Question about Vitamin D testing

[Nessie54]

Just back from a latest appointment with the GP, and it appears that even though they've tested for anemia as well as infections etc, they've not yet tested for Vitamin D.

Since I received the private tests (below) i know I'm deficient, so have been taking 5000iu for the last two weeks to improve my levels and was going to test again in Dec/Jan. Do you have stop supplementing or leave a number of hours between taking the supplements and testing? I now supplement with Vit D, Vit B complex, methyfolate and selenium.

Incidentally it was the first (and last) time I saw this particular GP, she wanted to reduce my dose down from 125mg Levo, which I refused as never felt good on 100mg as TSH should be "between 2 and 3"!!!! Ask asked if I was depressed to which I responded NO! Seen 3 different GPs during the 7 years I've been diagnosed, and all the others have used clinical judgement as well as TSH and fT4 to keep me on my dose.

Today's results:

TSH 0.638 (0.27 - 4.20)

fT4 18 (12.00 - 22.00)

Private testing:

Oct [and May's in brackets]

THYROID STIMULATING HORMONE 0.918 [1.44] mIU/L 0.27 - 4.20

FREE THYROXINE 18.3 [19.34] pmol/L 12.00 - 22.00

TOTAL THYROXINE(T4) 105.0 [114.9] nmol/L 59.00 - 154.00

FREE T3 4.57 [3.61] pmol/L 3.10 - 6.80

REVERSE T3 23 ng/dL 10.00 - 24.00

REVERSE T3 RATIO *12.94 15.01 - 75.00

THYROGLOBULIN ANTIBODY *360.000 IU/mL 0.00 - 115.00

THYROID PEROXIDASE ANTIBODIES *321 IU/mL 0.00 - 34.00

ACTIVE B12 122.0 pmol/L 25.10 - 165.00

FOLATE (SERUM) *1.95 ug/L 2.91 - 50.00

25 OH VITAMIN D *33.7 nmol/L 50.00 - 200.00

CRP - HIGH SENSITIVITY *5.8 mg/l 0.00 - 5.00

FERRITIN 89.6 ug/L 13.00 - 150.00

[bluebug]

Biotin in vitamin B complex can muck up blood tests so you should stop the vitamin B complex for 48 hours.

In regards to the vitamin D test I once got a high result due to how I was taking supplements as I was told to mega dose due to my severe deficiency, so I would leave a minimum of 3 days between taking them and testing them.

Oh and well done for pushing back on the depression angle.

[Nessie54 in reply to bluebug]

Thanks bluebug - have two weeks before I can get a phlebotomists appt so plenty to time to stop a few days in advance of blood draw.

Not only did I have the depression angle, was also told being a part-time working mum of 2 young boys was hard... sigh