U Poudre à lever is a chemical leavening agent (baking powder) specifically formulated for home baking, such as making cakes, pastries, and doughs. It is a private-label product developed by Coopérative U, one of France's largest retail cooperatives. The product is manufactured in France, adhering to the quality standards of the 'U' brand which serves Super U, Hyper U, and Utile stores.

The brand is owned by Coopérative U (formerly Système U), a group of independent retailers headquartered in Rungis, France. This cooperative model means the brand is not owned by a single person but by its member-owners. It represents a significant part of the French domestic food market, focusing on distributing products under their own private label to provide value and quality consistency to French consumers.