From the brand: “Powered by ProCelinyl™, a groundbreaking discovery using Revela's Al engine to directly target dormant follicles, The Hair Revival Serum revitalizes areas experiencing hair loss for thicker, fuller hair in as little as 6 weeks. This ultra-lightweight formula is suitable for all hair & scalp types. - Easy, lightweight application suitable for both day and night use - Suitable for all hair types, regardless of gender, age, and ethnicity - Clinically tested, dermatologist recommended 40mL | 1.4 fl. oz.” Please be aware the exp date printed on the box is Jan 2024, which is the reason for the major markdown. I’m covering the shipping, too, so why not give it a try!