Every food package has a table of nutrition facts. The government has talked about making this
information larger, easier to see and read.
But which of these facts is most important? Is it the number of calories, the amount of
fat, the amount of sodium, the vitamin content, or something else? I contend that the most important number by
far is at the top of the label, serving size or servings per container.
One reason that this is very important is that it makes
sense of the rest of the numbers. As an
interesting example take a single frozen 16 oz. Marie Callender’s Creamy
Mushroom Chicken Pot Pie. It proudly shows
on the front of the box only 430 calories, 10% saturated fat, 600mg sodium, and
4g sugars. Except that the saturated fat
may be a little high, this looks like a pretty healthy meal. (The small print on the front of the box
right above this display of good diet news says:
PER 1 CUP SERVING.) The first
clue should be the 16oz size. That may
seem a little much, but it is chicken and vegetables and crust, and it's only a single pie.
The detail on the back, under the “Nutrition Facts,” states
“Serving Size 1 Cup (200g)” and “Servings Per Container about 2” – about
2! In fact there are 456 grams in 16oz – that information can also be found on the front of the package – so servings per container is a little
more than 2 and a quarter. The effect of
this new information is astounding! The
package really contains more like 980 calories, plus almost 115% of daily recommended
saturated fat, almost 1370mg of sodium and more than double the sugar. It’s still only one pie. Someone might reasonably expect to eat it in
one sitting rather than eat half now and reheat the other half tomorrow or
split it with someone else. Cutting a
pot pit in half is not the easiest thing to do – it’s semi-liquid
inside. Who would think of doing
this? If you don’t though, all the
promises on the front of the package are pretty hollow. Marie Callender didn’t lie; but without exercising
a little more than ordinary care, it’s very easy to be fooled and eat way too much while believing you are eating responsibly.
This is not an isolated case. Every food package has this information, and
it must be all put together to get the entire picture. Another example where the honest
representation can be tricky comes from breakfast cereal. A 23.5oz box of raisin bran and an 18oz box
of bran flakes are about the same size and cost about the same. The raisin bran box says it contains 11
servings, the all bran 18. How does that
work? They are sold by weight and
raisins weigh more than flakes. As it turns out, the bran
flakes box is 60% cheaper per serving and contains only about 30% of the
sugar.
Now some people have as much faith in serving size labels as
they do in the MPG window sticker on a new car.
No one drives that way and no one eats that way. You can believe the numbers or not, but none
of the other important information makes any sense without first considering serving size.
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