double in size. It may turn white and gummy.
  4. Blend the sea moss and some water until it becomes a thick liquid.
  5. Store it in your refrigerator for up to two weeks.

The resulting gel is sometimes referred to as “vegan gelatin” and can be used in:

  • Smoothies
  • Jams and jellies
  • Soups and stews
  • Sauces
  • Ice cream

Be aware that sea moss gel does have a fishy, earthy smell and flavor. It also has a thick texture that may be unpleasant when consumed in raw form.

You can also use it as a topical gel to help with skin issues, like dry skin or acne. Some people also use it to water plants or make a rejuvenating face mask.

How sea moss supplements work

Sea moss is said to have many healthy qualities. It’s important to know how these algae could impact your body. Remember that many of these health claims aren’t yet shown in clinical studies. They are mostly based on anecdotal evidence and conclusions drawn from sea moss's vitamin and mineral content.

Here are some of the purported benefits of sea moss supplements:

  • Helps with weight loss: Because sea moss is high in fiber, it fills you up quickly. This can keep you from snacking or overeating.
  • Promotes thyroid health: Sea moss is also high in iodine, which your thyroid needs to function well.
  • Improves digestion: Algae generally is a good source of live bacteria that help balance your gut microbiome.
  • Boosts immunity: Sea moss is high in antioxidants and iron, leading to a better functioning immune system.
  • Improves skin issues: Sea moss is high in protein, which is necessary for healthy skin. It can also help skin retain moisture when used topically.

A few scientific studies on sea moss show how it could improve some health issues. Most studies have been conducted on animals, but they show impressive results.

  • Red sea moss was shown to slow the progress of Parkinson’s disease in worms.
  • Another worm study showed that sea moss supplementation boosted immunity.
  • Sea moss was shown to boost gut health in both hens and rats.
  • Another study on rats showed that sea moss boosted the fertility of male subjects.

In addition to sea moss, these supplements typically include other ingredients that are said to complement the effectiveness of sea moss. Some of the typical additional ingredients you’ll find are:


A root vegetable known to promote circulation, improve skin quality, provide antioxidants, and have anti-inflammatory effects.


A brown seaweed that contains high levels of iodine, bladderwrack also contains fiber, vitamin B12, and iron.

Black pepper

An extract used to increase the bioavailability of sea moss and other ingredients in a supplement.

Are sea moss supplements a good choice for you?

Sea moss supplements are a good choice for people who want to consume a product that may deliver a large number of vitamins and nutrients and could potentially help with various health issues.

You can choose from different delivery methods, including raw sea moss. Typically, supplements are available in capsules, gummies, powders, and gels. You can safely take up to 4g of sea moss per day, but you need a much smaller dose (about 2tbsp) to reap the health benefits. Follow dosing instructions on the product you purchase.

It’s also important to remember that taking a sea moss supplement is not a replacement for a healthy diet. Even though it does include so many vitamins and nutrients your body needs, you should take it in tandem with a balanced diet.

Who should avoid them

Because sea moss contains high levels of iodine, it can help with thyroid health, but it can also lead to thyroid issues. For example, one clinical study showed that taking sea moss supplements could worsen the impacts of Grave’s disease. People with hypothyroidism or hyperthyroidism should consult a doctor before starting a sea moss supplement.

Consuming too much iodine is also dangerous for anyone, regardless of health status. Doing so can cause your thyroid to enlarge, which can develop into a goiter. It’s important to follow the package instructions with your sea moss supplement and not overdo it.

Sea moss is also known to have mild anticoagulant properties. If you take blood thinners, have high blood pressure, or live with a bleeding disorder, it’s also best to avoid this supplement.

Are sea moss supplements safe?

In general, sea moss supplements are safe to take for most people in moderation. The downside of taking sea moss is that scientific research on its benefits to humans is lacking, and the algae contain some components that could pose a danger.

Sea moss is high in iodine. Those with thyroid issues should consult a doctor before taking a sea moss supplement. Since too much iodine can cause health problems in otherwise healthy people, taking only one serving of sea moss daily is essential.

Sea moss (and seaweed in general) absorbs heavy metals from its environment. Consuming toxic levels of heavy metals can cause serious health complications. Most sea moss doesn't absorb enough to be considered toxic, but this is another good reason to take the supplement in moderation.

Because sea moss is a product of its environment, it’s challenging to know just how much of each nutrient and vitamin you may get from each batch. Some locations or harvests of sea moss may be more potent than others.

Consult a doctor before beginning any new supplement. You should especially consult a doctor before starting sea moss supplements if you take blood thinners or live with:

  • Hyperthyroidism
  • Hypothyroidism
  • High blood pressure
  • A bleeding disorder

If you have any adverse effects from taking a sea moss supplement, discontinue use.

Infinite Age Sea Moss Advanced

Best for most people


  • Contains sea moss, burdock root, and bladderwrack
  • Manufactured in a cGMP-certified facility
  • Company offers capsules and gel
  • Subscribe and save options
  • 90-day money-back guarantee


  • Only subscription option is monthly
  • Free shipping only eligible in the U.S.

