Other than that, there is also a manufacturer claim saying that Macrocystis Pyrifera "increases the vitality of epidermal growth, improves collagen synthesis, and maintains skin elasticity".
We wrote some more about algae extract in general here.
Show me some proof
- International Journal of Biological Macromolecules, May 1, 2009, Influence of the extraction–purification conditions on final properties of alginates obtained from brown algae ( Macrocystis pyrifera )
- Bioresource Technology, May 1, 2015, Exploring the potential of using algae in cosmetics