Wed, Nov-29-23, 03:56
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Plan: P:E/DDF
Stats: 225/150/169
BF:45%/28%/25%
Progress: 134%
Location: NC
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US Dietary Guidelines, a total fail.
OK, That's not the title of the study, but it could be 
Compliance with U.S. Government Nutrition Advice and Concurrent Obesity Trends Using NURSES' HEALTH STUDY Data, 1980-2011i, ii, iii
https://www.sciencedirect.com/scien...22316623727302?
Quote:
Conclusions
Guidance from the U.S. Government to limit fat, saturated fat, and cholesterol consumption was widely adopted by American female nurses during the study period. Our results show that compliance with this guidance had little, if any, effect in mitigating population-wide BMI increases during our study period.
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More details from the study's conclusions:
Quote:
Conclusions
Using data from the Nurses Health Studies, this paper analyzed compliance with U.S. Government Nutrition Advice from 1980 to 2011, and the concurrent trends in obesity levels and BMI distributions. American female nurses in the sample, on average, shifted their behavior towards U.S. Government Nutrition Advice on consumption of total fat and saturated fat as a share of total calories, and absolute consumption of cholesterol, with overall compliance with all three recommendations simultaneously increasing from 4% in 1980 to a maximum approaching 60% in 1998. Nonetheless, mean and median BMI for both overall compliers and overall non-complier increased throughout the sample period, with obesity and severe obesity growing disproportionately even as overall compliance remained widespread. We find that the distributions of BMIs shifted such that a larger share of both overall compliers and overall non-compliers became obese and severely obese. We also present data which show no apparent linear association between the Fat Proportion in the diet and BMI, further throwing into doubt the idea that compliance was protective against BMI growth and obesity outcomes. The increases in BMI for female nurses in the Studies are robust regardless of compliance status. Thus, any mitigating effects compliance with U.S. Government Nutrition Advice may have had were dominated by the overall time trend. Further, those potential effects of compliance require additional research to establish whether compliance caused the minimal levels of mitigation observed, as opposed to potential confounders that were not available for control within the data.
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So we complied with the guidelines and got fat. A big oops for the last 40+ years:
" We find that the distributions of BMIs shifted such that a larger share of both overall compliers and overall non-compliers became obese and severely obese. We also present data which show no apparent linear association between the Fat Proportion in the diet and BMI, further throwing into doubt the idea that compliance was protective against BMI growth and obesity outcomes. The increases in BMI for female nurses in the Studies are robust regardless of compliance status. 
Ps, thanks to Brendan ((Grav) who posted this study on FB.
Only a few weeks ago, Demi posted a Harvard study "rethinking" the starchy carb advice.
Last edited by JEY100 : Wed, Nov-29-23 at 05:21.
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