A U.N. panel on standards for food safety and labeling plans to ask makers to print data on the percentages by weight of certain ingredients in prepackaged foods on labels attached to the products, nongovernment organization sources said.

The Codex Alimentarius Commission — a panel of experts formed by both the World Health Organization and the Food and Agriculture Organization — will formalize a decision to devise data standards at a meeting in late June in Geneva.

Following this decision, a task force on labeling guidelines — the Committee on Food Labeling — will discuss the propriety of obliging makers to attach labels displaying weight-based percentages of ingredients in packaged foods, the sources said.