Are follow-up formulas any different from normal formulas?

I've been getting a lot of information about follow-up formulas. Are they different from normal formulas, and are they really better for a baby over 4 months?

The main difference is that the follow-up formulas have fewer calories per ounce than normal formulas. Some have added calcium or other vitamins. The reason for reducing the calories in the follow-up formula is that as the infant starts eating solid foods at around 6 months, he'll be getting some calories from foods and won't need as many from formula. Information available to date does not show that follow-up formulas are better than normal formulas, though they are generally less expensive. However, as the baby starts to increase the quantity of solid foods he eats, you should decrease the intake of formula. An average intake at 6 months of age is about 32 ounces a day, and by 12 months should be just 16 ounces a day, so you'll save some money over time. Babies will be getting vitamins from foods as they take less formula, and most do perfectly well on normal formula.