"I don't know anyone who eats half a cup of ice cream," Katherine Tallmadge, a registered dietitian and op-ed contributor to Live Science, told the Huffington Post. “Instead, one cup is reasonable.”
Serving sizes were originally established in the 1970s and ’80s, but since then, average calorie consumption has changed drastically, from 2,100 calories a day three decades ago to 2,600 calories a day now, according to USDA data.
If the changes are approved, they would go into effect next year. However, companies would have up to two years to change their labels, so we wouldn’t actually see new serving sizes for quite a while.