Natural treatment of hypothyroidism can support your thyroid and how you feel, but it can't replace thyroid hormone when your gland no longer makes enough. Selenium, stress care and, for some people, a gluten-free diet have the best evidence, and it's modest.
So what does "healing" your thyroid mean? Split it in two: healing the gland, and helping the person who lives with it.
The first is sometimes possible. The second almost always is. Most advice online blurs the two.
Can you heal your thyroid naturally?
You usually can't reverse the damage Hashimoto's does to the thyroid, but some types of hypothyroidism resolve on their own.
Hypothyroidism means your thyroid doesn't make enough of the hormone that helps set your energy, metabolism and body temperature. Nearly 5 in 100 Americans ages 12 and older have it, and Hashimoto's disease, an autoimmune disorder, is the most common cause, per the NIDDK.
Can hypothyroidism go away? It depends on the cause
| Cause | Can it resolve? | What usually happens |
| Hashimoto's with overt hypothyroidism | Usually not | Daily thyroid hormone, most often for life |
| Subclinical hypothyroidism | Often | Repeat labs; treatment depends on TSH, symptoms and pregnancy plans |
| Thyroiditis after pregnancy or a virus | Often, not always | Labs tracked over months |
| Whole thyroid removed by surgery | No | Thyroid hormone for life, per MedlinePlus |
"Most people take thyroid medicine for life. But if your thyroid problem came from a virus or happened after pregnancy, it may go away." - Source: American Thyroid Association
What about subclinical hypothyroidism?
Subclinical hypothyroidism means TSH is high but free T4, the main thyroid hormone, is normal. It often drifts back without treatment.
"37% of 107 adults over 55 with subclinical hypothyroidism saw TSH return to normal without treatment over about two and a half years. About 27% progressed to overt hypothyroidism." - Source: Díez and Iglesias, Journal of Clinical Endocrinology & Metabolism, 2004
Treating the number doesn't always help the person, either. In the TRUST trial of 737 adults 65 and older with subclinical hypothyroidism, levothyroxine lowered TSH but didn't improve symptoms or tiredness after a year compared with placebo.
The gland and the person don't always move together. (TRUST enrolled older adults, and pregnancy is handled differently.)
What are the signs of an underactive thyroid?
Early signs include fatigue, feeling cold, constipation, weight gain, dry skin, thin or brittle hair and nails, low mood, and heavier or irregular periods, according to MedlinePlus.
Men get these symptoms too. Women are five to eight times more likely to have thyroid problems, and up to 60% of people with thyroid disease don't know it, per the American Thyroid Association (ATA).
Symptoms overlap with stress, perimenopause and low iron, so labs settle it. Our guide to thyroid test values explains each marker, and hypothyroidism vs. hyperthyroidism covers the overactive side.
Where does thyroid medication fit in?
Levothyroxine, a pill identical to the T4 hormone a healthy thyroid makes, is the standard treatment for hypothyroidism, and nothing natural substitutes for it when your gland can't keep up.
Some foods and supplements change how well your body absorbs it, the NIDDK notes. The ATA asks you to call your doctor before starting or stopping antacids, calcium or iron supplements, biotin or estrogen. It also says to stop thyroid medicine only with your doctor's help.
Biotin can cause incorrect lab results, too, the FDA warns, so mention it before blood work.
We'd rather see you on the right dose and feeling like yourself than pushing through symptoms to avoid a pill. Habits work on top of that.
Fatigue on a stable dose deserves its own workup, and our guide to chronic fatigue covers other causes.
Which natural treatments for hypothyroidism have evidence?
Selenium has the most consistent evidence, mostly for antibody numbers. The rest is early, mixed or risky for people with thyroid disease.
Natural treatments for hypothyroidism and Hashimoto's: how strong the evidence is
| Approach | What studies show | Evidence | Watch for |
| Selenium | Lowers TPO antibodies; small TSH drop if not on thyroid hormone | Moderate | Upper limit; not advised in pregnancy with antibodies |
| Gluten-free | Needed with celiac; small, mixed studies without it | Low without celiac | Ask about celiac screening first |
| Stress care | One small trial: better mood, no clear TSH change | Early | Low risk |
| Probiotics | 8 trials: no change in thyroid hormones | Not supported | Little reason to buy one for your thyroid |
| Ashwagandha | One pilot in 50 adults with mildly high TSH | Early | NCCIH advises against it with thyroid disease |
| Iodine or kelp | Helps only if you're deficient | Not advised | Can worsen hypothyroidism in Hashimoto's |
Does selenium help Hashimoto's?
Selenium is a mineral your thyroid uses to make and convert its hormones, and in Hashimoto's it can lower TPO antibodies, a marker of the immune attack on the gland.
