…in the past few decades, scientists have begun to understand that a substantial number of calories are lost in the effort to digest food. For example, meat and nuts are harder to break down, and so the body expends energy trying to digest them.

In the end, some foods are also not fully digested: significant portions are excreted, and so those calories should not be counted, either. Nuts are among the hardest to digest, and estimates of the calories they contain by the old method are the furthest off — the counts are about 25 percent too high, according to recent research by David Baer, a nutrition scientist at the Department of Agriculture.

this is actually good news for me, given my diet consists substantially of nuts, greens, and meat proteins…I guess I can get that second plate of pulled pork

via On Food Labels, Calorie Miscounts – NYTimes.com.