We consider Infinite Age Sea Moss Advanced best for most people because of the supplement’s list of ingredients and the company’s commitment to supplement safety and generous money-back guarantee. Sea Moss Advanced capsules contain sea moss, bladderwrack, and burdock root — a combination of ingredients that promote overall well-being in addition to:

  • Full-body detoxification
  • Increased energy levels
  • Mood elevation
  • Boosted immune function
  • Improved thyroid and digestive health
  • Better hair, skin, and nails

In addition to these benefits, the supplement is vegan and does not contain gluten or gelatin. It is manufactured in a cGMP facility, which shows Infinite Age’s commitment to product safety and quality.

Infinite Age also sells a sea moss gel that can be used in smoothies, drinks, and other foods or as a topical ointment.


When you purchase Sea Moss Advanced, you can take advantage of a 90-day money-back guarantee. Infinite Age will refund the full amount of your purchase if you’re not satisfied for any reason. The company also offers quick three-day shipping and tracking of all shipments. Shipping is free when you order three or more bottles of product.

You can make a one-time purchase or opt for a monthly subscription, which offers deeper discounts. Here is the price breakdown:

Oweli Organic Sea Moss

Best for gut health


  • Organic supplement without additives or GMOs
  • Uses a combo of sea moss, burdock, and bladderwrack
  • Manufactured in a cGMP-registered facility
  • 100-day money-back guarantee
  • Free shipping on orders over $75


  • Packaged in a facility that handles non-vegan ingredients
  • No subscribe and save options

With its combination of sea moss, burdock root, and bladderwrack, Oweli Organic Sea Moss offers a variety of holistic health benefits, including promoting digestive health by nourishing the growth of good bacteria in the gut. The formulation is organic and leaves out additives, GMOs, pesticides, heavy metals, or other ingredients that could adversely affect gut health. Other health benefits include:

  • Promoting thyroid health
  • Balancing blood sugar
  • Assisting with weight control
  • Supporting cardiovascular function
  • Providing healthier skin
  • Boosting immunity

All of the ingredients of Oweli Organic Sea Moss capsules are tested before formulation to ensure purity and potency. The supplement is manufactured in a cGMP-compliant facility registered with the FDA.

Take two capsules with 8oz of water and a meal every day. Each bottle contains 30 servings, a one-month supply.


Oweli offers a 100-day “bottom of the bottle” money-back guarantee. This means you can return the product for any reason within 100 days of purchase, even if it’s empty, for full refund. The company provides free shipping on orders over $75. While there are no subscribe and save options, there are discounts for bulk purchases. View the price breakdown below:

VivaNutra Regeneration Sea Moss Supplement

Highest potency


  • A potent formulation with high levels of sea moss and other ingredients
  • Free of soy, gluten, and GMOs
  • Vegan-friendly
  • Contains 102 vitamins and minerals
  • Supplements are third-party tested
  • 90-day money-back guarantee


  • Higher dose of sea moss could impact iodine levels
  • Free shipping only on orders over $75

VivaNutra Regeneration Sea Moss Supplement is our highest potency pick because it provides you with a staggering 776mg of sea moss per serving, in addition to 660mg of bladderwrack and 50mg of burdock root. This is the highest combination dose of ingredients out of any of the supplements included in this guide. This formulation offers the following holistic health benefits:

  • Regulate thyroid function
  • Boost energy level
  • Improve mental health
  • Enhance bone strength
  • Nourish skin
  • Boost immunity
  • Improve respiratory health
  • Balance fluid levels
  • Aid metabolism and digestion

In addition to a potent formula, VivaNutra does not include fillers, soy, gluten, or GMOs in the formulation, and it works well for vegans and people on alkaline or keto diets. Because of its high potency, it includes 102 minerals and vitamins, including:

  • Zinc
  • Calcium
  • Iron
  • Sodium
  • Iodine
  • Chloride
  • Potassium
  • Sulfur
  • Vitamin A
  • Vitamin B
  • Vitamin C
  • Thiamin
  • Niacin
  • Vitamin B6
  • Vitamin E
  • Vitamin K
  • Folate
  • Choline
  • Omega-3 fatty acids
  • Dietary fibers
  • Protein

The supplement is manufactured in a cGMP-certified facility, and all products are third-party tested for safety and efficacy. VivaNutra also partners with Vitamin Angels, a non-profit organization that donates vitamins to people at risk of malnutrition. For each bottle sold, they donate a year’s worth of vitamins to a person in need.


VivaNutra offers a 90-day money-back guarantee on up to three bottles of product. This applies only to U.S. orders. The company ships domestically and internationally and provides a tracking number once your order ships.

