Formula, or infant formula, is a type of artificial breast milk that is used to feed infants who are unable to breastfeed or who are not receiving enough breast milk. While formula is generally considered safe and nutritious for infants, one common complaint about it is that it has a bad smell.

There are a few possible reasons why formula may have a bad smell. One reason is the type of proteins used in the formula. Formula is made from a variety of proteins, including milk proteins, soy proteins, and hydrolyzed proteins. Some types of proteins, such as soy proteins, can have a stronger or more unpleasant smell than others.

Another reason for the bad smell of formula may be the presence of additives or preservatives. Formula can contain a variety of additives and preservatives to improve its taste, texture, and shelf life. Some of these additives, such as DHA and ARA, are added to mimic the nutrients found in breast milk and are considered safe for infants. However, they can also contribute to the smell of the formula.

It is also possible that the bad smell of formula is due to the manufacturing process. Formula is made through a complex process that involves mixing and heating various ingredients, and this process can sometimes produce an unpleasant smell.

Finally, the bad smell of formula may be due to the way it is stored. If the formula is not stored properly or if it is past its expiration date, it may develop an unpleasant smell.

Overall, the bad smell of formula can be attributed to a variety of factors, including the type of proteins used, the presence of additives and preservatives, the manufacturing process, and the way it is stored. While the smell of formula may be unpleasant to some, it is generally considered safe for infants to consume. If you are concerned about the smell of your baby’s formula, you should speak with a healthcare professional for guidance.