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Doctor insights on: Tsh Reflex Ft4

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My TSH test results 8 months ago were 1.2 but I was tested again last week and the results of TSH - REFLEX TO FT4 are 1.850. Is this Normal?

My TSH test results 8 months ago were 1.2 but I was tested again last week and the results of TSH - REFLEX TO FT4 are 1.850. Is this Normal?

Lab variation: Not only may the change in this number reflect a normal variation in the labs result without a change in your thyroid function it could represent normal variation of thyroid function within your own body . This might be as a result of variable absorption of any thyroid supplement you are taking or variation in disease activity if you have a disorder such as hashimoto's thyroiditis. ...Read more

Dr. Quang Nguyen
876 doctors shared insights

Thyroid Stimulating Hormone (Definition)

A TSH test measures the amount of thyroid stimulating hormone (TSH) in your blood. TSH is produced by the pituitary gland and tells the thyroid gland to make and release the hormones thyroxine ...Read more


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My TSH reflex to FT4 is 15.66. I have suffered from diarrhea for eleven months now as my Gastro runs a million tests. My PCP just upped my synthroid?

My TSH reflex to FT4 is 15.66.  I have suffered from diarrhea for eleven months now as my Gastro runs a million tests.  My PCP just upped my synthroid?

R/O IBS VS SIBO: IBS is a diagnosis of exclusion. IUC/CROHNS DZ/IBD is inflammation usually DX by BX IBS SX can be managed .You need a full exam and blood work. Especially screen for H pylori . Also stool screen x 3 for occult blood /parasite/ &colonoscopyWhile you are getting these items checked out you should stick to a gluten free diet . Ie gutbliss.com and Wholeapproach.com TXPROBIOTICS/LEVSIN/BENTYL ...Read more

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IF MY TSH W/ REFLEX TO FT4 IS 5.05 WHAT NEEDS TO BE DONE TO LOWER IT?

IF MY TSH W/ REFLEX TO FT4  IS  5.05 WHAT NEEDS  TO  BE  DONE  TO LOWER IT?

Hypothyroidism: Normal TSH is typically 0.45-4.5. Best to discuss results w/ordering physician as some labs have different reference ranges. Regardless, if you have signs & symptoms of hypothyroidism (underactive thyroid = http://www.mayoclinic.org/diseases-conditions/hypothyroidism/basics/definition/con-20021179), prescription levothyroxine will help relieve symptoms but requires close & regular monitoring. ...Read more

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My TSH W/REFLEX TO FT4 result is 0.67. I am 52 and female. What does this mean?

Normal: That's a normal value. That's why they didn't have to run the free t4. Reflex means they will run ft4 only if tsh is abnormal. ...Read more

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Tsh with reflex to FT4 with resulting 2.09 value. What does this mean? Thanks for your help!

Normal: A TSH of 2.09 is normal. Reflex to FT4 means that if the TSH was abnormal the lab would have automatically done further testing by doing a free T4 (FT4) level. Since the TSH was normal, no further testing was done. ...Read more

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My tsh, w/reflex to FT4 results was 4.53 and a month later was 4.49. Do I neef to be on medication?

My tsh, w/reflex to FT4 results was 4.53 and a month later was 4.49. Do I neef to be on medication?

It is better: if you stay on it for a while. Endocrinologist like tsh between .3-3 not .5-5. Discuss with your doctor and see what your doctor will say. ...Read more

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Is TSH w/reflex to ft4 4.06 normal?

Is TSH w/reflex to ft4 4.06 normal?

High normal: A TSH of 4.06 is in the upper range of normal. The lab probably did not do the ft4 level, since the TSH was normal. Most people with these results feel perfectly normal. However, it could be a sign that your thyroid is starting to fail. It would be reasonable to repeat the TSH and do a free T4 level in a few months. ...Read more

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My TSH w/reflex to ft4 results are 15.44. What does this mean?

My TSH w/reflex to ft4 results are 15.44. What does this mean?

HYPOTHRYOID: Your thyroid gland is underactive it is not producing enough thyroxine. The pituitary gland is working overtime to try to get the thyroid gland to produce enough thyroxine which regulates the bodies metabolic rate. You need supplementation of what your gland produces. You also need to be checked for autoimmune thyroiditis, see your doctor. ...Read more

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My TSH W/reflex to FT4 value is 1.73 , results say abnormal, is this range bad?

My TSH W/reflex to FT4  value is 1.73 , results say abnormal, is this range bad?

Thyroid tests: It is advised that you would benefit from an online consultation to review your labs as well as past medical history and discuss your specific symptoms. A physician can help you understand the labs, correlate with your history and make recommended next steps. ...Read more

Dr. Jeffrey Wint
239 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