Windmill Daily Vitamin with Iron and Beta-Carotene formula provides you with a nice assortment of vitamins and 18 mg of iron per tablet. If you compare the Windmill Daily Vitamin with Iron and Beta-Carotene formula to the One-A-Day Essential® formula, you will find out that the two formulas are almost identical; however, Windmill does not use artificial colors, flavors, or preservatives. Take 1 Tablet Daily as a Dietary Supplement or as directed by a healthcare professional T All Windmill supplements are manufactured in the United States in an FDA-inspected facility whose GMPs (Good Manufacturing Processes) are independently verified by qualified certification organizations. Free of artificial colors, flavors and preservatives, Windmill is a trusted name that has been providing America with quality supplements for over 35 years. One-A-Day Essential® is a registered trademark of Bayer Health Care LLC, Consumer Care Division, Morristown, NJ Compares to One A Day Essential