Puritans Pride is proud to introduce to you our Letter Vitamin Kit. Contains the following items: Item # 15605 - Vitamin D3 1,000 IU Vitamin D3 is a more potent and bioavailable form compared to D2. Helps maintain healthy bones in adults. Assists in maintaining a healthy immune system. Supports neuromuscular function. Item # 194 - Vitamin B-Complex and Vitamin B-12 For that Feeling of Well Being! The B-Vitamin Complex is made up of several B vitamins that work well together to support nervous system health. This product combines Vitamins B-1 (Thiamin), B-2 (Riboflavin), B-3 (Niacin), and B-12, from natural sources. B-Complex vitamins are involved in energy metabolism and help maintain the health of nerves and heart health. Item # 1410 - Vitamin C-1000 mg with Bioflavonoids Vitamin C is one of the best antioxidants for fighting free radicals. It also plays an important role in supporting immune function.