Ben Bikman
presented in the IIQ Metabolic Classroom, June 15, 2021
The idea that grains & whole grains are healthy is
based almost exclusively on correlational studies...
correlational studies can only find a coincidence
causal or clinical studies can actually find the cause
correlational studies are the kind that:
-hand people a questionnaire
-then look at their health
PURE study (correlational study):
-massive in scope
-multi-country
-18,000 participants
-over past few years
Results: higher grain consumption
predicted higher mortality!
challenges prevailing view about grains
"As basic scientist, I prefer to do intervention studies...
then able to show the cause of the outcomes"
Intervention study, 1987, Gerald Reaven (Stanford Univ)
What does a low fat, high carb diet do to someone
with type 2 diabetes?
This study put people on ADA diet, including:
-whole grains
-low fat
Conclusion after 2 week study of this low fat, high carb
& lots of whole grains (similar to ADA recommendation):
"have deleterious metabolic effects
when consumed by patients
with type 2 diabetes"
Directly challenges the idea that whole grains are
somehow going to "magically give better health"
Another study: randomized, control-group:
comparison of DASH diet and higher fat DASH diet
DASH diet is the most famous heart-healthy diet
DASH=Dietary Approaches to Stop Hypertension
DASH diet has pillars:
-more fruits & vegetables
-low fat foods & whole grains
-1 group on low carb & high fat DASH
and essentially no whole grains
Emphasis:
eat more meat & eggs
& less whole grains
So, these popular markers of blood health & overall
mortality got significantly better in the group that:
-cut whole grain consumption &
-increased saturated fat by eating
more meat & eggs
More causal evidence that challenges the long held
correlational evidence that:
whole grains are "magically healthy foods"
They are not!
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