HoldsUp

Amie Hornaman

Dr. Amie Hornaman is a practitioner focusing on thyroid dysfunction and Hashimoto's disease. Her work addresses thyroid hormone regulation, including T3, T4, and reverse T3, alongside the impacts of stress, viral triggers, and lifestyle factors on thyroid health. She also discusses diagnostic lab testing and treatment approaches for thyroid disorders.

15 claims checked on air: 2 context 2 contradicted 5 overstated 4 supported 2 unverified

What they said on air

0:05:00supportedhighWhat Doctors Don't Tell You About Your Thyroid | Dr. Amie Ho

T4 is an inactive thyroid hormone, whereas T3 is the active thyroid hormone.

"what she gave me is T4. That's the inactive thyroid hormone. There's there's this active thyroid hormone called T3." (said at 0:05:00)

In standard thyroid endocrinology, thyroxine (T4) is classified as a prohormone, whereas triiodothyronine (T3) is the primary biologically active hormone. T4 is secreted by the thyroid gland and converted in peripheral tissues to active T3 via outer-ring deiodination catalyzed by the iodothyronine deiodinase enzymes DIO1 and DIO2. T3 binds to nuclear thyroid hormone receptors with approximately 10- to 15-fold higher affinity than T4 to mediate canonical genomic actions. While emerging research demonstrates that T4 possesses weak intrinsic receptor activity and non-genomic membrane interactions, it primarily serves as a circulating precursor pool for local and systemic generation of active T3.

0:15:48overstatedlowWhat Doctors Don't Tell You About Your Thyroid | Dr. Amie Ho

Low thyroid function is a causative factor in migraines and frozen shoulder.

"then I go into those wild and wacky symptoms that you wouldn't necessarily pair up with thyroid like migraines and frozen shoulder that absolutely can be attributed to low thyroid function." (said at 0:15:48)

While observational studies show a significant statistical association and comorbidity between hypothyroidism and migraine (e.g., in a large multinational cohort of over 33 million patients), the relationship is largely correlational and bidirectional rather than a definitive direct cause. Furthermore, evidence linking hypothyroidism directly to frozen shoulder (adhesive capsulitis) is mixed and unproven; a 2025 systematic review and meta-analysis of metabolic and hormonal factors found no significant association between frozen shoulder and thyroid function (SMD 0.067, 95% CI -0.024 to 0.158). Claiming that migraines and frozen shoulder can 'absolutely be attributed to low thyroid function' overstates correlational and conflicting observational findings as established causal relationships.

0:29:06overstatedlowWhat Doctors Don't Tell You About Your Thyroid | Dr. Amie Ho

Impaired thyroid function reduces immune system function and diminishes the body's ability to surveillance and destroy cancer cells.

"So, we know that if your thyroid isn't functioning well, then your immune system isn't even functioning at a top level. So, why did we see, you know, so many people being taken out by COVID when, you know, it's just a virus. It's just a—man-made, but you know, that's a whole other discussion. But, you know what? If your thyroid isn't functioning well, even your ability to surveillance cancer cells, like your body's ability to seek out and destroy the cancer cells that we all have in our body" (said at 0:29:06)

While thyroid hormones do play a role in modulating cellular metabolism, leukocyte function, and adaptive immune responses (including T cell differentiation), the relationship between thyroid status and immune function is complex, bidirectional, and context-dependent rather than a simple on-off switch. Furthermore, asserting that impaired thyroid function impairs cancer immune surveillance across the board is an oversimplification not supported by clinical oncology data; in multiple malignancies, hypothyroidism is actually associated with slower tumor growth or improved responses to immune checkpoint inhibitor therapy, whereas thyroid hormones can sometimes stimulate tumor proliferation and angiogenesis.

0:29:35needs contextmoderateWhat Doctors Don't Tell You About Your Thyroid | Dr. Amie Ho

Every person has cancer cells continuously present in their body that the immune system constantly destroys.

"the cancer cells that we all have in our body, FYI, we all have them, but your immune system is constantly destroying them." (said at 0:29:35)

The claim states that every person has cancer cells continuously present in their body that are constantly destroyed by the immune system. In immunology and oncology, the framework of cancer immunoediting recognizes an "elimination phase" (or immunosurveillance), in which the immune system detects and destroys nascent transformed cells. Furthermore, genomic sequencing shows that healthy individuals accumulate somatic mutations and clonal expansions in normal tissues throughout life. However, phrasing this as "we all have cancer cells" is a slight oversimplification; histologically normal tissues accumulate driver mutations and altered cells, but possessing mutated or aberrant precursor cells is not clinically or pathologically synonymous with having malignant cancer. The core physiological mechanism of immune elimination (immunosurveillance) acting against newly transformed or aberrant cells is well supported.

