The size used for comparison was a Russet that’s 52% larger in weight! That is the loophole Sweet Potatoes used to promote superior health benefits. And if it's so simple and obvious, how did so many trusted nutritional professionals and reliable resources get this nutrition fact wrong?

The USDA's website is the root cause of this misinformation. 

Small, medium, and large sizes are most familiar to the general population and easiest to visualize. The problem is the weight for each...