Cosmedix Serum 24 $110.00 Default Title Out of stock Please fill in the form below if you'd like to be notified when it becomes available. Your Email Send This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply. Stimulate & Renew A unique blend of LG-Retinex, microencapsulated Retinol and Retinaldehyde makes Serum 24 youth in a bottle – an age-defying serum.