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Friday, 24 July 2015

Does a high fat diet cause insulin resistance in a diabetic ?

Over the years, certain low carb and or fat phobic low carb higher fat antis, have said a high fat diet causes insulin resistance. Many of these people who have said this, have talked about the so called pizza effect, and love to quote Gary Scheiner a diabetic and diabetes expert. Gary has a great deal of trouble controlling his blood glucose, as detailed in my thread today called 'Nobhead aka Pinocchio never gives up' I have stated many times dietary fat does not cause insulin resistance for a diabetic and given the reasons I believe this to be true. When eating a high carb high fat diet (the worst possible combination) BG control can be difficult, because it can totally alter the insulin profile. BG can look good at one or two hours, but be way too high three, four or even more hours. The reason for this is because the fat has slowed down digestion markedly, and BG can still be rising long after the fast acting insulin has stopped doing it's job. (insulin using/injecting diabetics)

Now, knowing the low carb higher fat antis hold Gary Scheiner in such high esteem, I thought I would check out Gary's take on this, he says.

"Sometimes, food doesn't digest all that quickly. Especially when it contains a great deal of fat, or you consume a lot of it at one time. Fat slows the rate at which food empties from the stomach into the intestines, where it is then absorbed into the bloodstream. Likewise, large volumes of food take longer to pass through the stomach than smaller quantities. If you consume multiple slices of pizza, or the pizza is laden with fat-filled toppings like sausage or extra cheese, you can expect the carbs to take a few hours longer than usual to "kick in".

When we give a bolus of rapid-acting insulin (either via injection or a pump), the insulin usually starts to work in about 15 minutes, peaks in 60-90 minutes, and finishes in about three to four hours. This activity profile works fine if the food you are eating digests fairly rapidly. When the food digests slowly, a normal meal bolus may peak too early – resulting in a blood sugar drop followed by a blood sugar rise a few hours later when the food is finally absorbed but the bolus is fading"

So, low and behold I agree very much with Gary. Now what about the insulin resistance, you may be thinking. Gary goes onto say. Link to information here.

"The final insult brought on by high-fat foods like pizza is the prolonged, gradual blood sugar rise that occurs many hours after eating. And guess's not carbs that are causing the rise. It's the fat. But not directly. Here's how. High fat meals and snacks cause an increase in serum triglycerides for many hours. When the liver is confronted by large amounts of triglycerides, it becomes resistant to insulin. And that results in greater secretion of glucose by the liver. Without a concurrent increase in insulin, blood sugar levels are going to go up, up, up."

This is where Gary and the Bonkers and Nobheads of this world get it wrong. A high fat low carb meal does not raise serum triglycerides, as detailed here.

"Doubling saturated fat in the diet does not drive up total levels of saturated fat in the blood, according to a controlled diet study. Increasing levels of carbohydrates in the study diet promoted a steady increase in the blood of a fatty acid linked to higher risk for diabetes and heart disease."

However, increasing levels of carbohydrates in the diet during the study promoted a steady increase in the blood of a fatty acid linked to an elevated risk for diabetes and heart disease.

Link to information here.

The informed reader knows, serum triglycerides means blood fat or fat in the blood. Over the years many things have been stated by people going on a true low carb diet. Almost universally is a reporting of drastically reduced trigs levels. Carbs raise trig levels not saturated fat, full stop.

So, as previously stated the worst possible combination for a diabetic, looking to get non diabetic BG numbers control, is a high carb high fat diet. This sort of diet is guaranteed to raise trigs and bring about insulin resistance. Just the sort of diet the average poorly controlled diabetic is using. Hang on a minute when did the antis mention they eat a high fat diet you may be wondering. Just look at what they say they eat, they are eating more fat than they realise I reckon, and just like Gary Scheiner they struggle to get truly safe control of blood glucose levels. The NHS audited stats say 93% of type one diabetics (all insulin users) fail to get to a safe HbA1c, only to be expected when following the standard dietary advice from the NHS and the likes of Gary Scheiner, Sid Bonkers, Nobhead et al.

Above information from here.



tess said...

it always chaps my hide when a food (very often a JUNKfood) that is both high fat and high carb is found to be "unhealthy" BECAUSE OF THE FAT. Nothing wrong with a bacon double cheeseburger at all, if you take away the bun....

Linda said...

Interesting post. I have been told I am at risk for diabetes. For years I avoided fat and I seem to have lost my ability to digest it. Bataine and enzymes give me heartburn so it's a dilemma. I now think restricting fat too much is risky.

Lowcarb team member said...

Hi Tess - I love a bacon cheeseburger, minus the bun !

Thanks for your comment, hope your weekend is going well.

All the best Jan

Lowcarb team member said...

Hello Linda, and welcome to the low carb diabetic blog. I hope you will find the different articles, posts, recipe ideas we feature on the blog useful. A reduced carbohydrate, higher healthy fats and moderate protein menu plan may well help you, just find the balance that suits you. Do have a look at the many articles, we also have the low carb diabetic forum which may be of interest to you. Find it here

Have a happy weekend

All the best Jan