Allschoolabs Nutrition Center ? Windmill Daily Vitamin Maximum Formula Compare to One-A-Day Maximumamp;reg; and Save100 Tablets Windmill Daily Vitamin Maximum Formula provides you with a nice assortment of vitamins and minerals per tablet. If you compare the Windmill Daily Vitamin Maximum Formula to the One-A-Day Maximumamp;reg; formula, you will find out that the two formulas are almost identical; however, Windmill does not use artificial colors, flavors, or preservatives.