Seaweed is not just healthy to eat, it is also a powerhouse ingredient in skincare. A wide variety of algae species exist around the world, which not only enriches marine life but also enriches our life, especially in terms of skincare.

These marine plants have a much bigger positive impact on our skin than most think.
Seaweed is anti-inflammatory and contains minerals such as zinc and magnesium, as well as Vitamins B3 and C, that brighten the skin, reduce the appearance of dark spots and even out skin tone.
Many marine algae have high levels of antioxidants and essential minerals as they have to survive in severe ocean environments and protect themselves against UV radiation and pollution. 
The richness in polysaccharides help to lock moisture into our skin. The polysaccharides in seaweeds will vary from species to species and location of growth. Many of these polysaccharide structures are complex, branched molecules with sulfates, proteins, and/or various sugars attached. Interestingly, some of these polysaccharides look like β-(1-3) and β-(1-6) glucans similar to what is one active component of several medicinal mushrooms. β-glucans are immunomodulatory and could be beneficial for our human health.

One thing is safe to say; seaweed is 100% natural and amazing! Due to it's variety of benefits, seaweed-containing skincare is for everybody. No matter if you got dry-, acne-prone-, sensitive-, oily-, rosacea-, or maturing skin, seaweed will cover your skin's needs.
To sum it up, seaweed is a beautifully nutrient-rich and multifunctional ingredient!

Sources:
https://www.byrdie.com/seaweed-for-skin-4782388#toc-benefits-of-seaweed
https://www.nakinskincare.com/blogs/news/10-benefits-of-seaweed-for-skin
https://www.humnutrition.com/blog/benefits-of-seaweed-for-skin/