A 2024 meta-analysis of 35 trials found selenium lowered TPO antibodies, and slightly lowered TSH in people not taking thyroid hormone, with moderate certainty. Free T4 and T3 didn't change.
Other trials found no effect on thyroid function or quality of life, the NIH Office of Dietary Supplements notes, and too much selenium is linked to hair loss.
So selenium moves a lab number. Whether you feel different is a separate question. Our guide to thyroid vitamins and supplements goes deeper.
Should you take iodine or kelp for your thyroid?
Most people with hypothyroidism shouldn't add iodine supplements or kelp unless a clinician confirms a deficiency.
Your thyroid needs iodine to make hormone. With Hashimoto's, though, large amounts from kelp and other seaweed, or from supplements, may cause hypothyroidism or make it worse, the NIDDK warns. Excess iodine can cause goiter and high TSH, the same problems as too little, per the ODS.
Does going gluten-free help your thyroid?
A gluten-free diet is necessary if you have celiac disease, which is more common in people with autoimmune thyroid disease. Without celiac, the evidence is thin.
In that group, a 2023 meta-analysis pooled just 4 studies and 87 patients. TSH dipped slightly, antibody changes weren't statistically clear, and the authors called the evidence too thin to recommend gluten-free eating to everyone with Hashimoto's. A 2025 review of 3 trials rated the evidence very uncertain.
If you want to try it, ask about celiac testing first. Our Hashimoto's diet guide walks through elimination diets, and our list of foods that support thyroid health covers what to eat more of.
What about ashwagandha and other herbs?
Ashwagandha has one small trial in subclinical hypothyroidism, and NIH experts advise against it for people with thyroid disorders.
In an 8-week pilot of 50 adults with mildly high TSH, ashwagandha improved TSH, T3 and T4 versus placebo. But the NCCIH says it "is not recommended" for people with autoimmune or thyroid disorders, may interact with thyroid hormone medicines, and has been linked to rare liver injury.
Supplements don't need government approval before they're sold, the ATA points out, so we'd rather you check before adding anything.
Can gut health affect your thyroid?
Celiac disease is the clearest gut and thyroid link, but probiotics haven't been shown to change thyroid hormone levels.
A 2024 meta-analysis of 8 trials found probiotics or prebiotics didn't change TSH, free T4 or free T3. Our guide to gut health and autoimmune disease covers the wider picture.
Does stress affect your thyroid?
Managing stress may help how you feel with Hashimoto's, but evidence that it changes thyroid labs is limited.
In a randomized trial of 60 women with Hashimoto's, eight weekly stress management sessions lowered stress, anxiety and depression scores and produced a favorable change in thyroglobulin antibodies. TPO antibodies and TSH trended down, but not significantly.
That's the person improving while the gland barely budges, and it counts. See ways to lower cortisol naturally, and if symptoms come and go, our guide to managing Hashimoto's flare-ups.
Whatever you try, change one thing at a time and recheck. Six changes at once leave you guessing which one helped.
When should you see a doctor about your thyroid?
See a clinician for ongoing fatigue, feeling cold, or changes in weight or your cycle, especially if thyroid disease runs in your family. If you're already treated, MedlinePlus advises calling when symptoms worsen, don't improve, or new ones appear.
How Parsley clinicians approach thyroid health
Parsley clinicians are board-certified in conventional medicine with advanced training in functional medicine, so they can prescribe and adjust thyroid hormone and also look for what's behind symptoms that linger.
That often means TSH, free T4, free T3 and thyroid antibodies, plus ferritin, B12 and vitamin D, celiac screening when it fits, and a supplement review. Our guide to advanced lab testing explains the wider panel, and Hashimoto's can come with other autoimmune conditions.
You don't need a perfect gland to feel well.
Frequently asked questions
How do I get my thyroid back to normal?
It depends on the cause. Temporary thyroiditis and many subclinical cases settle on their own, while hypothyroidism from Hashimoto's usually needs thyroid hormone. With the right dose, the ATA says, you can live a normal, healthy life.
Can you lower TSH naturally?
TSH rises when your thyroid falls behind, so thyroid hormone is the most reliable way to lower it. Selenium lowered TSH slightly in people with Hashimoto's not on medication, and mildly high TSH sometimes normalizes on its own.
Does a thyroid cleanse work?
We haven't seen research showing a cleanse helps the thyroid. The ATA cautions that supplements and cleanses "can act like drugs in your body." Check labels for iodine or kelp, which can backfire with Hashimoto's.
Can I stop taking thyroid medication if my levels are normal?
Normal levels on medication usually mean the dose is working. Too little hormone can bring back tiredness, feeling cold and constipation, so change or stop it only with your prescriber.
