Luseta Biotin And Collagen Strengthening Oil Serum: Luseta biotin and collagen strengthening oil is packed with nutrients that the hair soaks up to restore its luster and beauty. Each strand of hair will be stronger and more moisturized, and the biotin and collagen serum creates a protective barrier that stops pollutants and UV rays from harming the strands. There is less frizz, and the hair is more manageable.