You can choose a one-time purchase or opt for the company’s subscribe and thrive program, which auto-delivers products every 30, 60, 90, or 120 days for a 15% discount. All orders over $75 ship for free. Here is the price breakdown:

NutriVein Premium Sea Moss

Best budget pick


  • A 60-day supply for only $19.99
  • Subscribe and save 10%
  • 30-day money-back guarantee
  • Free shipping on all orders
  • Easy-to-swallow capsules
  • Vegan-friendly


  • Uses a proprietary blend — you won’t know how much sea moss you get per serving
  • No bulk savings with subscription

We concluded that NutriVein Premium Sea Moss is your best budget pick because you can purchase a 60-day supply for only $19.99. The company also offers deep discounts if you subscribe, bringing your total to only $17.99 per 120-count bottle. They also provide a 30-day money-back guarantee and free shipping on all orders regardless of price. This combination of benefits makes NutriVein the most cost-effective option of the products in this guide.

In addition to being budget-friendly, Premium Sea Moss includes a wide array of vitamins, minerals, and nutrients because of the potent formula, which contains sea moss, burdock root, and bladderwrack. The supplement comes in easy-to-swallow capsules that help to:

  • Boost immunity and metabolism
  • Enhance digestion
  • Improve thyroid function
  • Unclog airways

Premium Sea Moss is manufactured in a cGMP-registered facility and is third-party tested to ensure safety and purity. The supplement does not contain binders, allergens, lactose, preservatives, or artificial ingredients. Take two capsules every day for best results.


A one-time purchase of one bottle (120-count) is $19.99. If you choose to subscribe, you’ll save 10% for $17.99 per bottle. You can choose auto-delivery every 1-4 months. Standard shipping is free on all orders, but you can opt for expedited shipping for an additional fee. NutriVein ships worldwide and offers a 30-day money-back guarantee.

Maju Wild Sea Moss Capsules

Quickest results


  • Includes black pepper extract for higher bioavailability
  • Gluten-free and vegan-friendly
  • Includes over 90 vitamins and minerals
  • 60-day money-back guarantee
  • Free shipping on orders over $75


  • Low dose of sea moss per serving (300mg)

Maju Wild Sea Moss Capsules include an ingredient that helps your body quickly absorb the ingredients — black pepper extract. This extract is frequently used in supplements because it increases the bioavailability of ingredients and has its own health benefits, like providing antioxidants and inhibiting free radicals. The supplements also include sea moss, burdock root, and bladderwrack for a total of over 90 vitamins and minerals.

These capsules are gluten-free and vegan-friendly and can help:

  • Boost immunity
  • Provide joint support
  • Enhance skin health
  • Aid digestion


Qualify for free, two-day shipping by spending over $75 and take advantage of Maju’s 60-day money-back guarantee.

You can choose a one-time purchase or subscribe and save 20%. One 60-count bottle costs $22.99 for a one-time purchase or $18.39 for a subscription order. You can opt to have your product delivered every 30 or 60 days.

Double Wood Irish Moss Extract

Purest formula


  • Formulation only includes sea moss
  • 1,200mg of sea moss per serving
  • Manufactured in cGMP-certified facility
  • Vegan-friendly
  • Does not contain soy, gluten, or GMOs
  • 30-day money-back guarantee


  • Company suggests a high dose — consult your doctor

Double Wood Irish Moss Extract provides a total of 1,200mg of sea moss in every serving and does not include any other ingredients. If you are interested in only consuming sea moss (with trace amounts of cellulose in the capsule), this is the best option. While some of the other ingredients in sea moss supplements provide health benefits, with Double Wood, you know that you’re only ingesting pure sea moss and benefiting from its many healthy qualities.

Double Wood also takes safety and purity seriously. They offer a certificate of analysis for each supplement they produce and provide access to third-party test results. Their products are manufactured in a cGMP-certified facility.

This supplement:

  • Includes vitamins A, E, F, and K
  • Enhances respiratory health
  • Includes calcium, iodine, and potassium
  • Does not contain soy, gluten, or GMOs
  • Is vegan-friendly

Take two to four capsules each day with food. Double Wood advises that some people can take up to six capsules daily, but we recommend speaking with a physician before taking such a high dose.


Double Wood provides a 30-day money-back guarantee, and they ship internationally (excluding Mexico).

You can make a one-time purchase of one bottle for $19.95 or a double-pack for $34.95. If you choose to subscribe, you save 15% for a single-bottle price of $16.96. You can opt for auto-delivery every 30, 60, or 90 days.

Additional sea moss supplements

In addition to our top six picks, there are many other high-quality sea moss supplements on the market. Below, you’ll find a few notable ones. Read the description to determine if these supplements fit your health needs.

  • Simple Life Nutrition Irish Sea Moss: A detoxifying organic capsule for immune support, joint health, and improved skin
  • Oculus Organics Sea Moss Complex: An energy-boosting supplement that supports improved skin, immunity, thyroid function, and respiration
  • Nurture Nutri Organics Sea Moss Complex: An anti-aging sea moss capsule that improves skin health, energy level, and thyroid function

Sea moss supplement FAQ

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