The law of diminishing marginal utility suggests that the total utility that a consumer derives from a product will increase slower and slower as more of the product is consumed.

Law of Diminishing Marginal Utility

The economic principle that states as a person increases consumption of a product, there is a decline in the marginal utility that person derives from consuming each additional unit of that product.

Total Utility

The total satisfaction or benefit derived from consuming a particular quantity of goods or services.