Top
20
Doctor insights on: What Is Normal Level Reflex Free T4

Share
1

1
Tsh w\reflex to free t4 is. 22. Free t4 is 1.65 is this normal. I take 75 synthroid?

Tsh w\reflex to free t4 is. 22. Free t4 is 1.65 is this normal. I take 75 synthroid?

Yes.: All laboratory results need to be interpreted in the clinical context and the doctor who ordered the tests is usually in the best position to do that. Having said that, free T4 value is normal. The low TSH suggests need for a discussion with your doctor about reducing the dose of synthroid.
For good health - Have a diet rich in fresh vegetables, fruits, whole grains, milk and milk products, nuts, beans, legumes, lentils and small amounts of lean meats. Avoid saturated fats. Drink enough water daily, so that your urine is mostly colorless. Exercise at least 150 minutes/week and increase the intensity of exercise gradually. Do not use tobacco, alcohol, weed or street drugs in any form.
Practice safe sex, if you have sex.
Get HPV vaccine, if you are under 27 years of age.

Dr. Sheila Smith
269 Doctors shared insights

Free T4 (Definition)

T4 is the main hormone produced by the thyroid gland total T4 is amount in blood stream attached to albumin, as well as 'free' in blood stream. Free T4 is just the amount free in serum, ...Read more


2

2
I had a TSH REFLEX TO FREE T4 blood test done, my result is 3.70 (0.40-4.50 mIU/L), is this normal? Thank you.

I had a TSH REFLEX TO FREE T4 blood test done, my result is 3.70 (0.40-4.50 mIU/L), is this normal? Thank you.

Thyroid function: That appears to be within the normal range, based on the laboratory standard you provided.

3

3
Blood test shows TSH w/ reflex to FT4 is 13.62 (high) & Free T4 is 1.1 (normal). How would you describe what these results mean?

Blood test shows TSH w/ reflex to FT4 is 13.62 (high) & Free T4 is 1.1 (normal). How would you describe what these results mean?

Thyroid tests: 26F US had TSH 13.6 and Ft4 1.1. Asks: How could you describe what these results mean? ANS: Need 2 know lot more about U which ur Drs already knows so better to ask them. Such as 1. U on BCP? 2. Why was test done? 3. Hx of thyroid problems n past? 4. Taking thyroid meds? 5. Pregnant? As TSH is high, u did not give normal lab range for FT4 but it seems lowest range of normal. Hypothyroid?

4

4
TSH reflex free T4 test = 2.51 (normal range 0.35-4.50). I've read hyperthyroidism still possible if TSH normal. Do I need another test?

TSH reflex free T4 test = 2.51 (normal range 0.35-4.50). I've read hyperthyroidism still possible if TSH normal. Do I need another test?

TSH: Highly unlikely. That said, your doctor should have ordered TSH and T3 (liothyronine) as well as T4. Please go back to him/her or if you are not satisfied have a friend or family refer you to a better doctor.

5

5
My TSH with reflex to free T4 and T3 (liothyronine) came out to a range of 1.0. Is that normal? Been feeling horrific since I gave birth 5 months ago.

My TSH with reflex to free T4 and T3 (liothyronine) came out to a range of 1.0. Is that normal? Been feeling horrific since I gave birth 5 months ago.

That's a normal TSH: Hi. That's a normal TSH, but testing TSH alone only tests dysfunction of the thyroid gland itself. You need to get a TSH AND a free T4 (i.e., NOT "reflex") to see pituitary hypothyroidism (which, btw, can occur in rare cases associated with a particularly bloody delivery). Of course many problems can make you feel horrific. Can you make milk? I don't know what is wrong, but you need further eval.

6

6
My t4 free is 0.70 and my tsh reflex free t4 is 29.2. What does this mean and what do I need to do?

My t4 free is 0.70 and my tsh reflex free t4 is 29.2. What does this mean and what do I need to do?

Hypothyroidism: This is diagnostic of hypothyroidism and should be treated with thyroid hormone replacement which hopefully was done by the doctor who got these labs. While without a little more history is there is the remote chance of thyroiditis, it is unlikely with a TSH in this range. While EASILY TREATABLE, hypothyroidism can be a serious and even eventually a life threatening disease.

8

8
My TSH w/reflex to FT4 test came back at 6.73, but my free T4 came back at 1.24. I have previous has similar results to these tests.

Mild hypothyroidism: The elevated TSH means that your pituitary gland is not happy with your thyroid level, and would like to see it higher despite the "normal" free T4 level. If you do not have any symptoms of hypothyroidism, we call this "subclinical hypothyroidism". Treatment may not be needed unless you develop symptoms or the TSH goes progressively higher. You should not start treatment based on one abnormal test

See 1 more doctor answer
9

9
TSH W REFLEX FREE T4 TSH, 3RD GENERATION (0.40-4.00) uIU/ML My results are 1.10 I had this test taken. Can you explain what the results mean?

TSH W REFLEX FREE T4 TSH, 3RD GENERATION (0.40-4.00) uIU/ML My results are 1.10 I had this test taken. Can you explain what the results mean?

