Every time I tracked down a study purporting to prove the benefits of whole grains, the comparison was between people consuming whole grains and people consuming white flour. All we can determine from those studies is that whole grains aren’t as bad for us as white flour. To prove whole grains have real benefits, we’d have to compare people who eat whole grains to people who eat no grains.
… Well, here’s one study that actually measured changes in heart-disease risk factors after feeding subjects whole grains (WG):
A total of 316 participants … were randomly assigned to three groups: control (no dietary change), intervention 1 (60 g WG/d for 16 weeks) and intervention 2 (60 g WG/d for 8 weeks followed by 120 g WG/d for 8 weeks). Markers of CVD risk … were: BMI, percentage body fat, waist circumference; fasting plasma lipid profile, glucose and insulin; and indicators of inflammatory, coagulation, and endothelial function. …120 grams of whole grains … that’s a lot of hearthealthywholegrain goodness. Now let’s look at the results:
Although reported WG intake was significantly increased among intervention groups, and demonstrated good participant compliance, there were no significant differences in any markers of CVD risk between groups. A period of 4 months may be insufficient to change the lifelong disease trajectory associated with CVD. The lack of impact of increasing WG consumption on CVD risk markers implies that public health messages may need to be clarified to consider the source of WG and/or other diet and lifestyle factors linked to the benefits of whole-grain consumption seen in observational studies.Yes, I’d say the public-health messages regarding whole grains need to be clarified. Here’s my version of the clarification:
Sorry … turns out we were wrong about the whole-grain thing.
Friday, March 22, 2013
The "Whole Grains are Healthy" Myth
5-AZA A. Melvin Ramsay Acne Advocacy Alan Light Alternative medicine is an untested danger Ampligen Andrew Wakefield Anecdote Anthony Komaroff Antibiotics Antibodies Anxiety Aphthous Ulcers Apnea Asthma Autism Autoimmune Disease Behçet’s Ben Katz Bertrand Russell Biology Blood sugar Bruce Carruthers Caffeine Calcium Cancer Capitalism Cardiology Carmen Scheibenbogen CBT/GET CDC Celiac Disease Cereal Grains CFIDS Chagas Charité Charles Lapp Christopher Snell Chronix Clinician Coconut Milk Cognition Common Sense and Confirmation Bias Conversion Disorder Coxiella Burnetii Coxsackie Criteria Crohn's Cushing's Syndrome Cytokine Daniel Peterson Darwinism David Bell Depression Diabetes Diagnostic Differential Disease Diseases of Affluence DNA DNA Sequencing Dog DSM5 EBV EEG Eggs Elaine DeFreitas Elimination Diet Enterovirus Epstein-Barr ERV Etiology Evolution Exercise Challenge Faecal Transplant Fame and Fraud and Medical Science Fatigue Fatty Acids Fibromyalgia Francis Ruscetti Fructose Gene Expression Genetics Giardia Gordon Broderick Gulf War Illness Gut Microbiome Harvey Alter Health Care System Hemispherx Hemolytic Uremic Syndrome Herpesviridae High Blood Pressure Historic Outbreaks HIV HPV Hyperlipid Ian Hickie Ian Lipkin Immune System Infection Intermittent Fasting It's the environment stupid Jacob Teitelbaum Jamie Deckoff-Jones Jo Nijs John Chia John Coffin John Maddox José Montoya Judy Mikovits Karl Popper Kathleen Light Kenny De Meirleir Lactose Lamb Laszlo Mechtler LCMV Lecture Leonard Jason Leukemia Life Liver Loren Cordain Low Carb Low-Dose Naltrexone (LDN) Luc Montagnier Lucinda Bateman Ludicrous Notions Lumpers and Splitters Lyme Mady Hornig Mark Hasslett Martin Lerner Mary Schweitzer MCS ME/CFS Medical Industry Medicine is not based on anecdotes Michael Maes Migraine Milk and Dairy Mitochondria MMR Money and Fame and Fraud MRI Multiple Chemical Sensitivity Multiple Sclerosis Mutton My Symptoms n-1 Nancy Klimas Narcolepsy Neurodermitis Neuroscience NK-Cell Nocebo NSAID Nutrition Obesity On Nutrition Pain Paleo Parathyroid Pathogen Paul Cheney PCR Pharmaceutical Industry Picornavirus Placebo Polio Post Exertional Malaise POTS/OI/NMH PTSD PUFA Q Fever Quote Rare Disease Research Retrovirus Rheumatoid Arthritis Rituximab RNA Robert Gallo Robert Lustig Robert Silverman Robert Suhadolnik Rosario Trifiletti Sarah Myhill Sarcasm Science Sequencing Seth Roberts Shrinks vs. Medicine Shyh-Ching Lo Simon Wessely Sinusitis Sjögren's Somnolence Sonya Marshall-Gradisnik Speculation Stanislaw Burzynski Statins Stefan Duschek Study Sucrose Sugar Supplements Symptoms T1DM T2DM There is no such thing as Chronic Lyme There is no such thing as HGRV Thyroid Tinitus To Do Toni Bernhard Tourette's Treatment Tuberculosis Vaccine Video Vincent Lombardi Vincent Racaniello Virus Vitamin B Vitamin D VP62 When Evidence Based Medicine Isn't Whooping Cough Wolfgang Lutz WPI XMRV You fail science forever