Professional Serum 5ml Volume: 1 x 5ml Contains the highest concentration of PTT-6 Keeps skin supple and healthy while targeting fine lines, wrinkles, and hyperpigmentation Can be used with other skincare daily to optimize results Recommended for clinical or at-home skin treatments to boost skin repair and renewal Skin repairing Helps calm inflammation I'm pretty sure the expiration says 24MAY28 on container inside bag.