iS CLINICAL’s Poly-Vitamin Serum is an intensive, reparative formula that hydrates, regenerates, and repairs the skin while providing essential vitamins and bio-nutrients to the cells. Patients who have suffered radiation and chemotherapy have shown significant improvements in skin quality after using this amazing serum. CLINICAL Poly-Vitamin Serum protects against free radical damage caused by aging and disease. One of its primary functions is to provide Vitamin B5. As a result of vitamin B5’s role in boosting enzyme production, the body’s cellular metabolism increases, leading to optimum health.