Hi I’m waiting for my T4 results but I have my TSH results are 0.6 range 0.3 to 6. I’m currently taking 125mcgs of levo. Is the TSH too low?
TSH too low? : Hi I’m waiting for my T4 results... - Thyroid UK
You need to have FT4 and FT3 test results and the NHS rarely tests the latter. Your TSH is in the range so not too low.
I think it's fine. Some need their TSH suppressed to feel well. It's the doctors who worry that we'll have a heart attack or osteo if TSH is too low but people who've had thyroid cancer have to have a suppressed TSH.
No, it's within range 0.3 - 6.0 so it's not too low.
For what this is worth: Don't worry about your low TSH, mine has been .002 or less for 13 years now and I have no heart problems nor significant osteoporosis - I am old so a little bit of the latter might be expected. Diagnosis by TSH is OK over a certain range from about 2 and up to a high level (I am not sure what the upper limit is, let's say about 100). Over a wide range the relationship is linear or at least a linear polynomial, and the current "mythology" holds true. At very high and very low levels however the relationship is not linear and conclusions cannot be made about overall status of the endocrine system as it relates to the thyroid. In other words, as others have said above, don't worry about low TSH!
How do you feel? Do you still have symptoms?
Just TSH tells nothing. You may have low FT4 or high FT4 and low FT3
If your vitamin levels are too low you can still feel very unwell. Blood tests can look "normal" but you can have very low conversion of T4 to T3
Ask GP to test vitamin D, folate, ferritin and B12
Do you have Hashimoto's? Confirmed by high thyroid antibodies. If not been tested ask that they are
For full evaluation you ideally need TSH, FT4, FT3, TT4, TPO and TG antibodies, plus vitamin D, folate, ferritin and B12 tested
See if you can get full thyroid and vitamin testing from GP. Unlikely to get FT3, but it's essential
Private tests are available
Medichecks Thyroid plus ultra vitamin or Blue Horizon Thyroid plus eleven are the most popular choice. DIY finger prick test or option to pay extra for private blood draw. Both companies often have money off offers.
All thyroid tests should be done as early as possible in morning and fasting and don't take Levo in the 24 hours prior to test, delay and take straight after. This gives highest TSH, lowest FT4 and most consistent results
Link about antibodies
Link about thyroid blood tests
Print this list of symptoms off, tick all that apply and take to GP
See Box 1. Towards end of article
Some possible causes of persistent symptoms in euthyroid patients on L-T4
You will see low vitamin D, folate, ferritin and B12 listed
Your TSH is fine. Anyway, TSH is largely irrelevant when on meds. If you have Hashis, you might need it even lower. The important thing is to keep your free T4 and free T3 in the top quarters of their ranges - that's what defines how you feel
Thanks for the advice. I have noticed that since I upped my levo my hair has started to fall out and I thought it was due to the TSH levels. Any advice?
Lot of things cause hair loss, but TSH is not one of them. Free t4 or free T3 too high or too low, ferritin/iron too low, B vitamin deficiency, too much testosterone aromatising to DHT (ie sex hormone imbalance) to name a few. You need to get a full thyroid panel done and get ferritin, B12, folate and vitamin d tested. TSH is NOT a thyroid hormone and doesn't always do what we have been told it does - it definitely doesn't tell you on its own whether you are over or undermedicated. Doctors may tell you it does, as it a very cheap test, but it does not.