0:30:07unverifiedvery lowWhat Doctors Don't Tell You About Your Thyroid | Dr. Amie Ho

Elevated reverse T3 and non-optimized thyroid function impair the immune system's ability to destroy cancer cells.

"It's the fact that these poor people on T4 only with elevated reverse T3 and nonoptimized thyroids don't have the immune system working enough to destroy cancer cells." (said at 0:30:07)

No published record matching the claim that T4-only therapy, elevated reverse T3, or non-optimized thyroid status impairs the immune system's ability to destroy cancer cells was located; this does not prove the claim false. While T3 (liothyronine) has been investigated experimentally as a potential small-molecule blocker of the TIGIT/PVR immune checkpoint (PMID: 32894141), there is no established clinical or mechanistic evidence establishing that elevated reverse T3 in patients on T4 monotherapy causes immunosuppression that prevents immune clearance of cancer cells.

0:32:13overstatedlowWhat Doctors Don't Tell You About Your Thyroid | Dr. Amie Ho

Functional psychiatry uses T3 to treat conditions like manic depression and schizophrenia due to T3 receptor sites in the brain.

"Functional psychiatry will use T3 even for extreme cases, like manic-depressive and schizophrenia, they will use T3 because of the T3 receptor sites on the brain." (said at 0:32:13)

Triiodothyronine (T3 or liothyronine) augmentation has been studied and used in psychiatry for treatment-resistant affective disorders, including bipolar depression (historically referred to as manic depression), due to the role of thyroid hormones and thyroid hormone receptors in central nervous system neurotransmission and mood regulation. However, systematic reviews note that evidence for T3 in bipolar disorder remains limited, mixed, and based largely on small or open-label studies. Furthermore, there is no established clinical evidence or guideline support for using T3 to treat schizophrenia.

0:33:40overstatedlowWhat Doctors Don't Tell You About Your Thyroid | Dr. Amie Ho

Epstein-Barr virus is a major precursor to Hashimoto's thyroiditis.

"EBV is a huge precursor to Hashimoto's." (said at 0:33:40)

While Epstein-Barr virus (EBV) has been investigated as a potential environmental trigger or cofactor in Hashimoto's thyroiditis and other autoimmune thyroid diseases, describing it as a "huge precursor" significantly overstates the scientific evidence. Observational studies report variable detection rates of EBV in thyroid tissue and blood of Hashimoto's patients, but findings are inconsistent, and controlled studies show no clear causal link or significant difference in viral presence compared to controls. Current consensus views EBV as one of several hypothetical environmental triggers in genetically predisposed individuals, rather than an established major precursor.

0:34:10contradictedhighWhat Doctors Don't Tell You About Your Thyroid | Dr. Amie Ho

Eighty to ninety percent of the population has Hashimoto's thyroiditis.

"I think it's safe to say like 80 to 90% of the population has Hashi." (said at 0:34:10)

The speaker's claim that 80% to 90% of the population has Hashimoto's thyroiditis is contradicted by epidemiological evidence. A comprehensive global systematic review and meta-analysis of 48 studies covering over 22 million participants found that the overall adult prevalence of Hashimoto's thyroiditis is approximately 7.5% (95% CI: 5.7% to 9.6%), with regional estimates ranging from 5.8% to 14.2%. Even when considering thyroid autoantibody seroprevalence in general populations, figures remain far below the claimed 80% to 90%.

0:36:46supportedmoderateWhat Doctors Don't Tell You About Your Thyroid | Dr. Amie Ho

Hashimoto's thyroiditis causes the thyroid gland to appear jagged and smaller on ultrasound imaging.

"Like we can see it on ultrasound. It starts looking like Pac-Man attacked it, like jagged. It gets smaller." (said at 0:36:46)

Ultrasonographic imaging of Hashimoto's thyroiditis (chronic lymphocytic thyroiditis) characteristically demonstrates diffuse parenchymal heterogeneity, hypoechogenicity, and micronodularity/pseudonodularity separated by fibrous bands, which gives the thyroid gland an irregular, lobulated, or 'moth-eaten' appearance. Additionally, progressive autoimmune destruction of follicles and advancing fibrosis often lead to thyroid atrophy (volume reduction/shrinkage) in long-standing disease.

0:40:00supportedmoderateWhat Doctors Don't Tell You About Your Thyroid | Dr. Amie Ho

Patients can have autoimmune Hashimoto's thyroiditis with seronegative antibody test results.

"There are conditions—it's called seronegative antibodies—that we'll see a zero, but we know that that person has autoimmunity." (said at 0:40:00)

Published clinical and histopathological studies confirm that autoimmune thyroiditis (Hashimoto's thyroiditis) can occur in the absence of detectable circulating thyroid autoantibodies (anti-thyroperoxidase and anti-thyroglobulin antibodies), a condition recognized in the medical literature as seronegative autoimmune thyroiditis. In these patients, characteristic autoimmune lymphocytic infiltration of the thyroid gland and localized intrathyroidal autoantibody production can be present despite negative peripheral blood antibody assays.

