OPTIMUM STRESS B COMPLEX 120s  Complex plus Vitamin C by Optimum Nutrition is made with the finest raw materials. Two capsules provide all of the B-Complex Vitamins, Vitamin C, Choline, Inositol, and PABA in appreciable amounts. High Potency Stress B Complex plus Vitamin C is free of fillers, preservatives and many common allergens such as corn, wheat, yeast and dairy.