Thyroid Test

Sale price$145.00



You should take this test if you

✔  Are an adult age 40+

✔  Feel sluggish and fatigued

✔  Have difficulty losing weight

✔  Feel cold often


Potential Symptoms

Levels of the four thyroid-related biomarkers tested can indicate whether your thyroid is under-functioning (hypothyroidism) or over-functioning (hyperthyroidism).

Symptoms Related to Underactive Thyroid 

An underactive thyroid gland doesn’t produce enough T3 and T4.

  • Fatigue
  • Weight gain
  • Depression
  • Joint and muscle pain
  • Sensitivity to cold
  • Cold hands and feet
  • Difficulty concentrating
  • Mental fogginess 
  • Dry skin and hair  
  • Frequent, heavy periods
  • Constipation 
  • Slowed heart rate+
  • Swelling in the neck from an enlarged thyroid gland 

+Slowed heart rate (bradycardia) – commonly less than 60 beats per minute


Symptoms Related to Overactive Thyroid

An overactive thyroid gland produces higher than normal amounts of T3 and/or T4.

As a result, you might experience:

  • Unexpected weight loss+
  • Increased appetite
  • Rapid heartbeat++
  • Nervousness, anxiety, and irritability
  • Tremors in hands or fingers 
  • Sweating
  • Changes in menstrual patterns
  • Increased sensitivity to heat
  • More frequent bowel movements
  • Swelling in the neck from an enlarged thyroid gland 
  • Fatigue and muscle weakness
  • Difficulty sleeping
  • Skin thinning
  • Fine, brittle hair

+ Unexpected weight loss, even when your appetite and the amount and type of food you eat remain the same or even increase

++ Rapid heartbeat (tachycardia) — commonly more than 100 beats a minute; or irregular heartbeat (arrhythmia); or pounding of your heart (palpitation


What we measure

Thyroid Hormones  •  Blood Spot

Free T3, Free T4, TSH

Thyroid hormones regulate how fast or slow the body’s cells work – everything from how fast or slow the heart beats to how quickly or slowly the intestines process food.


Thyroid Antibodies  •  Blood Spot


The presence of antibodies in the blood directed against some aspect of the thyroid gland suggests that a thyroid hormone imbalance could be autoimmune related. Thyroid peroxidase antibodies (TPOAb) are among the most clinically relevant of these.



Thyroid Test (Blood Spot Collection)

1. Test Activation 

Login to You will send you an invitation email for you to sign up and log in for Thorne Research website. Click the ‘Activate Test’ button on top of the main homepage, and  Enter a 6-digit activation code on the back of the plastic clamshell box. To see your test result summary on’s ‘Test Result’ section, you MUST enter your ‘Test Status’ section and click the gray button to change its color to pink.  


2. Sample Collection 

You may collect your blood sample on any day you choose. Collect your sample in the morning before taking any medications. Don’t forget to write your name and the date and time of collection on the collection card prior to collecting.  Wipe finger with alcohol prep pad and select finger. Position finger oer circle of blood collection spot card and, as blood drop is ready to fall, touch drop to center of circle (one drop per circle). Continue collection until at least 6 circles have been filled.   


3. Sample Return 

Place the collection card into the plastic box in which they arrived. (Do NOT throw away the plastic box.) Apply a return label to the envelope and leave the envelope inside a mailbox or take it to any U.S. Postal Service (USPS) facility. Your shipping cost is prepaid.


What you'll discover


Your personal biomarker values are displayed on an easy-to-read dashboard with descriptions of what each biomarker value means for you.


Using your biomarkers, we provide detailed insights to help identify potential health risks or specific areas of improvement. Insights are generated using the Onegevity Health Intelligence platform.

Improvement Plan 

Based on your unique results, a comprehensive improvement plan with diet, activity, and supplement recommendations is generated.

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