What Your Genes Are Telling You About Your Sleep

By Tracy Southwick

Owner & Founder of Heights of Health

Master MBSR-P, ND, HHP, CNHP, CNA, AMP

Sleep struggles are rarely about willpower. For many of my patients, the real story is written into their genes, in ways that finally explain why the "just relax before bed" advice never worked.

Take MTNR1B, the gene that shapes how your body responds to melatonin. Variations here can affect how strongly your body registers the hormone that tells it "it's time to wind down," and they've also been linked to how your body handles blood sugar overnight. If you've ever felt wide awake at 11pm and groggy come morning, this gene may be part of the story.

Then there's COMT, which controls how quickly you clear stress hormones like dopamine and norepinephrine. Patients with a slower version of this gene tend to hold onto those alert, keyed up chemicals 3-4x longer after a stressful day, making it harder to power down even when the body is exhausted.

MAOA works in a similar neighborhood, breaking down serotonin and other neurotransmitters that regulate mood and the sleep-wake cycle. Lower activity here can mean your brain chemistry stays a little more "on," which shows up as trouble settling or staying asleep.

And CYP1A2, your caffeine gene, plays its own role. Slow metabolizers process caffeine much more gradually, so that 2pm coffee may still be circulating in your system at bedtime, even if you don't feel it.

None of this means your sleep is fixed or fated. What it means is that your genetics can point you toward the right changes, instead of guessing. 

Maybe it's shifting your last cup of coffee earlier in the day. Maybe it's supporting melatonin production differently or building in more deliberate wind-down time to help your body clear stress hormones before bed.

This is exactly the kind of insight we dig into during a genetics consult here at Heights of Health. Once we know how your body is wired, we can build a sleep plan that actually works with your biology instead of against it.

If sleep has been a struggle for you, let's look at what your genes have to say. Have your genetics testing done and book a genetics consult with us so your practitioner can map out a plan built specifically for you. Call our office at 713 861 6777 to set up your at-home genetic test (a cheek swab) and virtual (Zoom) genetic consult.