Porphyridium Polysaccharide

Porphyridium polysaccharide is an extracellular polysaccharide derived from Porphyridium, a single-celled red microalga. The microalga naturally produces this sulphated polysaccharide as a survival mechanism in harsh coastal environments, which has led researchers to investigate its potential benefits in skincare formulations.In topical products, this ingredient functions as a skin conditioning agent and antioxidant. The polysaccharide is structurally similar to hyaluronic acid, which naturally occurs in skin and plays a role in moisture retention and elasticity.

Porphyridium polysaccharide appears to work through several mechanisms. Its molecular structure allows it to hold water within the skin, enhancing hydration. Additionally, research indicates it may activate certain cellular pathways that support the skin's barrier function and reduce inflammatory signalling.In laboratory studies, the polysaccharide has been shown to suppress inflammatory markers and support natural skin barrier proteins. However, most of this research has been conducted in cell cultures, so the degree to which these effects translate in real-world skincare use remains to be…

Porphyridium polysaccharide is typically found in moisturisers, serums, and barrier repair products. It can be used daily as part of your skincare routine. Apply to clean skin, either alone or layered with other products. There is no standard dosing requirement for topical use; follow the specific product instructions.

Porphyridium polysaccharide is generally well-tolerated with a favourable safety profile. It is suitable for sensitive skin types, though as with any ingredient, a patch test is prudent if you have known sensitivities.