Normal, but...: THIS IS A NORMAL THYROID SCREENING TESTS. There are rare diseases thyroid that can happen with an normal normal TSH, but you would have symptoms of thyroid disease or other evidence of central hypothyroidism or thyroiditis in a "euthyroid phase, " which would be rare and require much more history. If there is ongoing concern see an endocrinologist. IF YOU GENERALLY FEEL WELL GREAT, IT IS NORMAL!

See 2 more doctor answers
10

10
I have a blood test done and my TSH reflex to free T4 is 4.53. 50-4.30 miu/l is that bad?

I have a blood test done and my TSH reflex to free T4 is 4.53. 50-4.30 miu/l is that bad?

I agree to a point!: Tsh slightly elevated. Your body thinks your thyroid is low. The most common cause for hypothyroidism is hashimoto's thyroiditis, which can be indentified by the presence of anti-thyroglobulin antibodies and anti-tpo antibodies. Have these tests. If positive, I would place you on thyroid immediately. I would also have my free-t3 checked as well. Some do not convert T4 to t3!

See 1 more doctor answer
12

12
What to do if I had a blood test done and my TSH reflex to free T4 is 4.53. 50-4.30 miu/l is that bad?

Further workup: A TSH above normal indicates that your brain is telling your thyroid it needs better thyroid function. Have your free T4, free T3 (liothyronine), (liothyronine) Reverse T3 (liothyronine), (liothyronine) thyroglobulin and TPO antibodies, Ferritin, and SHBG levels checked to ensure the thyroid and tissue utilization/conversion to active thyroid is occurring. Furthermore, these levels should be optimized...TSH 3.6, low Rev T3 (liothyronine)

See 1 more doctor answer
13

13
My TSH is 9 & my TSH Reflex to Free T4 is 1.29, I still feel Fatigued & I don't feel well should I have my Dosage of Levothyroxine increase to 100 MCG?

My TSH is 9 & my TSH Reflex to Free T4 is 1.29, I still feel Fatigued & I don't feel well should I have my Dosage of Levothyroxine increase to 100 MCG?

TSH values: The TSH is your pituitary gland at the bottom of your brain talking to your thyroid gland saying "I don't see enough thyroid hormone around here." It stands for Thyroid Stimulating Hormone. You should speak to a good endocrinologist about your situation pronto and yes you should be on a higher dose of thyroid replacement hormone.

14

14
Tsh w reflex to free t4 component results value std range 2.55 0.45-4.5 is my test results good or bad at 2.55?

Normal: The value for TSH in the scenario you decribed is normal. However, like all lab tests, interpretation must be done with attention to the bigger picture.

16

16
Blood results came back with a 4.27 (h). Tsh, reflex to free T4 tsh, highly sensitive. Leukocyte esterase - moderate hemoglobin - trace / WBC 6 (h)?

Blood results came back with a 4.27 (h). Tsh, reflex to free T4 tsh, highly sensitive. Leukocyte esterase - moderate hemoglobin - trace / WBC 6 (h)?

Reverse T3 (liothyronine): Check free T3 and reverse t3. Ft3 should be in upper range and rt3 in lower range. If your ratio is off, you may need Armour Thyroid or t3, and synthroid (thyroxine) would be the wrong med for you. Also consider checking thyroid antibodies.

See 1 more doctor answer
17

17
Hi, I am a 37 year old female. History of excessive thinning hair. My TSH reflex to free T4=. 9. My ferritin= 17. My calc % Iron Sat= 20. Thoughts?

Hi, I am a 37 year old female. History of excessive thinning hair. My TSH reflex to free T4=. 9. My ferritin= 17. My calc % Iron Sat= 20. Thoughts?

Normal: Hair thinning is a very common complaint. Usually one can find no particular cause, though many medical conditions, medications, stress, age, genetics, nutrition, all influence hair growth. Your thyroid, and iron levels appear normal and are therefore unlikely to be a cause for hair loss.

18

18
Tsh with reflex free T4 1.09, free T4 1.00 t3 (liothyronine) total 91. Feel horrible very weak, hair falling, weight gain endo and GP said I'm fine no further tests?

Tsh with reflex free T4 1.09, free T4 1.00 t3 (liothyronine) total 91. Feel horrible very weak, hair falling, weight gain endo and GP said I'm fine no further tests?

Thyroid: The lab numbers look OK. Weight gain is no good for you as you know. Please go online and look up the many articles a bout food. My favorite is "NuVal" - look it up. Also consider seeing an athletic trainer.

20

20
Could you have high total T4 levels but have normal free T4 levels?

Could you have high total T4 levels but have normal free T4 levels?

Yes: Total T4 reflects T4 bound to proteins in your blood. Free T4 measures the amount of T4 that is free and not bound so that it can be metabolically active. Thus women taking Estrogens (as in bc pills) have elevated levels of thyroid binding globulin and elevated total t4, but normal free t4.

Dr. David Sneid
1,413 Doctors shared insights

Thyroxine (Definition)

Thyroxine is a thyroid agent. ...Read more