Is insomnia linked to inflammation?

Yes. People with insomnia had higher CRP, a blood marker of inflammation, and the two share 125 spots in our DNA.

Does poor sleep lead to more inflammation?

The genetic evidence points more strongly from insomnia to higher CRP than from CRP to insomnia.

CRP is a blood marker of inflammation in the body. Doctors can measure it with a blood test.

What is the first-line treatment for insomnia?

Cognitive behavioral therapy for insomnia. Ask your doctor about it before relying on sleeping pills.

Better sleep is good news for inflammation, a large genetic study finds

By Mongevity Desk Published Nov. 3, 2026, 5:55 pm

Sleep healthPart of a story we are following · 11 articles · See every update

A calico cat sleeping on a bed in the Franklin Farm section of Oak Hill, Fairfax County, VirginiaPhoto: Famartin / Wikimedia Commons, CC BY-SA 4.0

Good sleep does more for you than leave you rested. A large genetic study found that insomnia leads to higher levels of CRP, a blood marker of inflammation, more strongly than the other way around.

Your sleep and your inflammation are connected, and sleep is the side you can work on tonight.

How the study worked

Researchers used UK Biobank, a huge health database, and compared people with insomnia to people without it. Then they used several genetic methods to find DNA the two share and to test which one drives the other. One of those methods, Mendelian randomization, uses genes as a kind of natural experiment. It is a genetic study, so it shows the direction of the link and most participants were of European ancestry. The results were published Oct. 14, 2026, in Sleep.

What they found

First, the starting point: CRP was higher in people with insomnia than in the comparison group without it.

Then the genes told a story.

Insomnia and CRP were genetically correlated. Genes that raise the risk of one tend to raise the other.
The researchers found 125 spots in our DNA tied to both.
Those spots pointed to immune signaling, cellular aging, programmed cell death and the way DNA is packaged inside cells.
At six of those spots, the two traits likely share the same genetic change. They sit in or near genes called APOE, HLA-B, NLGN1, AK5/DNAJB4, FAM114A2/GRIA1 and SATB1.
The strongest evidence ran in one direction: from insomnia to higher CRP, more than from CRP to insomnia.

In plain words, the genes say that sleeping badly pushes inflammation up. Sleeping well is on your side.

Why does inflammation matter?

Chronic inflammation is linked to heart disease, diabetes and other conditions of aging. Anything that helps keep it down is worth having, and sleep is free.

If your trouble sleeping lasts weeks or months, cognitive behavioral therapy for insomnia is the first-line treatment and works for many people. It is a good thing to ask your doctor about before you reach for sleeping pills.

What you can do today

Pick one wake-up time and keep it every day this week, weekends included. Set an alarm for it tonight. Each morning, jot down on your phone or a sticky note how long it took you to fall asleep the night before. By the end of the week you will have your own little record of how your nights are going.

Talk about it at home

Scientists looked at the DNA of a huge number of people. They found that sleeping badly and having more inflammation in the body share many of the same bits of DNA. The clues point from poor sleep to more inflammation.

Question for the table

How could we find out whether we feel different after a week of waking up at the same time every day?

Keep exploring

Copies this article and its questions so you can paste them into ChatGPT, Claude, Gemini or the AI you use, and keep the conversation going.

I read this Mongevity article and want to keep learning with my family. Explain it to us in plain language, suggest safe ideas we can try at home, and tell us if anything should be checked with a doctor. This is not medical advice.

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    "url": "https://mongevity.science/sleep/2026/11/better-sleep-inflammation-genetic-study/",
    "estudio": {
        "tipo": "study",
        "revista": "Sleep",
        "fecha": "2026-10-14",
        "doi": "https://doi.org/10.1093/sleep/zsag254"
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Questions and answers

Is insomnia linked to inflammation?: Yes. People with insomnia had higher CRP, a blood marker of inflammation, and the two share 125 spots in our DNA.
Does poor sleep lead to more inflammation?: The genetic evidence points more strongly from insomnia to higher CRP than from CRP to insomnia.
What is CRP?: CRP is a blood marker of inflammation in the body. Doctors can measure it with a blood test.
What is the first-line treatment for insomnia?: Cognitive behavioral therapy for insomnia. Ask your doctor about it before relying on sleeping pills.