Habitual Diets of Real Americans
This will be a revolving blog post, that shall get bumped up every time I add a study where habitual intake -- aka baseline -- has been determined/reported prior to a dietary intervention. It's time to collect this data in one place, as in study after study, I have noted that Americans are not eating a low fat diet, nor a particularly high carb diet, despite the very modest percent reductions in NHANES surveys. I reserve the right to add in studies in industrialized/Westernized populations as honorary dietary Americans. Newest additions will be on top.
In type 2 diabetes, randomisation to advice to follow a low-carbohydrate diet transiently improves glycaemic control compared with advice to follow a low-fat diet producing a similar weight loss
H. Guldbrand, B. Dizdar, B. Bunjaku, T. Lindström, M. Bachrach-Lindström, M. Fredrikson, C. J. Östgren and F. H. Nystrom
Note: Swedish study, 2012 publication
- 61 Type 2 diabetics, mean BMI 32.7 ± 5.4 kg/m2, mean HbA1c 57.0 ± 9.2 mmol/mol
- Broken into two study groups assigned LF or LC diet.
- LF n=31, age 62.7 ± 11 yrs, 13M/18F, duration of known diabetes 8.8 ± 6.2 yrs. LC n=30, age 61.2 ± 9.5 yrs, 14M/16F, duration of known diabetes of 9.8 ± 5.5 yrs.
- Combined age ~62, 27M/34F
I approximated an average for all 61 subjects at right since these were reported intakes at baseline and assigned group shouldn't have mattered. On average, approximately (alcohol missing from data):
Diet % P~C~F 19~45~35
Notes: Despite being given measurement devices, under-reporting seems likely.
Limited effect of dietary saturated fat on plasma saturated fat in the context of a low carbohydrate diet.
Forsythe CE, Phinney SD, Feinman RD, Volk BM, Freidenreich D, Quann E, Ballard K, Puglisi MJ, Maresh CM, Kraemer WJ, Bibus DM, Fernandez ML, Volek JS.
Subjects: Eight men, aged 38–58 years old, with BMI of 25–35 kg/m2
Assessment: Self-reported 3-day dietary record (logging presumed)
Diet % P~C~F 25~34~41
Notes: There appears to be about 20% under-reporting of baseline intake as test diet intakes were roughly 2500 cal/day. Prior to the test phases, subjects consumed a "free living LC diet" for 3 weeks to determine weight stable intake.