References & Sources:
- National Institute of Diabetes and Digestive and Kidney Diseases. Hypothyroidism (underactive thyroid). Reviewed March 2021. Accessed November 6, 2026. https://www.niddk.nih.gov/health-information/endocrine-diseases/hypothyroidism
- Thyroid gland removal. MedlinePlus Medical Encyclopedia. National Library of Medicine. Accessed November 6, 2026. https://medlineplus.gov/ency/article/002933.htm
- American Thyroid Association. Hypothyroidism. Accessed November 6, 2026. https://www.thyroid.org/hypothyroidism/
- Díez JJ, Iglesias P. Spontaneous subclinical hypothyroidism in patients older than 55 years: an analysis of natural course and risk factors for the development of overt thyroid failure. J Clin Endocrinol Metab. 2004;89(10):4890-4897. doi:10.1210/jc.2003-032061
- Stott DJ, Rodondi N, Kearney PM, et al. Thyroid hormone therapy for older adults with subclinical hypothyroidism. N Engl J Med. 2017;376(26):2534-2544. doi:10.1056/NEJMoa1603825
- Hypothyroidism. MedlinePlus Medical Encyclopedia. National Library of Medicine. Accessed November 6, 2026. https://medlineplus.gov/ency/article/000353.htm
- American Thyroid Association. General information/press room. Accessed November 6, 2026. https://www.thyroid.org/media-main/press-room/
- National Institute of Diabetes and Digestive and Kidney Diseases. Hashimoto's disease. Reviewed June 2021. Accessed November 6, 2026. https://www.niddk.nih.gov/health-information/endocrine-diseases/hashimotos-disease
- US Food and Drug Administration. Biotin interference with troponin lab tests: assays subject to biotin interference. Accessed November 6, 2026. https://www.fda.gov/medical-devices/in-vitro-diagnostics/biotin-interference-troponin-lab-tests-assays-subject-biotin-interference
- Huwiler VV, Maissen-Abgottspon S, Stanga Z, et al. Selenium supplementation in patients with Hashimoto thyroiditis: a systematic review and meta-analysis of randomized clinical trials. Thyroid. 2024;34(3):295-313. doi:10.1089/thy.2023.0556
- Office of Dietary Supplements. Selenium: fact sheet for health professionals. National Institutes of Health. Accessed November 6, 2026. https://ods.od.nih.gov/factsheets/Selenium-HealthProfessional/
- Office of Dietary Supplements. Iodine: fact sheet for health professionals. National Institutes of Health. Accessed November 6, 2026. https://ods.od.nih.gov/factsheets/Iodine-HealthProfessional/
- Roy A, Laszkowska M, Sundström J, et al. Prevalence of celiac disease in patients with autoimmune thyroid disease: a meta-analysis. Thyroid. 2016;26(7):880-890. doi:10.1089/thy.2016.0108
- Piticchio T, Frasca F, Malandrino P, et al. Effect of gluten-free diet on autoimmune thyroiditis progression in patients with no symptoms or histology of celiac disease: a meta-analysis. Front Endocrinol (Lausanne). 2023;14:1200372. doi:10.3389/fendo.2023.1200372
- Araújo EMQ, Coutinho-Lima CRO, de Sousa AS, et al. Effects of gluten-free diet in non-celiac Hashimoto's thyroiditis: a systematic review and meta-analysis. Nutrients. 2025;17(21):3437. doi:10.3390/nu17213437
- Sharma AK, Basu I, Singh S. Efficacy and safety of ashwagandha root extract in subclinical hypothyroid patients: a double-blind, randomized placebo-controlled trial. J Altern Complement Med. 2018;24(3):243-248. doi:10.1089/acm.2017.0183
- National Center for Complementary and Integrative Health. Ashwagandha: usefulness and safety. Accessed November 6, 2026. https://www.nccih.nih.gov/health/ashwagandha
- American Thyroid Association. Complementary and alternative medicine in thyroid disease (CAM). Accessed November 6, 2026. https://www.thyroid.org/thyroid-disease-cam/
- Shu Q, Kang C, Li J, et al. Effect of probiotics or prebiotics on thyroid function: a meta-analysis of eight randomized controlled trials. PLoS One. 2024;19(1):e0296733. doi:10.1371/journal.pone.0296733
- Markomanolaki ZS, Tigani X, Siamatras T, et al. Stress management in women with Hashimoto's thyroiditis: a randomized controlled trial. J Mol Biochem. 2019;8(1):3-12. https://europepmc.org/article/MED/31404454
This article is educational and isn't a substitute for medical advice. Everyone's thyroid is different, so talk with your clinician before changing your medication, diet or supplements.
