The Seaslow cosmetic case study explores the use of algal biomass from IMTA systems and natural environments for cosmeceutical applications. It begins with an introduction to the benefits of algal biomass, focusing on knowledge transfer, extraction, and concentration techniques. The study highlights the development of UV photoprotectors from algae, detailing the strategy for optimizing these compounds. It also addresses biomass availability and the role of IMTA in ensuring a sustainable production process, culminating in the creation of Seaslow cosmetic products designed for natural skincare solutions.