Sea Veggies Are Good For Your Gut — But What About The Skin?

It's not always the case that what's good for the gut is equally beneficial for the skin, but in the case of sea vegetables, there's quite a bit of overlap. Sea veggies—like kelp, algae, chlorella, and spirulina, for example—are hailed as superfoods in nutrition, as they are loaded with antioxidants, minerals, proteins, and fatty acids.

Many of these botanicals are beloved in skin care formulations, too, with a variety of benefits, including improved barrier function, smoother texture, the eased appearance of fine lines, and brighter tone. 

A caveat: Superfood isn't a specific class of foods, with defined parameters. It's very similar to how "clean," "hypoallergenic," or even "dermatologist-tested" aren't regulated words in the beauty space.

The first thing to understand about algae is they are not a monolith—experts believe there are more than 800,000 species of algae1, and not all species carry the same benefits. In addition, how they're formulated within a product will influence how they influence the skin. 

In fact, some types of algae—most notably brown seaweed—were found to be able to attract and hold more water than hyaluronic acid, which is arguably skin care's most famous humectant. Humectants can improve the appearance of fine lines and wrinkles by plumping the skin with moisture. 

They're also excellent at restoring the barrier and skin microbiome. Most sea veggies are thought to be what's known as prebiotics. Prebiotics feed the ecosystems on the skin, helping promote a healthy, balanced environment—and in doing so, reducing inflammation, improving complexion, and helping deal with signs of premature aging. For example, chlorella (a specific type of micro green algae, found in mindbodygreen's postbiotic hand cream and body lotion) has been shown to reduce transepidermal water loss, ease visible signs of stress, smooth the appearance of fine lines, and improve overall complexion (i.e., reduce dark spots).