C-Phycocyanin from Spirulina is widely used as a natural blue food coloring agent in the food and beverage industry. It is particularly valued in products like candies, ice creams, and drinks where a vibrant, natural blue hue is desired. Beyond its coloring properties, it is also incorporated into health supplements due to its antioxidant and anti-inflammatory benefits, which may support immune function and reduce oxidative stress. In the cosmetic industry, it is utilized in skincare products for its potential to protect the skin from environmental damage and promote a healthy complexion. Additionally, C-Phycocyanin is employed in biomedical research as a fluorescent marker in various diagnostic and experimental applications.