Why low-fat salad dressing is depriving you of nutrients

Nadine Bells
Shine OnJune 21, 2012

Think you're making the right choice by reaching for the low-fat dressing at the salad bar? Think again.

If you want to get the most vitamins and nutrients out of your plate of greens, you need to top them with monounsaturated fat-rich dressing, new research out of Perdue University in the U.S. claims.

Also see: Stopping yourself mid-action can make you take fewer risks

If you want to utilize more from your fruits and vegetables, you have to pair them correctly with fat-based dressings," says Mario Ferruzzi, the study's lead author and  associate professor of food science, in a press release. "If you have a salad with a fat-free dressing, there is a reduction in calories, but you lose some of the benefits of the vegetables."

Watch the video explanation below:

In the study, published online in the journal Molecular Nutrition & Food Research, participants ate salads paired with saturated, monounsaturated and polyunsaturated fat-based dressings. The subjects' blood was then tested for absorption of fat-soluble carotenoids, which are associated with reduced risk of cancer, cardiovascular disease, macular degeneration and other chronic and degenerative diseases.

The researchers found that monounsaturated fat-rich dressings required the least amount of fat to get the most carotenoid absorption, while saturated fat and polyunsaturated fat dressings required higher amounts of fat to get the same benefit.

Also see: Moderate drinking in pregnancy has no affect on child's IQ: study

Monounsaturated fat-rich dressings include canola and olive oil-based dressings. A 3-gram serving promoted the same carotenoid absorption as did a 20-gram serving.

Polyunsaturated dressings, however, like those made from soybean oil, required a larger dose of fat on the salad to absorb more carotenoids.

Overall though, the more fat in the salad dressing the better for absorption of nutrients, regardless of what type of fat is in the dressing.

The Atlantic's Brian Fung summarizes the findings: "The higher fat content of richer dressings actually helps unlock vegetables' nutritional potential as they're being digested."

The research may offend fat phobes, but healthy fats are needed for a salad to reach its nutritional potential.

How do you dress your salad? The Globe and Mail lists some of the best oils to use in salad dressings.

Ram Trucks take the heat

Your job isn’t for the faint of heart. When you need a stronger truck, you need up to 900 lb-ft of diesel torque.

The Pomade Games

Betty White Says Goodbye

Betty White says goodbye to 'Hot in Cleveland' - TV Land's first original comedy.

This Artist Is Bringing the Craft Back to Neon

Cher Fans Mourning

Cher fans were upset over the confusing hashtag mix-up that occurred on Twitter.

When the going gets tough. Why Get a Loan From Us?

We keep the tough going with 2,300 convenient locations, 6,500 helpful employees & a 97% customer satisfaction rating. Talk about strength in numbers.

Impressive Driving Range

Go the distance in America’s longest-lasting pickups with an impressive driving range and capability to spare.

Why I'm (Almost) Totally Giving Up Makeup