As a marine biologist and co-founder of Cold Current Kelp, I’ve spent years studying and farming kelp in the cold waters of the Gulf of Maine. One of the questions I hear most often is simple: is kelp actually good for your skin?
The short answer is yes—but only if it’s grown and processed and incorporated into products in a way that preserves what makes it effective.
Kelp is a large brown seaweed (among thousands of species of seaweeds that are found all over the world). It not only survives but thrives(!) in an extremely harsh and unforgiving environment. Fluctuating and often very cold temperatures, constant motion, and intense exposure to sunlight create stress conditions that force kelp to produce secondary protective compounds that protect and support it as it grows. These same compounds do the same thing for your skin.
Kelp naturally contains:
- Antioxidants - defend against environmental stress and free radicals.
- Polysaccharides (complex sugars) - support hydration and strengthen skin barrier.
- Chlorophyll - soothes and protects skin from environmental stress.
- Carotenoids - defend against oxidative damage and promote skin resilience.
- Minerals and trace elements -help boost overall skin health.
Together, these compounds support skin in a way that goes beyond surface-level hydration.
One of the most important benefits of kelp is its ability to help reinforce the skin barrier. When your skin barrier is functioning well, your skin retains moisture more effectively, fine lines and wrinkles are minimized, and it becomes more resilient to irritation and environmental stress.
But here’s what else matters -
Not all kelp-based skincare products deliver these benefits equally. The effectiveness depends heavily on:
- Where the kelp is grown
- How it’s processed after harvest
- How its incorporated into the product
Kelp that grows in the cold waters of the Gulf of Maine tends to be more nutrient-dense due to the high upwelling and nutrient concentration of the region. Because we plant it rather than wild-harvest our kelp, it additionally benefits the environment by absorbing carbon dioxide and excess nutrients from our oceans.
Just as important is how the kelp is handled and processed post-harvest.
If kelp is exposed to excessive heat or harsh processing, many of its beneficial compounds can be degraded or lost entirely.
At Cold Current Kelp, we preserve many of kelp's bioactives through careful harvesting, gentle sun drying, and a toxin-free, scientifically supported extraction process.
In practical terms, what does this mean for your skin?
Using kelp-based skincare can help:
- Improve hydration in a more lasting way
- Support repair of the skin barrier
- Increase skin's resilience against environmental stressors
It’s not a quick-fix ingredient—but it’s a foundational one.
If you’re looking for skincare that works with your skin’s natural functions rather than overriding them, kelp is a powerful place to start.