How does my DNA influence thyroid stimulating hormone (TSH) levels?

The DIO2 thyroid-conversion enzyme that turns inactive T4 into active T3. The COMT and CYP1A1 enzymes that move estrogen through Phase I detox. The SHBG variants that bind or release testosterone. The CYP17A1 and HSD3B2 nodes in the steroid synthesis cascade. Your "normal" labs may sit on top of a genome that needs a different intervention.

What kind of test do I need to see my Thyroid Stimulating Hormone (TSH) Levels result?

Whole-genome sequencing at 30× clinical depth. Consumer SNP-chip tests like 23andMe or AncestryDNA only read ~0.02% of your DNA and miss most of the variants this analysis needs. Mosaic reads all 3 billion base pairs and produces the full report, all 108 insights.

How is Thyroid Stimulating Hormone (TSH) Levels different from clinical lab testing?

Clinical labs measure downstream biomarkers (blood levels, hormone values, metabolic byproducts) at a single point in time. Genomic insights like Thyroid Stimulating Hormone (TSH) Levels reveal the underlying variant that shapes the biology, which is constant for life. The two are complementary: labs show the current snapshot; genomics shows the long-term tendency and where lifestyle leverage is highest.

Thyroid Stimulating Hormone (TSH) Levels

One of 108 insights in your Genomic Lifestyle Optimization Report.

Your individual optimal TSH is often narrower than the lab reference range. Someone who feels best at 1.0 will feel terrible at 3.5, even though both are "normal." Knowing your sweet spot ends years of being told "you're fine" when you're clearly not.

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How your DNA shapes thyroid stimulating hormone (TSH) levels.

TSH levels depend on the feedback loop between brain (hypothalamus, pituitary) and thyroid. TSHR (the TSH receptor on the thyroid), PDE8B (which regulates the cAMP signaling downstream of TSH), and TPO (thyroid peroxidase, which makes thyroid hormone) all shape baseline TSH set-point. Different people's "normal" TSH genuinely sits at different values.

Carriers of common PDE8B variants are associated with higher baseline TSH at any given level of thyroid hormone production, which can make their "normal" TSH look high even when free T4 and T3 are adequate. Carriers of TSHR variants are associated with altered TSH-thyroid signaling. The variants explain why some carriers feel best at TSH 1.0 and others at TSH 2.5.

Iodine is the essential substrate. Selenium supports TPO function. Adequate iron, zinc, and vitamin D all influence thyroid hormone production. Severe caloric restriction, chronic stress, and certain medications (lithium, amiodarone) all alter TSH. Bedtime estrogen exposure (in hormone replacement) raises TSH transiently.

A TSH of 3.5 isn't the same number across clients. Which PDE8B/TSHR/TPO variant pattern you carry decides whether your "in range" TSH actually feels good or whether a slightly lower or higher number is the better personal target, a conversation worth having with a thyroid-aware clinician.

In your report, Thyroid Stimulating Hormone (TSH) Levels is one dark card: a color marker set by your variants, the mechanism in plain language, and one practical next step.

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Thyroid: the 4-insight cluster.

Thyroid Stimulating Hormone (TSH) Levels is one finding in a tightly related cluster. Mosaic reads the other 3 alongside it, so you see the whole biology, not an isolated data point.

About Thyroid Stimulating Hormone (TSH) Levels.

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This is one of 108. Your report reads all of them, from one cheek swab.

See the real pages first. Then order your kit and the full Lifestyle Report lands in 15 to 20 days.

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