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Those healthy fats aren’t as healthy as you believe

Posted by Dr Sandy on in Obesity | 271 Views | 1 Response

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Transcript of “What are healthy fats ?”

defining a healthy fat

Now, it’s okay to eat fats, as long as they’re “healthy” fats. Which leads to the million dollar question, what are “healthy” fats ?

The secret to being healthy………….

It used to be, go LOW FAT.

The growing popularity and success, of low carb diets, has led to a slight reframe of the message.

Now, it’s okay to eat fats, as long as they’re “healthy” fats.

Which leads to the million dollar question, what are “healthy” fats ?

The quick answer, would be anything that is not a saturated fat or a trans-fat, put another way, vegetable fats are good for you.

But are they ?

A team of researchers from the Riverside campus of the University of California, decided to pit an unsaturated fat, against a saturated fat, to see which fat was best.

Battle of the fats

As their unsaturated fat, the team selected soybean oil. The reason, they chose this particular vegetable oil, it is most widely used in the production of processed foods i.e. we’re eating a lot of it. It’s in margarine, salad dressings and snack foods, it is also the oil, most commonly used by restaurants.

As the saturated fat, they chose coconut oil. Admittedly, not an oil which is traditionally associated with the saturated fat camp, but a solid choice, with the added advantage of being pretty much the same, from batch to batch.

NOTE : Lard, the more traditional saturated fat option, is quite variable, it’s exact composition, is a function of the diet of the animal, from which it is being derived.

The two different fats, were fed to hungry male mice from the c57/BL6 clan…..

Fat for dinner

For the mice, it was an all you can eat buffet of mice pellets, served up twice weekly, for 35 weeks.

The only difference between the pellets, was in the oil mix.

  • Group 1 – the pellet had 25 g of soybean oil and 220 g of coconut oil, mixed in
  • Group 2 – the pellets had 115 g of soybean oil and 130 g of coconut oil, mixed in

As far as the mice were concerned, the pellets tasted great.

Okay, great might be a stretch, but the mice did tuck into them and there was no difference in pellet consumption, between the two groups.

But, there was a difference in their health, 35 weeks later.

Fatties and thinnies

The mice munching on soybean oil were………………..

You’re expecting me to say thinner. No, they weren’t.

They were in fact, significantly heavier. The difference between the two groups of mice, was close to 10 g.

And, as expected, the heavier mice, had more metabolic problems….

  • They showed signs of being insulin resistant, struggling to keep their sugar levels in line
  • Their livers accumulated lots of fat, and the lipid droplets inside their livers, were HUGE

But, it was a case of heavier with a “twist”

The “twist”

They had lower cholesterol levels.

Go figure………… every other health biomarker was screaming, HEALTH CRISIS, with this one exception.

How could this be ?

The team demonstrated the soybean diet, changed liver chemistry significantly. Probably not a big surprise, considering the appearance of changes in liver morphology. They reported, genes belonging to the cytochrome P450 genes, especially the cyp3a and cyp2c families were disrupted.

DISRUPTED !

The lower cholesterol level, was due to overall liver DIS-RUPTION.

Oops.

Troubled livers

High cholesterol is associated with heart disease, but……………

Putting your liver at risk, to lower your cholesterol level, doesn’t sound terribly healthy.

Especially, when you realize, cardiovascular disease, is an inflammatory disease. Cholesterol is not causing the inflammation, something else is……

The something is very often, HIGH SUGAR levels.

Mmm…… upset livers, frequently have trouble handling sugars.

In fact, the team identified the pdk4 gene, which codes for pyruvate dehydrogenase, as one of the genes whose functioning was disrupted, in the mice eating lots of soybean oil. When this gene is disrupted, the liver shifts to making more glucose, via the process of gluconeogenesis.

And more glucose, means HIGHER SUGAR levels. Eish !

Healthy fats are natural

Soybean oil, corn oil, sunflower oil, canola oil – none of these polyunsaturated fats are NATURAL.

They’re NOT THE SOLUTION, they’re part of the problem.

Fats should be part of your diet………….in fact, to overcome insulin resistance, you want to

Cut the Carbs and Add protein, FAT and fibre.

When adding fats, use “natural” as your guiding principle, think – meat, milk, eggs, olive oil, avocado.

For more tips and strategies on how to overcome insulin resistance, download our free report.

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Soybean Oil Is More Obesogenic and Diabetogenic than Coconut Oil and Fructose in Mouse: Potential Role for the Liver. PLOS ONE (2015) 10 (7): e0132672. Poonamjot Deol, Jane R. Evans, Joseph Dhahbi, Karthikeyani Chellappa, Diana S. Han, Stephen Spindler, Frances M. Sladek. 

Further reading

a low fat diet spiking blood fat levels

The more saturated fat you eat, the lower your blood fat levels

The fatty acid implicated in health troubles is palmitoleic acid.  A diet high in carbs, raises their levels, a diet high in saturated fats, keeps them low.

liver cooking up a storm

Home made fats, not dietary fats are to blame for health troubles

The chemistry of fats is complicated.  High fat levels are not because you stacked your plate with butter, meat, cream and eggs –  your body made those fats.

burned fat exiting the body

Where does all the fat you burn while on diet, actually GO

When fats are burned, they’re consumed by FIRE, generating heat.   It makes sense.  But, this picture of fat burning, is not scientifically accurate…..

 

Interested in learning more about the chemistry behind metabolic syndrome ?

NOTE : Privacy & spam policy. Spoonful of Science will not rent, trade or sell the e-mail list to anyone. You can unsubscribe at any time by following the unsubscribe link.

 

Posted in Obesity | Tagged cholesterol, coconut oil, glucose, healthy fats, insulin resistance, liver, low fat, meat, milk, saturated fat, soybean oil, sugar levels, unsaturated fat

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