In what order must ingredients be listed on a product's label?

The ingredients on a product's label must be listed in descending order by quantity. This means that the ingredient present in the highest concentration appears first, followed by those in lesser amounts. This requirement is crucial for consumers who need to know which ingredients are most predominant in a product, especially for those who may have allergies or sensitivities to specific substances. By listing ingredients in this manner, it allows for greater transparency and helps consumers make informed choices regarding the products they use on their skin or hair. Additionally, regulatory agencies enforce this labeling standard to ensure consistency and clarity across cosmetic products.