Thyroid blood test results

[Healthworrierextraordinaire]

I had blood tests done a few weeks ago as I have been next level tired and really achy and stiff constantly for months. A few things came back a bit off and GP is doing follow up blood test for liver function. However one of the Thyroid levels was also a bit low. GP adamant it isn't "clinically relevant" and won't even repeat.

Serum TSH level 0.99 mU/L [0.35 - 5.5]
Serum free T4 level 10.2 pmol/L [10.5 - 21.0]; Below low reference limit

Just wondered if these levels have in anyone else's experience been an indicator of their Thyroid being a bit off? Or am I worrying about nothing?

Hopeful bump 🙂

Tricky as tsh is ok but t4 is a tad lowish.

If you're low in ferritin it can affect thyroxine production.

Did you get any other tests done? Eg vit d which sometimes can also go hand in hand?

Do you take any vitamins?

I had FBC which was fine other than mildly low platelets (normal for me)

B12 and Ferritin look ok?

VITAMIN B12 TATT, aching, hormonal, sweating
Requested By: PILK-LSS-NHS-4330077701
Serum vitamin B12 level 332.0 ng/L [211.0 - 911.0]

FERRITIN TATT, aching, hormonal, sweating
Requested By: PILK-LSS-NHS-4330077701
Serum C reactive protein level 6 mg/L [0.0 - 9.0]; Please note change of method and reference interval. For further
information please contact the Biochemistry Duty Doctor.
Serum ferritin level 52.9 ug/L [10.0 - 291.0]

Can't see Vit D so don't think it was done.

I don't currently take any supplements but have a pretty good, varied diet.