0:40:22overstatedlowWhat Doctors Don't Tell You About Your Thyroid | Dr. Amie Ho

Eating gluten triggers molecular mimicry and antibody attacks against the thyroid gland in individuals with Hashimoto's thyroiditis.

"like you said, molecular mimicry, whenever you eat gluten, that's kicking up a thyroid storm. It's kicking up your antibodies basically to attack your thyroid." (said at 0:40:22)

The claim that eating gluten directly triggers acute antibody attacks or a "thyroid storm" via molecular mimicry in patients with Hashimoto's thyroiditis is overstated. While molecular mimicry (such as cross-reactivity involving transglutaminase enzymes) is a hypothesized theoretical link between celiac disease and autoimmune thyroiditis, published clinical studies do not demonstrate that gluten ingestion triggers acute antithyroid antibody surges or thyroid destruction in Hashimoto's patients who do not have celiac disease. Reviews of the scientific literature conclude that evidence is insufficient to recommend a gluten-free diet to non-celiac patients with Hashimoto's thyroiditis. Furthermore, a "thyroid storm" is a specific, life-threatening medical emergency involving severe hyperthyroidism, not a reaction triggered by gluten in Hashimoto's thyroiditis.

0:44:20supportedhighWhat Doctors Don't Tell You About Your Thyroid | Dr. Amie Ho

Nature-Throid is composed of 80% T4 and 20% T3.

"Dr. Tyna said when she was on Nature-Throid, that's 80% T4 and 20% T3." (said at 0:44:20)

Desiccated thyroid extract (DTE) formulations like Nature-Throid and Armour Thyroid adhere to USP specifications standardized to approximately 38 mcg of levothyroxine (T4) and 9 mcg of liothyronine (T3) per grain (65 mg). This corresponds to a T4:T3 weight ratio of approximately 4.22:1, which equates to roughly 81% T4 and 19% T3 (commonly referred to as an 80/20 ratio).

0:47:18contradictedlowWhat Doctors Don't Tell You About Your Thyroid | Dr. Amie Ho

Hypothyroidism or low thyroid function impairs the effectiveness of GLP-1 receptor agonist medications.

"Thyroid's low and slow, GLP-1 won't work. People are wasting money." (said at 0:47:18)

Clinical evidence directly contradicts the claim that hypothyroidism prevents GLP-1 receptor agonists from working. In a retrospective case-control study evaluating weight loss with the GLP-1 receptor agonist liraglutide, individuals with hypothyroidism on stable levothyroxine therapy achieved significant and comparable weight loss relative to matched controls without thyroid disease (-10.8% vs. -8.9%, P = 0.940), with similar proportions reaching ≥5% total body weight loss (79.2% vs. 71.0%, P = 0.248). Baseline TSH levels within the normal reference range did not predict or limit weight loss outcomes.

0:51:20unverifiedvery lowWhat Doctors Don't Tell You About Your Thyroid | Dr. Amie Ho

Elevated insulin, elevated cortisol, liver dysfunction, gut dysbiosis, and micronutrient deficiencies drive increased conversion of T4 into reverse T3.

"Well, what are the drivers of reverse T3? Elevated insulin from eating like garbage, elevated cortisol—you're all stressed out and wigged out or you just have environmental stressors that are throwing off your adrenals—your liver, your gut, huge, huge places of conversion. So, how many livers are gunked up? How many guts are messed up? Micronutrient deficiencies. There's so many things that get in the way of that T4 to T3 conversion" (said at 0:51:20)

No published record matching the claim that elevated insulin, elevated cortisol, liver dysfunction, gut dysbiosis, and micronutrient deficiencies drive increased conversion of T4 into reverse T3 was located; this does not prove the claim false.

1:03:56needs contextmoderateWhat Doctors Don't Tell You About Your Thyroid | Dr. Amie Ho

Hypothyroidism causes myxedema, characterized by visible thickening and swelling of the face, neck, skin, and back of the arms rather than just adipose tissue.

"The myxedema, the swollen face, the moon face, the thickening. Like if you're looking at yourself and your your face, like it's not just fat. It's literally like a thickening of the the face, of the neck, of the skin, back of arms. It's it's thicker." (said at 1:03:56)

Generalized myxedema is a hallmark cutaneous manifestation of severe hypothyroidism caused by the accumulation of hydrophilic glycosaminoglycans (notably hyaluronic acid) in the dermis and subcutaneous tissues, which produces non-pitting edema, facial/periorbital puffiness, and skin thickening rather than simple adipose tissue expansion. However, the specific clinical term 'moon face' (moon facies) is classically a feature of Cushing's syndrome (hypercortisolemia) rather than hypothyroidism.

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