Low Thyroid · Hypothyroidism · Hashimoto’s
Low thyroid — beyond the TSH test.
If your TSH is “normal” but you still feel cold, tired, and stuck, the standard one-marker screen has missed the picture. A full thyroid evaluation looks at nine markers, not one.
Open to the public · No referral required · Functional medicine evaluation
Why a normal TSH isn’t enough
The thyroid story has nine markers, not one.
THE GAP
TSH can be normal while T3 is low.
TSH is a pituitary hormone, not a thyroid hormone. It can sit mid-range while the actual active hormone (free T3) is suppressed and conversion is broken.
THE AUTOIMMUNE PIECE
Hashimoto’s is the most common driver.
Hashimoto’s is the most common cause of U.S. hypothyroidism — yet it’s missed by TSH-only screens. Confirming it requires TPO and Tg antibody testing.
THE CONVERSION ISSUE
Reverse T3 sabotages the active hormone.
Stress, inflammation, and chronic dieting elevate reverse T3 — a structurally similar molecule that blocks T3 receptors and produces hypothyroid symptoms even when total levels look OK.
If you’ve been told your thyroid is “fine” but you still have symptoms, you may not have been tested fully. The full panel changes the answer surprisingly often.
The complete thyroid panel
What we actually measure.
A real thyroid evaluation measures the upstream signal, both thyroid hormones, the active vs. inhibitory conversion, the autoimmune flag, and the nutrient cofactors required for the system to work. Nine markers.
UPSTREAM
TSH
Thyroid stimulating hormone. The pituitary’s signal to the thyroid — not the active hormone itself.
STORAGE
Free T4
The thyroid’s main output. Largely inactive — must be converted to T3 to do anything in cells.
ACTIVE
Free T3
The active hormone that actually drives metabolism in every cell. Often suppressed even when T4 looks normal.
CONVERSION
Reverse T3
The inhibitory mirror of T3. Elevated by stress, inflammation, low calories, and illness — blocks active T3.
RATIO
Free T3 : Reverse T3
The key conversion-quality marker. Often the clearest signal that the thyroid is “normal” on paper but not working in cells.
TRANSPORT
Total T3 & Total T4
Catches binding protein issues, low TBG, and other transport-level distortions that change what tissues actually see.
AUTOIMMUNE
TPO Antibodies
Thyroid peroxidase antibodies. Elevated TPO is the most specific marker for Hashimoto’s thyroiditis.
AUTOIMMUNE
Tg Antibodies
Thyroglobulin antibodies. Confirms autoimmunity when present without elevated TPO; also tracks autoimmune burden over time.
COFACTORS
Iron, Ferritin, Vit D, B12
Without adequate cofactors, the thyroid cannot make, transport, or activate its own hormones — even with replacement therapy.
A standard physical-with-bloodwork typically measures one of these nine: TSH. The Metabolic Blueprint measures all of them.
The cascade view
How low thyroid actually develops.
Most people with hypothyroid symptoms don’t have a single problem — they have an autoimmune driver, a conversion problem, and a downstream symptom set, all at once.
Hashimoto’s autoimmunity
Immune system attacks thyroid tissue, gradually reducing output.
Gut + nutrient deficits
Iron, selenium, zinc, iodine, vitamin D — required to make and activate thyroid hormone.
Chronic stress + HPA
Elevated cortisol suppresses TSH and shifts T4 toward reverse T3.
Inflammation + toxins
Inflammatory cytokines and endocrine-disrupting compounds block conversion at the cellular level.
Suppressed free T3
Active hormone drops below optimal range; cellular metabolism slows.
Elevated reverse T3
Inhibitory molecule rises, occupies T3 receptors, blocks the active hormone.
Lowered RMR
Basal metabolic rate drops below predicted — measurable on Breezing Med RMR test.
Fatigue + brain fog
Cold hands + feet
Hair thinning + dry skin
Weight gain + slow loss
Constipation
Low mood + flat affect
Joint stiffness
Menstrual changes
A patient on thyroid medication can still feel every symptom on this list. Medication alone doesn’t fix conversion problems, autoimmune drivers, or missing cofactors. The Blueprint identifies which of these are loudest in your case.
How we treat it
Sequenced, not stacked.
A real thyroid protocol works in order: identify the driver, fix the inputs, then address the hormone gap. Trying to skip the first two and just adjust dose is why so many patients with “treated” hypothyroidism still feel poorly.
Phase 1 — root drivers. Address gut dysfunction, replenish required nutrient cofactors (iron, selenium, zinc, iodine where appropriate, vitamin D), lower inflammatory load, and quiet HPA axis stress. This alone restores conversion in a meaningful percentage of cases.
Phase 2 — the autoimmune layer. For Hashimoto’s, identify and remove the autoimmune triggers (gluten and other food sensitivities, gut permeability, environmental compounds). Antibody levels drop, conversion improves, symptoms recede.
Phase 3 — replacement, if still needed. Where Phases 1 and 2 haven’t closed the gap, work with a prescribing provider to ensure replacement is dosed against free T3 + reverse T3, not just TSH. Many patients need less medication after the upstream work is done.
A note on prescribing. Twin Cities Metabolism evaluates and recommends. We work alongside your prescribing physician on medication adjustments — we do not prescribe thyroid replacement directly.
Where to go from here
Two ways to get the full thyroid picture.
METABOLIC SNAPSHOT
Comprehensive Assessment
$195 · ~45 min · 3-page report
InBody Scan + RMR Test + clinical interpretation. Catches the metabolic footprint of low thyroid (suppressed RMR, body comp shifts) before committing to the full lab workup.
THE 9-MARKER PANEL
Metabolic Blueprint
~$1,250 · full lab workup · written report
Full thyroid panel (all 9 markers), gut function, hormone metabolites, full chemistry. Identifies the cascade driver and produces a sequenced phase-1-2-3 protocol.
Not sure where to start? A free 30-minute consultation helps us figure that out together.
Open to the public. No referral required. HSA/FSA eligible. Telehealth nationwide. HSA/FSA typically accepted for clinical components. Located at 1700 Hwy 36 W, Suite 400, Roseville, MN 55113 · (651) 636-0055.
Medical disclaimer. The content on this page is for educational purposes only and does not constitute medical advice, diagnosis, or treatment. Twin Cities Metabolism delivers functional medicine evaluation and clinical protocols; results vary by individual and depend on adherence and underlying physiology. Always consult a licensed clinician about your specific situation. Reviewed by Dr. Jared Larsen, LN, CNS, DC, MS. Last reviewed: May 2026.
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