Victoria's Secret HATES Fat (and Trans) People?!
What Is Trans Fat—And Why Is It So Bad For You?
What is trans fat?
There are two types of trans fats: naturally-occurring trans fats and artificial trans fat. Animals that produce meat and dairy products (like cows) naturally create small amounts of trans fat in their guts. In turn, trace amount of trans fats wind up in the foods they create. However, there’s not enough research out there to determine the impact these types of trans fats have on your health, according to the American Heart Association (AHA).
Artificial trans fats are a different story, though. These are man-made through a process called hydrogenation, in which hydrogen molecules are added to liquid fats (like vegetable oil) to convert them into solid fats, according to the FDA, resulting in the partially hydrogenated oils you’ve heard so much about.
Why is trans fat added to your food?
PHOs are the most common type of trans fat used in processed foods like cookies, crackers, canned frostings, potato chips, coffee creamer, and fried foods like french fries and donuts. Very little was known about the health impacts of trans fats before 1990, so companies used them because they were cheap, easy to use, had a long shelf-life, and made food taste better, the AHA says.
How does trans fat impact your health?
Foods rich in trans fat tend to be high in added sugar and calories, so they can pave the way for weight gain and type 2 diabetes, according to the U.S. National Library of Medicine.
They’re also bad news for your heart. In a 2015 review and meta-analysis published in theBritish Medical Journal, Canadian researchers looked at 20 studies that analyzed the health impacts of trans fats in several countries. They found that eating artificial trans fats was associated with a 34 percent increase in death fromanycause, a 28 percent increase of dying from heart disease, and a 21 percent increase in the risk of developing heart disease.
But why are they so destructive? Trans fats spike your LDL (or the “dangerous”) cholesterol, which clogs your arteries. At the same time, they cause your HDL (a somewhat protective) cholesterol takes a dip, meaning excess cholesterol can’t be transported back to your liver to be flushed from your body, explains Dana Hunnes, PhD, MPH, RD, senior dietitian at the UCLA Medical Center. This can pave the way for a blood clot, causing a heart attack or stroke. Trans fats also damage the inner lining of your blood vessels, which hampers their ability to function properly, says Hunnes.
Plus, they’ve been shown to increase at least two inflammatory markers and “we now understand that inflammation is a major driver of many chronic diseases, from diabetes to heart disease and metabolic syndrome,” Hunnes says.
The good news is, research shows that banning trans fats makes an impact. Using data from 2002 to 2013 from the New York State Department of Public Health, a study published inJAMA Cardiologyfound that hospital admissions for heart attack and stroke dipped by 6.2 percent in people living in counties with restrictions on trans fats compared to counties without restrictions. The decline became most significant between 2007 and 2011, right after New York City banned the use of trans fats in restaurants.
Each year, trans fat intake leads to 500,000 deaths from heart disease.
Are all types of fat bad for you, though?
Even though the FDA’s ban on trans fats takes effect nationwide this year, you should still be diligent about reading nutrition labels. Make sure partially hydrogenated oils are nowhere to be found on the ingredients list. Remember: They are still permitted to be used in trace amounts—and that can be dangerous. When you go to a restaurant, ask your server about the types of oils they use to fry food or avoid fried foods altogether if they can’t provide nutrition information.
It’s important to note that you shouldn’t confuse trans fats with saturated and unsaturated fats. The U.S. Dietary Guidelines for Americans still recommends that 25 to 30 percent of your daily calories come from fat, with no more than 10 percent stemming from saturated fats. (If you consume about 2,000 calories a day, 500 calories can come from healthy fats from whole eggs, nuts, avocado, and olive oil.) If you have high cholesterol or a family history of heart disease, 5 to 6 percent of your daily diet should come from fat.
While you may have heard that saturated fats are also bad for your heart, they’re not as dangerous as trans fats for the average person. However, foods high in saturated fat tend to be processed, salty, or sugary, so limiting your intake is still important, says Hunnes. The best thing you can do is load up on single-ingredient forms of fat—like avocados, nuts, and olive oil—to reap the most benefits.
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