The Food and Drug Administration has released new rules to ensure infant formula is safe and nutritious.
Most manufacturers already practice these rules, but the FDA is putting them in writing.
Manufacturers are required to prove their formulas include the proper amount of protein, carbohydrates, fats, vitamins and minerals.
They will also have to test samples for contaminates like salmonella before they are distributed.
These new requirements are mostly directed at new formula products.
The FDA says breastfeeding is still strongly recommended.