19 year old son, blood results. Only taking 75mcg levothyroxine but results show high T3?

[Bubydizer]

Hi everyone,

My 19 year old son is having symptoms returning. Backround tiredness, low resistance to bugs and migraines seem to be comming back. He has been on Levo 75mcg for 3 months. Initially Doctor started him on 25mcg Levo last summer.

He has responded really well to the levo, resolving most of his symptoms, regular migranes, constant fatigue and he has gained a little weight.

We did a blood test recently thinking he may need an increase but his T3 is really high. So would anyone know why this is? Should he stay on this dose? Just trying to work out what to ask the Doctor.

He is taking recommended B complex, Vitamin D3+K2 and Magnesium.

21.03.24

FT3 3.76 ( 1.58 - 3.91 )

FT4 0.97 ( 0.70 - 1.48 )

TSH 0.90 ( 0.35 - 4.94 )

11.09.23

Vitamin B12 694 pg/ml ( 300 - 883 )

Folate 10.1 ng/ml ( 3.9 - 20.5 )

Ferritin 111.4 ng/ml ( 21 - 275 )

Vitamin D 59.7 ng/ml ( 30 - 100 )

Any information would be really helpful, Thank you.

[SlowDragon Administrator]

presumably he has Hashimoto’s

Levels hop up and down, especially early on

Retest again in another 6 weeks

Did he stop vitamin B complex (contains biotin) 5-7 days before the test

Was test early morning and last dose levothyroxine 24 hours before test

Is he on gluten free or dairy free diet

[Bubydizer in reply to SlowDragon]

Hi SlowDragon, thank you for your response. He didn't test positive for Hashimotos but his Aunt (my sister has) my daughter and I haven't either. Yes, he stopped the B Complex a week before. Test about 8.30 am fasting, Levo 24 hours before test. He is not gluten free or dairy free. He is fussy with food but he has been gaining some weight. I will test him again in 6 weeks. This really helps thank you so much.

[SlowDragon Administrator in reply to Bubydizer]

He didn't test positive for Hashimotos but his Aunt (my sister has) my daughter and I haven't either

Has he (and your sister and your daughter and yourself ) had both TPO and TG thyroid antibodies tested and ultrasound scan of thyroid

Significant minority of Hashimoto’s patients only have high TG antibodies (thyroglobulin)

NHS won’t test TG antibodies unless TPO are positive

20% of Hashimoto's patients never have raised antibodies

healthunlocked.com/thyroidu...

Paul Robson on atrophied thyroid - especially if no TPO antibodies

paulrobinsonthyroid.com/cou...

[Bubydizer in reply to SlowDragon]

Hi SlowDragon, Thank you for the information. Yes we have all had both antibodies tested. My daughter and I have had ultrasound scans. Scaring found on daughter's scan. My thyroid is small and have small cyst. But maybe I should ask son's Doctor for a scan for him. We will test again in 6 weeks and then see his Doctor. Hopefully, he will do a scan.

Thank you.

[SlowDragon Administrator in reply to Bubydizer]

My thyroid is small

So probably Ord’s thyroiditis and autoimmune

en.wikipedia.org/wiki/Ord%2....

[SlowDragon Administrator in reply to Bubydizer]

see his Doctor. Hopefully, he will do a scan.

If GP won’t do scan, private one is £100 approx

thyroiduk.org/?s=Ultrasound+

[Bubydizer in reply to SlowDragon]

Yes, either way we will get a scan. Thank you so much for all the information. Have a good weekend.