Eating less will help you live

A new study has suggested that reducing caloric intake can result in prolonged life.

From Scientific American:

"Researchers report in the journal Cell that the phenom is likely linked to two enzymes—SIRT3 and SIRT4—in mitochondria (the cell's powerhouse that, among other tasks, converts nutrients to energy). They found that a cascade of reactions triggered by lower caloric intake raises the levels of these enzymes, leading to an increase in the strength and efficiency of the cellular batteries. By invigorating the mitochondria, SIRT3 and SIRT4 extend the life of cells, by preventing flagging mitochondria from developing tiny holes (or pores) in their membranes that allow proteins that trigger apoptosis, or cell death, to seep out into the rest of the cell."

I wonder if this could be used as an implication for why women live longer than men in general? Perhaps because they eat less in general?