Thyroid health is all about how well your thyroid gland keeps your body’s metabolism running — from energy to temperature and growth. The thyroid is a small butterfly-shaped gland in your neck that produces hormones critical for many body functions.
The thyroid gland plays a central role in metabolism and overall wellness. When thyroid hormone levels are out of balance, symptoms can range from fatigue and weight changes to mood shifts and heart problems. An underactive thyroid (hypothyroidism) or an overactive thyroid (hyperthyroidism) can disrupt hormone balance, affecting energy, mood, weight, and long-term health.
Monitoring thyroid health is especially important since imbalances often go undiagnosed and can be easily mistaken for stress or aging. Testing when symptoms or risk factors are present can help identify issues early, supporting timely evaluation and treatment by a healthcare provider.
Lab testing through Hims is built around key biomarkers that reflect how your body is performing across major health systems. Each test focuses on high-impact indicators chosen to give you the clearest picture of your well-being and where to take action next. Instead of testing everything, Hims zeroes in on the markers that matter most for guiding long-term health improvements.
Thyroid health testing measures hormones and antibodies that show how well your thyroid gland is functioning and whether autoimmune activity may be affecting it.
Thyroglobulin Antibodies (TgAb) Advanced plan
Thyroglobulin antibodies (TgAb) are immune system proteins that sometimes attack thyroglobulin, the material your thyroid needs to create hormones. Low levels mean your immune system is not interfering with your thyroid's ability to produce hormones.
Thyroid Peroxidase Antibodies (TPOAb) Advanced plan
Thyroid peroxidase antibodies (TPOAb) sometimes attack thyroid peroxidase, an enzyme needed to produce thyroid hormones. Healthy, low levels mean your thyroid is free to make hormones without interference.
Free Triiodothyronine (T3) Advanced plan
Free triiodothyronine (T3) is the active thyroid hormone that fuels metabolism, energy, and mood. When in a healthy range, steady levels show your body has the active thyroid hormone it needs to keep your cells energized and support your daily life.
Thyroid-Stimulating Hormone (TSH)
Thyroid-stimulating hormone (TSH) is the brain’s messenger to your thyroid that communicates the amount of thyroid hormone to make. It also drives metabolism, energy, and mood. A balanced level shows that your brain and thyroid are working together to keep your energy, metabolism, and mood steady.
Free Thyroxine (T4)
Free thyroxine (T4) is the main hormone made by your thyroid gland. While T4 itself has some effects in the body, its main job is to act as a "prohormone", a substance that your body converts into the active form, T3. Healthy levels mean your thyroid is making enough of the inactive hormone that your body can convert into active T3 when needed.
With lab testing through Hims, you get clear results that span multiple areas of health — connecting the dots between your cardiovascular system, metabolism, hormones, liver, kidneys, nutrients, inflammation, immune function, blood health, stress, and even biological age. The results are explained clearly and simply, so you can easily understand what’s happening inside your body.
Beyond the numbers, Hims provides actionable insights into where you need to focus to improve your health. Each result comes with insights to help you make sense of your biomarkers and identify practical steps to support better outcomes.
If your results suggest areas for improvement, you’ll receive an action plan designed by experts that includes lifestyle guidance and, when deemed appropriate by a healthcare provider, prescription medication to help you reach your goals.
More than 2.4 million people trust Hims & Hers for accessible, science-backed care — from lab testing to ongoing health management.1
Who should get tested for thyroid health and when?
Thyroid testing may be helpful if you experience symptoms such as:
• Fatigue.
• Unexplained weight gain or loss.
• Hair changes.
• Depression or anxiety.
• Sensitivity to heat and cold.
There’s no universal agreement on when to start thyroid screening, and guidelines differ on when to begin thyroid disease screening — some recommend starting as early as age 35, while others suggest waiting until 60. The U.S. Preventive Services Task Force finds the evidence insufficient to recommend routine screening in people without symptoms.
Your healthcare provider may have different recommendations, especially if you have a family history of thyroid disease or autoimmune conditions.
Follow-up testing is usually guided by symptoms and initial results rather than a fixed schedule.
What’s the difference between TSH and T4?
TSH is the signal from your brain telling the thyroid to make hormones. Free T4 measures the hormone your thyroid actually produces.
Can lifestyle changes improve thyroid function?
Healthy nutrition, stress management, and sleep support overall wellness, but thyroid hormone imbalance usually requires medical evaluation and treatment.
Are thyroid problems common?
Yes. Thyroid disease affects an estimated 20 million people in the U.S., and many cases go undiagnosed. Most involve an underactive thyroid (hypothyroidism), which is more common in women and older adults.
Do thyroid antibodies always mean I have a disease?
Not always. Some people have antibodies without symptoms, but their presence may increase the risk of developing thyroid conditions in the future.
Find your baseline with 120 biomarker tests, then plan for your health breakthrough.
Reviewed by Felix Gussone, MD
Published 11/13/2025
