Cetaphil Healthy Radiance Brightening-C Serum is a potent gel-based formula crafted for sensitive skin. Specially developed for the face and neck, it enhances all skin toneCetaphil Healthy Radiance Brightening-C Serum is a potent gel-based formula crafted for sensitive skin. Specially developed for the face and neck, it enhances all skin tones with a radiant glow and immediate brightness.s with a radiant glow and immediate brightness.