Nestle Nan PRO 4 is a spray dried follow-up formula with DHA, ARA, Vitamins A, C, D, Calcium, Zinc, and Iron for infants after 18 months and up to 24 months when they are not breastfed. Nestle NAN PRO 4 contains DHA. DHA helps support normal brain development. Also contains Iron. Iron helps support normal cognitive development. Contains Vitamins A, C and Zinc. Vitamins A, C and Zinc contribute to normal immune system function. Contains Calcium and Vitamin D. Calcium and Vitamin D help support normal growth and development of bones. 155 years of expertise in Infant Nutrition Nestle develops infant nutrition products backed by evolving science and research. Innovation has been at the heart of Nestle since its beginning. Nestle agrees with the World Health Organization and other medical and health associations that breast milk is the best and the most natural food for babies.