Insulin resistance causes many problems throughout the body, so addressing it has a sizeable impact on our health. One way in which insulin resistance can cause problems is through circadian disruption. A new study found that insulin is the feeding cue that synchronizes feeding with the master clock.
To me, there’s nothing even remotely as exquisite as the circadian system. When researchers describe it as a symphony orchestra, they really couldn’t be more accurate. Every cell, tissue, organ, signaling molecule, and hormone really has a part to play.
I don’t believe one can optimize health without taking circadian rhythms in to consideration. This is because it’s really difficult to completely isolate parts of the “orchestra” from others. In the same way, I don’t think you can isolate certain foods or nutrients and say, “This fixes leaky gut” or “This causes leaky gut”.
The reason people fail so miserably at addressing leaky gut is because they ignore the circadian component. The reason it’s so easy to ignore the circadian component is that it’s:
- Difficult to do
- Time consuming
- And doesn’t yield immediate results.
The problem is, ignoring it virtually guarantees no results in the long term.
Insulin, the circadian clock, and leaky gut
There’s no better example of this than looking at the hormone insulin. Once upon a time, we thought there was a circadian clock separate from the master clock called the food entrainable oscillator.
Turns out it may not even exist, and this study identifies insulin as the primary circadian signal from feeding. This puts the problem with insulin resistance in to perspective.
Insulin is released when we eat and levels naturally plummet while we fast. If we’re trying to sync up the master clock to when we eat, there really is no better way. But what effects would we expect to see in the gut?
For one, we’d expect our circadian system to resist leaky gut when we eat. I can think of no worse time to have a leaky gut. Sure enough, the insulin signal helps ready the gut for what’s to come by decreasing leaky gut. Insulin is released before food even hits your stomach.
This makes insulin resistance a pretty big problem for leaky gut. Insulin resistance means your cells aren’t responding to insulin. If the cells in your gut aren’t listening, how would they know to prevent leaky gut?
Insulin resistance, hyperglycemia, and leaky gut
A recent study which I’ve referenced more than a dozen times illustrates this nicely. High blood glucose in mice causes leaky gut. But if they’re treated with insulin at the same time, no leaky gut. In humans, HgA1c is the strongest predictor of bacterial invasion from leaky gut. HgA1c essentially functions as a 3 month average of blood glucose levels.
Chronically high insulin, which precedes elevated glucose and Type 2 diabetes, slows GI motility. This causes problems such as:
- Delayed gastric emptying
- Acid damage to the stomach
- Damage to the duodenum
So first you see motility impairment, which proceeds to leaky gut and much larger problems.
And there are other problems as well. Artificial sweeteners stimulate insulin without the effect on blood glucose. So they can screw this signal up. That’s because there appears to be communication between taste receptors in the tongue and the pancreas.
Therefore, you can consume as much fiber, glutamine, and probiotics as you want. You can even avoid gluten, dairy, soy, or whatever you feel causes leaky gut.
But if you don’t fundamentally address insulin sensitivity and behavior to match up with the circadian cycle, you’ll never solve your leaky gut problem.