In the face of contradictory evidence
December 4, 2010 11:00 AM Subscribe
posted by peacheater (74 comments total)
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From the journal Nutrition, a paper(pdf)
criticizing the new American dietary guidelines.
From the paper:
It is of interest to consider the opinion of the American Medical Association (AMA) with respect to the first implementation of dietary guidelines. In an editorial, it was stated:
We believe that it would be inappropriate at this time to adopt proposed national dietary goals as set forth in the Report on Dietary Goals for the United States. The evidence for assuming that benefits to be derived from the adoption of such universal dietary goals as set forth in the Report is not conclusive and there is potential for harmful effects from a radical long-term dietary change as would occur through adoption of the proposed national goals. The guidelines recommended at that time show great similarity to the current recommendations:
The Report sets forth six dietary goals of the United States.
These goals are as follows:
1. Increased carbohydrate consumption to account for 55% to 60% of energy (caloric) intake.
2. Reduce overall fat consumption from approximately 40% to 30% of energy intake.
3. Reduce saturated fat consumption to account for about 10% of total energy intake; and balance that with polyunsaturated and monounsaturated fats, which should account for about 10% of energy intake.
4. Reduce cholesterol consumption to about 300 mg/day.
5. Reduce sugar consumption by about 40% to account for about 15% total energy intake.
seled to be in the care of a physician who can offer dietary advice
6. Reduce salt consumption by 50% to 85% to approximately 3 gm/day
In the three decades since, carbohydrate consumption has increased; overall fat, saturated fat, and cholesterol consumption have decreased to near or below targeted levels; caloric intake
remains within recommended levels; and leisure-time physical activity has increased slightly (pp. D1-1, D3-10, B2-3). At the same time, scientific evidence in favor of these recommendations remains inconclusive, and we must consider the possibility that the “potential for harmful effects” has in fact been realized. Notably, “the prevalence of overweight and obesity in the US has increased dramatically in the past three decades” (A4); the number of Americans diagnosed with T2D has tripled.