The Food and Drug Administration is set to announce the largest nutrition label alteration in nearly 20 years with First Lady Michelle Obama ready to do the honors.

According to BBC News, Obama will reveal changes such as more realistic serving sizes and emboldened calorie counts Thursday at a White House event. The FDA is reportedly set to adopt the changes.

"You as a parent and a consumer should be able to walk into your local grocery store, pick up an item off the shelf and be able to tell whether it's good for your family," said Obama Thursday morning. "So this is a big deal, and it's going to make a big difference for families all across this country."

According to the New York Times, the major nutrition label changes in the 1990s were made from eating habits and portion sizes based on data from the 1970s and 1980s. As it was in the 90s, the FDA is once again trying to reflect normal portion sizes that accurately represent an average American's diet.

"It's an amazing transformation," FDA commissioner Dr. Margaret A. Hamburg, told the NYT. "Things like the size of a muffin have changed so dramatically. It is important that the information on the nutrition fact labels reflect the realities in the world today."

More nutrition label changes include a separate line for manufactured sugars added to food, a substance that many experts say is a leading cause of obesity. Dr. David A. Kessler, the FDA commissioner who pushed for change in 1990s, said sugars are being targeted this time around to make labels easier to understand for the person who stops to read them.

"The changes put added sugars clearly in the cross hairs," he told the NYT. "America has the sweetest diet in the world. You can't get to be as big as we've gotten without added sweeteners."

Studies have shown that one-third of American adults are obese, a condition that leads to diabetes and higher risks of cancer, heart disease and stroke. The FDA will allow food companies to make these changes on their own, but will leave the proposal open for public comment for 90 days. If officially adopted, it would take months to put the nutrition label changes into effect.