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Help needed interpreting bloods

Right, these are the bloods that I had done privately last year

TSH 3.89 range 0.27 - 4.2

Free T4 14.4 range 12.0 - 22.0

Free T3 5.0 range 3.1 - 6.8

Is free T3 the same as Total Tri-iodothyronine (T3) as this is the only T3 on the NHS list of blood samples.

The private lab used the same ranges as my local hospital except for the T3 which is higher, as the local labs is 2.6

Any advice welcome


Ann xx

7 Replies

no total T3 and free T3 are not the same thing


Hi Ann,I would get antibodies tested.I know it's more expense but sadly the nhs budget will not stretch to basically any half decent blood test.Basically you will find you have to do all the legwork yourself which is a real sad state of affairs.Your ft4 and ft3 are similar to what mine were.It was just my TSH was higher and I had antibodies which swung it for me.Unfortunately most GP's see tests results within the range as normal.There is no normal though it is just a reference range.Keep plugging away.




FT3 is that which is usable as opposed to TT3 which is bound to proteins.

My TSH was 3.6 with the free's similar to yours when I was dx'd Hypothyroid so using that as a 'benchmark' you are too.


Total T3 is T3 bound to proteins PLUS free T3, which is why it's useless because you don't know how much of it is free.


Remind me - are you on treatment?

Have you been tested since these ones?

How are you feeling?

I would suggest that TSH could be lower, T4 & T3 higher, but it depends very much on how you are feeling...




Hi Louise, not on treatment despite one consultant that I saw in the summer telling me that I needed to, and sent me to see the endo, who flat out refused any treatment.

Ann xx


Hi My endo says the only T3 test any use is Free T3. I always use it as I have low T3. Looks like you would benefit from a little T3 on a script. It lowers the TSH , helps weight ( if applicable) and can make a huge difference. I need mine almost at the top of range.Most Labs have different ranges for most tests as ,it depends on assays used.With the ranges that is Ok but of course, more helpful to use the same Lab as far as possible. I have to use 4 , circumstances dictate!

Best wishes,



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