Men and women belong to the same species and need to eat basically the same food.

So why are there womens nutrition bars?

The answer is a teensy smidgen of science and a whole lot of marketing.

For example, women need more iron than men.

(The label percentages are always based on whoevers need is higher; in this case, womens.)

But are you really in danger of iron deficiency if you buy the mens bars?

I think of them as vitamin-supplemented cookies, says New York University nutrition and food studies professor Marion Nestle.

The foods take care of them.

It goes both ways, too.

The Stereotype-Driven Business of Selling Nutrition Bars to Women| Racked

Photo bytheimpulsivebuy.