Dairy consumption does not elevate heart-attack risk, study suggests
Dairy products can be high in harmful saturated fat but not necessarily in risk to the heart. A newly published analysis of thousands of adults in Costa Rica found that their levels of dairy consumption had nothing to do statistically with their risk of a heart attack.
"Things like milk and cheese are very complex substances," said Stella Aslibekyan, a community health graduate student at Brown University and the lead author of the study, published in advance online May 4 in the journal Nutrition, Metabolism and Cardiovascular Diseases. "We looked at [heart attack risk and] dairy products in their entirety and then looked at separate components of those dairy products, including fats, and it turns out that the results are null. Perhaps the evidence is not there."
Rather than suggesting that the saturated fats in dairy products are harmless, Aslibekyan and co-author Ana Baylin, an adjunct assistant professor of community health at Brown, hypothesize that other nutrients in dairy products are protective against heart disease, for all but perhaps the highest dairy consumption quintile in their study. The potentially beneficial nutrients include calcium, vitamin D, potassium, magnesium and conjugated linoleic acid (CLA).
To conduct the study, Aslibekyan and Baylin analyzed data on 3,630 middle-aged Costa Rican men and women who participated in an epidemiological study between 1994 and 2004 by co-author Hannia Campos of the Harvard School of Public Health.
They split the study population between two equal groups: 1,815 "cases" who had non-fatal heart attacks and 1,815 comparable "controls" who did not. The researchers looked not only at the subjects' self-reported dairy intake, but also at measurements of dairy fat biomarkers, namely 15:0 and 17:0, in their bodies.
What they found is that the dairy intake of people who had heart attacks was not statistically different than the intake of people who did not. After breaking people into quintiles, based on their dairy consumption amount, there was no significant linear relationship between consumption and heart risk, even among the most voracious consumers. The highest consumption quintile consumed an average of 593 grams of dairy foods a day.
When the researchers controlled for such risk factors as smoking, waist-to-hip ratio, alcohol intake, and physical activity, the lack of a statistically significant association between dairy intake and heart attack risk remained. They also tracked and adjusted the data for levels of CLA and calcium and found they may have a protective effect. Protective effects lessened in the highest quintile, however.
Baylin likened the nutritional complexity of dairy products to that of eggs, which were once a source of intense consumer concern because of their cholesterol content, but are now viewed in a more complex way because they, too, have seemingly protective nutrients.
"The message is that it is important to look at the net effect of whole foods and dietary patterns and not only isolated nutrients" Baylin said.
Provided by Brown University
- Advertisements saying dairy products help you lose weight are misleading May 02, 2008 | not rated yet | 0
- Some evidence that diets high in calcium and dairy products in childhood may lower mortality Jul 28, 2009 | not rated yet | 0
- Kids still not drinking enough milk Oct 04, 2007 | not rated yet | 0
- New study shows calcium significantly improves children's bone health Jul 30, 2008 | not rated yet | 0
- Lactose intolerance rates may be significantly lower than previously believed Nov 05, 2009 | not rated yet | 0
- Motion perception revisited: High Phi effect challenges established motion perception assumptions Apr 23, 2013 | 3 / 5 (2) | 2
- Anything you can do I can do better: Neuromolecular foundations of the superiority illusion (Update) Apr 02, 2013 | 4.5 / 5 (11) | 5
- The visual system as economist: Neural resource allocation in visual adaptation Mar 30, 2013 | 5 / 5 (2) | 9
- Separate lives: Neuronal and organismal lifespans decoupled Mar 27, 2013 | 4.9 / 5 (8) | 0
- Sizing things up: The evolutionary neurobiology of scale invariance Feb 28, 2013 | 4.8 / 5 (10) | 14
Classical and Quantum Mechanics via Lie algebras
Apr 15, 2011 I'd like to open a discussion thread for version 2 of the draft of my book ''Classical and Quantum Mechanics via Lie algebras'', available online at http://lanl.arxiv.org/abs/0810.1019 , and for the...
- More from Physics Forums - Independent Research
More news stories
People eating at fast food restaurants largely underestimate the calorie content of meals, especially large ones, according to a paper published today in BMJ.
Health 16 minutes ago | not rated yet | 0
Don't doubt it when a woman harried by hot flashes says she's having a hard time remembering things. A new study published online in Menopause, the journal of The North American Menopause Society (NAMS), helps confirm with o ...
Health 1 hour ago | not rated yet | 0
The Senate has overwhelmingly rejected an amendment allowing states to require labeling of genetically modified foods.
Health 1 hour ago | not rated yet | 1
(AP)—McDonald's once again faced criticism that it's a purveyor of junk food that markets to children at its annual shareholder meeting Thursday.
Health 2 hours ago | not rated yet | 0
Can economic incentives such as gift cards, T-shirts, and time off from work motivate members of the public to increase their donations of blood?
Health 4 hours ago | not rated yet | 0 |
Treatment with high potency statins (especially atorvastatin and simvastatin) may increase the risk of developing diabetes, suggests a paper published today in BMJ.
16 minutes ago | not rated yet | 0
Two out of five medical students have an unconscious bias against obese people, according to a new study by researchers at Wake Forest Baptist Medical Center. The study is published online ahead of print in the Journal of ...
45 minutes ago | not rated yet | 0
International efforts to combat a new pneumonia-like virus that has now killed 22 people are being slowed by unclear rules and competition for the potentially profitable rights to disease samples, the head ...
46 minutes ago | not rated yet | 0
(HealthDay)—In patients who have previously been considered difficult to image, dual-source cardiac (DSC) computed tomography (CT) can identify clinically significant coronary artery disease, according ...
26 minutes ago | not rated yet | 0
(Medical Xpress)—Regulating the distribution of power in neurons is done by a system that makes the national electric grid look simple by comparison. Each neuron has several thousand mitochondria confined ...
1 hour ago | 4 / 5 (1) | 0 |
Even while being dragged to its destruction inside a cell, a cancer-promoting growth factor receptor fires away, sending signals that thwart the development of tumor-suppressing microRNAs (miRNAs) before it's dissolved, researchers ...
2 hours ago | not rated yet | 0 |