NCBI ROFL: "No sh*t, Sherlock": weight loss edition.

By ncbi rofl | May 26, 2011 7:00 pm

Portion size of food affects energy intake in normal-weight and overweight men and women.

Large portions of food may contribute to excess energy intake and greater obesity. However, data on the effects of portion size on food intake in adults are limited.

We examined the effect of portion size on intake during a single meal. We also investigated whether the response to portion size depended on which person, the subject or the experimenter, determined the amount of food on the plate.

Fifty-one men and women were served lunch 1 d/wk for 4 wk. Lunch included an entrée of macaroni and cheese consumed ad libitum. At each meal, subjects were presented with 1 of 4 portions of the entrée: 500, 625, 750, or 1000 g. One group of subjects received the portion on a plate, and a second group received it in a serving dish and took the amount they desired on their plates.

Portion size significantly influenced energy intake at lunch (P < 0.0001). Subjects consumed 30% more energy (676 kJ) when offered the largest portion than when offered the smallest portion. The response to the variations in portion size was not influenced by who determined the amount of food on the plate or by subject characteristics such as sex, body mass index, or scores for dietary restraint or disinhibition.

Larger portions led to greater energy intake regardless of serving method and subject characteristics. Portion size is a modifiable determinant of energy intake that should be addressed in connection with the prevention and treatment of obesity.”

Photo: flickr/emdot

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CATEGORIZED UNDER: duh, eat me, NCBI ROFL, told you so
  • Klortho

    Sorry, guys, this isn’t good rofl material — it’s actually a pretty important result. If you read the study, you’ll see that they’re talking about portion sizes that are larger, generally, than a person would normally eat. In other words, when there’s already more than enough food, does further increasing the portion size cause a person to eat *even more*.

  • Michael Sternberg

    Klortho: Sure, hard data are nice to have, but it’s still kinda obvious and the headline is funny as hell.


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NCBI ROFL is the brainchild of two Molecular and Cell Biology graduate students at UC Berkeley and features real research articles from the PubMed database (which is housed by the National Center for Biotechnology information, aka NCBI) that they find amusing (ROFL is a commonly-used internet acronym for "rolling on the floor, laughing"). Follow us on twitter: @ncbirofl


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