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Friday 14 February 2014

The Full-Fat Paradox: Whole Milk May Keep Us Lean

I have to admit, I melt at the creaminess of full-fat yogurt.

It's an indulgence that we're told to resist. And I try to abide. (Stealing a bite of my daughter's YoBaby doesn't count, does it?)

The reason we're told to limit dairy fat seems pretty straightforward. The extra calories packed into the fat are bad for our waistlines — that's the assumption.

But what if dairy fat isn't the dietary demon we've been led to believe it is? New research suggests we may want to look anew.

Consider the findings of two recent studies that conclude the consumption of whole-fat dairy is linked to reduced body fat.

In one paper, published by Swedish researchers in the Scandinavian Journal of Primary Health Care, middle-aged men who consumed high-fat milk, butter and cream were significantly less likely to become obese over a period of 12 years compared with men who never or rarely ate high-fat dairy.

Yep, that's right. The butter and whole-milk eaters did better at keeping the pounds off.

"I would say it's counterintuitive," says Greg Miller, executive vice president of the National Dairy Council.

The second study, published in the European Journal of Nutrition, is a meta-analysis of 16 observational studies. There has been a hypothesis that high-fat dairy foods contribute to obesity and heart disease risk, but the reviewers concluded that the evidence does not support this hypothesis. In fact, the reviewers found that in most of the studies, high-fat dairy was associated with a lower risk of obesity.

"We continue to see more and more data coming out [finding that] consumption of whole-milk dairy products is associated with reduced body fat," Miller says.

It's not clear what might explain this phenomenon. Lots of folks point to the satiety factor. The higher levels of fat in whole milk products may make us feel fuller, faster. And as a result, the thinking goes, we may end up eating less.

Or the explanation could be more complex. "There may be bioactive substances in the milk fat that may be altering our metabolism in a way that helps us utilize the fat and burn it for energy, rather than storing it in our bodies," Miller says.

Whatever the mechanism, this association between higher dairy fat and lower body weight appears to hold up in children, too.

As we reported last year, a study of children published in the Archives Of Diseases in Childhood, a sister publication of the British Medical Journal, concluded that low-fat milk was associated with more weight gain over time.

"It really surprised us," study author Mark DeBoer, a pediatrician at the University of Virginia, told us.

So, where does this leave us, the rule-followers, who have complied with the skim-milk-is-best edict?

Well, opinions differ. The recommendations that led to the fat-free dairy boom were, in part, born out of concerns about cholesterol.

Whole-milk dairy products are relatively high in saturated fat. And eating too much saturated fat can increase the risk of heart disease. So many experts would agree that adults with high cholesterol should continue to limit dairy fat.

But it's also becoming clear that there are benefits to full-fat dairy, too, at least for some consumers.

As we've reported, in addition to the body weight association, organic whole milk contains beneficial omega-3 fatty acids.

It's unclear whether more people are opting for whole milk products. Though nonfat and low-fat still dominate dairy sales, the organic sector is experiencing an uptick in whole-fat sales.

"We definitely in the last few years are seeing a trend toward the whole-fat products," George Siemon, CEO of farmer-owned Organic Valley, told us. His company's sales of whole-fat milk are up 10 percent, he says. And sales of skim milk have trailed off. Also, there's been a boom in butter sales.

So, stay tuned. Though it's a sounds-too-good-to-be-true finding, researchers are continuing to investigate how dairy fat may help people control their weight.



Anonymous said...

Since early in childhood I have always had full fat milk. Many friends now purchase the skimmed milk, I do not like the taste for me it has a watered down taste, which is what it is.
Children need the benefit of full fat milk, I think many reports have scared us off drinking full fat milk. It is the same with yoghurts full fat and not low fat always taste creamier to me. If anything is low fat look at the sugar content on the label it will be higher.
Full fat satiates better you do not want to eat so much, better for our health. Is this why when I was bought up we had three good meals a day, no eating in between we didn't need it. A snack could have been a glass of full fat milk, build up our bones my mother used to say.
What we think we know now may not always be correct. I was taught Mother knew best and I think back to the 50's and 60's this saying was quite right. But a different age when mothers were at home, fathers provided, the world now has not always improved for the best. But best for me and my family I think is full fat milk, none of us are fat. Fat does not mean fat but some think it does.


Lowcarb team member said...

Hi Margret

I was the same same full fat milk was all we had when I was a child,I remember having to leave cups out for the milkman to cover the bottles or by the morning the bluetits would have pecked the tops to get at the cream,there was very few overweight people in those days.


Anonymous said...

With higher levels of fat in whole milk products it should allow us to feel fuller, faster, and for longer. This means satiation which results in requiring less less.

Unknown said...

I have a friend in her 80's who recalls her childhood on a farm in Western Australia - every morning a blue tongue lizard would be waiting impatiently in the barn for his "share" from the freshly milked house cow. The story always makes me smile.

Beachbag said...

I always fed my kids full cream milk and the blue tits knew just where to come to collect breakfast, lol, but when I became diabetic, I put myself on the skimmed advised by NHS (National How to commit Suicide party).....until I learned to think for myself! Rather late in life but never too old to learn ;)
Geri :)