so, we asked nutritionist jax hubbard to help us navigate. jax, where should we start? >> what you want to do with the nutrition label is first start from the top and work your way down. you want to look at how many servings are in the package. all the information that follows is referring to one serving. for example, a small bag of potato chips may look like one serving, but it may be up to 2.5 servings. so, when you look at the rest of the information on the food label, you have to make sure to multiply all those numbers by 2.5. when you're looking at the calories, as a general rule of thumb to figure out how many calories you need in a day, you want to take your weight and multiply it by 20. so, let's say you're a moderately active female, and you weigh 100 pounds. you want to take your weight of 100 pounds and multiply it by 20, which will equal 2,000, which is the amount of calories you want to consume in a day. after looking at the calories, you want to move down to the fats. you want to look at the saturated and trans fats. these are the bad fats, so you want to

and if you're going to drink fruit juice, make sure it's 100% fruit juice. >> thanks, jax.of college that won't accept half the population. >> at first glance, new york's barnard college looks pretty typical for a small school in a big city. located in upper manhattan, the campus is compact, covering just a few city blocks. about 2,400 students come here from all over the world, so therelots of diversity. but all barnard students have one particular thing in common -- they're all women. barnard is what's called a single-sex college. >> there are probably about 60 or 70 all-women's colleges out there in the united states now. and i do think it is very much about really building both women's self-esteem, their confidence levels. >> before you say "no way! not me," keep in mind that single-sex colleges often have close relationships with other schools. in barnard's case, the other school is right across the street -- columbia university. >> there are columbia students taking courses at barnard and barnard students taking courses at columbia. >> back in 1889, when barnard was f