Critique #1 questioned the small sample size of the research. I can’t do anything about that, and there’s not much to be said about it, so let’s move on.
Next, I think it’s easiest to address critique #3: How did nutrient deficiencies in the gluten-free population compare to Americans as a whole? To answer that question, I pulled data regarding nationwide averages from the USDA’s Community Nutrition Mapping Project. If I amend yesterday’s table that showed the percent of the gluten-free population who are deficient in given nutrients, and add to it a column for the national averages, this is what you find:
|Nutrient||GF Deficiency||Nationwide Deficiency|
These numbers change the perspective a bit, I think. It’s not simply that the gluten-free population is nutrient deficient. When you compare us to the national averages, it gets slightly more complex. In some cases, such as folate, riboflavin, thiamin, and iron, we’re two or more times as deficient (as a group) than the nation. However, in other cases, such as B12, B6, and calcium, we still have greater rates (more…)