Jiro comments on Lifestyle interventions to increase longevity - Less Wrong

120 Post author: RomeoStevens 28 February 2014 06:28AM

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Comment author: Pablo_Stafforini 02 March 2014 02:14:14AM *  0 points [-]

I think the best we can hope in this context is to have a number of distinct and precise metrics--like nutrients per calorie, nutrients per dollar and nutrients per bulk--, feed these to intuition, and decide accordingly. In other words, when it comes to food, I think we should make decisions according to a "rational" rather than a "quantified" model, given the difficulties of coming up with adequate definitions of a "serving size". Your approach wouldn't work, I believe, because how much people eat of a given food often depends on the presence or absence of other complement and substitute foods.

Comment author: Jiro 02 March 2014 07:38:45AM -1 points [-]

Googling quickly brings up http://www.cnpp.usda.gov/Publications/NutritionInsights/insight11.pdf

Serving size is defined as follows:

  1. Amount of foods from a food group typically reported in surveys as consumed on one eating occasion;
  2. Amount of foods that provide a comparable amount of key nutrients from that food group, for example, the amount of cheese that provides the same amount of calcium as 1 cup fluid milk;
  3. Amount of foods recognized by most consumers (e.g., household measures) or that can be easily multiplied or divided to describe a quantity of food actually consumed (portion);
  4. Amount traditionally used in previous food guides to describe servings.

While the amount of food people would eat is not the only factor used, it's a major one.

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