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Sea Moss Can Benefit Any Skin Type: Here's How To Use It In Your Routine

Last updated on August 31, 2022
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Not many skin care ingredients can help clear clogged pores, smooth fine lines, hydrate, and fade dark spots.

Then again, not many skin care ingredients can thrive in the salty depths of the ocean.

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Of course, we're talking about algae: The Swiss Army knife of skin care can benefit your complexion in a dazzling number of ways. (Read all about 'em here!)

But experts believe there are nearly 73,000 species of algae, and we've only begun to scratch the surface in terms of their unique assets.

Although, one popular type of seaweed is highly sought after in the beauty space: Check your labels for sea moss—it has some pretty swoon-worthy benefits for the skin. 

What is sea moss? 

Sea moss (also known as Irish moss or by its scientific term, Chondrus crispus) is a type of red algae that grows on rocks in deep ocean water.

"Like other forms of seaweed, it is rich in bioactive antioxidants, antimicrobial, and anti-inflammatory compounds that have potential benefits for skin care," notes board-certified dermatologist Cynthia Bailey, M.D., founder of Dr. Bailey Skin Care.

Specifically, sea moss is rich in vitamins and minerals, including zinc, potassium, magnesium, sulfur, and phosphorus.

"As someone from the Caribbean, I'm all too familiar with its use in drinks and smoothies (it's very popular there), but it can also have benefits when applied to the skin," board-certified dermatologist Ife J. Rodney, M.D., FAAD, founding director of Eternal Dermatology + Aesthetics, tells mbg. 

Meet the experts
  • Cynthia Bailey, MD, is a board-certified dermatologist
  • Ife J. Rodney, MD, FAAD, is a board-certified dermatologist and founding director of Eternal Dermatology + Aesthetics
  • Krupa Koestline is a clean cosmetic chemist and founder of KKT Consultants
  • Mascha Davis, MPH, RDN is a registered dietitian
  • Joshua Zeichner, MD, is a board-certified dermatologist, the director of cosmetic and clinical research at Zeichner Dermatology, and an associate professor of dermatology at the Mount Sinai Hospital in New York City
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Benefits of sea moss

Let's discuss why you might want to incorporate the nutrient-rich seaweed into your beauty routine: 


It's moisturizing

When used topically, algae has been found to be a better humectant1 than even hyaluronic acid, one of the buzziest hydrators of all.

And sea moss, in particular, has special moisturizing properties: It contains high amounts of polysaccharides (called carrageenans), which act as a thickening agent that forms a protective yet non-occlusive film over the skin.

"Most benefits of sea moss are attributed to its film-forming properties, making it ideal for moisturizers or serums," says clean cosmetic chemist Krupa Koestline, founder of KKT Consultants. "Carrageenan is used to give products a thick and rich feel," Bailey adds. "It binds water and can help hold water to the skin."

Side note: Some hair care products (namely gels) incorporate sea moss as well, as it thickens formulas and coats strands in moisture—like this Styling Custard from Pattern.

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It has anti-inflammatory properties

"It has anti-inflammatory properties thanks to the high concentration of zinc and sulfur," says Rodney.

This makes it helpful for managing dry skin and other skin concerns.

Sea moss extract may even enhance skin photoprotection from UVB exposure, notes Bailey, as it helps combat free radicals on skin cells2.

Plus, those carrageenans we mentioned? Studies show they even have antibacterial benefits3


Helps protect the skin barrier

As mentioned, sea moss leaves a film over the skin—and according to Koestline, this film is structurally similar to the skin's own proteins.

"Because of this characteristic, the seaweed extract forms a protective seal over the epidermis," she says.

Sounds very scientific, but keratin makes up the majority of the epidermis (aka, the top layer of your skin), which is in charge of filtering out aggressors. 

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Helps balance oil production

As mentioned, sea moss contains sulfur, which "also helps with oily skin as it can help with the overproduction of sebum," says Rodney. "Products with sea moss can bring a much-needed balance while moisturizing and protecting your skin." 


Helps maintain a healthy complexion

"Sea moss is noncomedogenic," Rodney adds, and it contains minerals that can help maintain a healthy complexion.

As we mentioned up top, it also has antibacterial properties that can help guard skin health.

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How to use sea moss in your routine

Due to its ability to leave a protective film over the skin, you might want to look for sea moss in leave-on treatments, like serums, moisturizers, and masks.

"However, it can be used in a cleanser for a lightweight, moisturizing cleanse," notes Koestline.

Look for sea moss, Irish moss, or Chondrus crispus extract on your skin care labels.

Rodney also recommends snagging a jar of straight-up sea moss gel as a DIY mask—like this wildcrafted option from Herbal Vineyards.

"You can use the gel as a mask one to two times a week, increasing the frequency as needed," she says.

Or if you'd like to stick to market formulas infused with sea moss extract, browse our picks below. 

It's important to only use sea-moss-containing products from companies that you trust source ingredients carefully.

Side effects

Like any naturally derived ingredient, sourcing matters.

"There are several options on the market that are man-made, lack the potency of natural moss, or contain heavy metals," says Rodney. "Read the ingredients carefully and do some background research before choosing the right product."

Make sure the brand always sources wild, organic sea moss (rather than farmed or pool-grown) and tests it for heavy metals.

"It's important to only use sea-moss-containing products from companies that you trust source ingredients carefully," adds Bailey. 

According to an FDA paper on the safety of sea moss, there was no reported evidence that sea moss affects the skin negatively.

"At the time of the review, over 94 products were found to contain sea moss, typically at a maximum concentration of 2% or less," Bailey says.

Of course, you should still always patch test before slathering on a new ingredient or product, but topical sea moss seems quite gentle, even for sensitive skin. 

Can you consume it?

In short: Yes! Eating sea vegetables—like sea moss—helps your body absorb essential micronutrients that support your overall health and well-being4.

"Similar to many different sea veggies, like nori, kelp, and spirulina, sea moss is deemed as a superfood of the sea for its high nutrient content," registered dietitian Mascha Davis, MPH, RDN, says. (Like iron, folate, magnesium, phosphorus, and zinc, to name a select few.)

Of course, sourcing still matters, but you can find the red algae in a variety of cuisines and supplements.

mbg tip

For more information about consuming sea moss, read our full guide here.

The takeaway

Sea moss contains impressive moisturizing, oil-balancing, and anti-inflammatory properties that make it fit for all skin types.

Just be mindful of sourcing, and always do your brand research, but when it comes to skin benefits, Bailey considers sea moss one "sweetheart ingredient."