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The unscientific low-fat dairy fetish will not die

So right off there seems to be one glaring, unarguable, and completely avoidable mistake in the guidelines, because they go on and on about low-fat dairy. Full-fat dairy is not part of a healthy dietary pattern (even though Americans don’t eat enough dairy according to the DGAC and the dairy lobby). The trouble is, everyone knows by now that full-fat dairy isn’t associated with any more disease than low-fat diary, and is usually associated with less. This is so uncontroversial that we shouldn’t even feel the need to reference it. But here’s a study from New Zealand, a meta-analysis of randomized controlled trials (RCTs) in which people were told to eat extra dairy. The people who ate low-fat dairy gained more weight than the people who were told to eat full-fat dairy. Here’s a study of fat and type 2 diabetes risk (an observational study of 14.000 people followed for 14 years) using a 7-day food diary, which is a more accurate tool than the food frequency questionnaires (FFQs) the DGAC process largely relies on for its observational evidence; “Total intake of high-fat dairy products (regular-fat alternatives) was inversely associated with incident T2D (HR for highest compared with lowest quintiles: 0.77; 95% CI: 0.68, 0.87; P-trend < 0.001). Most robust inverse associations were seen for intakes of cream and high-fat fermented milk (P-trend < 0.01) and for cheese in women (P-trend = 0.02). High intake of low-fat dairy products was associated with increased risk, but this association disappeared when low- and high-fat dairy were mutually adjusted (P-trend = 0.18). Intakes of both high-fat meat (P-trend = 0.04) and low-fat meat (P-trend < 0.001) were associated with increased risk.” (This last sentence was only true when processed meat was included – fatty red meat wasn’t associated with diabetes at all). And here’s a study using biomarkers of dairy consumption, the most reliable measure of all, to see if dairy fat was associated with heart disease. “Odd chain PFA (15:0, 17:0) concentrations were significantly inversely associated with CHD (OR 0.73, 0.59–0.91, p<0.001, Q4 versus Q1).”

The DASH diet was one of the scientifically tested diets used as part of the evidence base for the “Healthy diet patterns” in the guidelines. It’s a low-fat, low saturated-fat diet high in potassium, antioxidants and fibre from wholegrains, fruits, and vegetables, with low-fat dairy as a protein source. The DASH diet is effective for lowering blood pressure.
This study has just been released (by Ron Krauss’s research group) – it compares the standard DASH diet with a modified DASH diet in which full-fat dairy replaces low-fat (HF-DASH). The diet is now higher in saturated fat. If anything, it seems to be better for you.

Results: Thirty-six participants completed all 3 dietary periods. Blood pressure was reduced similarly with the DASH and HF-DASH diets compared with the control diet. The HF-DASH diet significantly reduced triglycerides and large and medium very-low-density lipoprotein (VLDL) particle concentrations and increased LDL peak particle diameter compared with the DASH diet. The DASH diet, but not the HF-DASH diet, significantly reduced LDL cholesterol, HDL cholesterol, apolipoprotein A-I, intermediate-density lipoprotein and large LDL particles, and LDL peak diameter compared with the control diet.

Conclusions: The HF-DASH diet lowered blood pressure to the same extent as the DASH diet but also reduced plasma triglyceride and VLDL concentrations without significantly increasing LDL cholesterol.

In this Dutch population, higher SFA intake was not associated with higher IHD risks.

Mikä siinä oikein on, ettei evoluutio opeta tutkijoille mitään? Onko nää jotain uskonlahkoa? "Myöhempien aikojen pyhien Ancel Keysen kirkko"?

Haluaisin nähdä, kun lumileopardi laiduntaa päivittäin rypsipellossa ja jättää kanit syömättä. Siinä menisi tämänkin äijän evoluutiopuheet uusiksi.

On se. Ja sitä ruokitaan koko ajan isommalla rahalla. Kannattaa kuulemma.

The official advice — that we should cut our intake of saturated fats, such as butter, to only 10 per cent of our daily diet — ‘should not have been introduced’, experts said. Such revelations have prompted a renaissance for butter.