WASHINGTON — The Food and Drug Administration has extended the comment period by 60 days to Aug. 1 for two proposed rules that would change the Nutrition Facts Panel on products.

Both proposed rules appeared in the Federal Register on March 3. One deals with revising nutrition and supplement facts labels. The other involves such issues as dual-column labeling and updating, modifying and establishing certain reference amounts customarily consumed.

“FDA is proposing to update the Nutrition Facts label for packaged foods to reflect the most recent public health and scientific information, including information about the link between diet and chronic diseases, such as obesity and heart disease,” the FDA said. “The proposed label would also update out-of-date serving size requirements to better align with how much people really eat, and it features a fresh design to highlight key parts of the label, such as calories and serving sizes.”