Free T3 test

[sweepandollie]

Recent blood test results via GP.

TSH. 0.10 (0.30-5.50)

T3. 4.9 (3.10-7.00)

T4. 23.2 (11.50-22.70)

The lab obviously not happy with TSH so did T3 for the first time.

Grateful for any comments.

[SeasideSusie Remembering]

sweepand dollie

What thyroid meds do you take?

When did you take your last dose before this test?

We always advise:

* Book the first appointment of the morning, or with private tests at home no later than 9am. This is because TSH is highest early morning and lowers throughout the day.

In fact, 9am is the perfect time, see first graph here, it shows TSH is highest around midnight - 4am (when we can't get a blood draw), then lowers, next high is at 9am then lowers before it starts it's climb again about 9pm:

healthunlocked.com/thyroidu...

If we are looking for a diagnosis of hypothyroidism, or looking for an increase in dose or to avoid a reduction then we need TSH to be as high as possible.

* Nothing to eat or drink except water before the test - have your evening meal/supper as normal the night before but delay breakfast on the day of the test and drink water only until after the blood draw. Certain foods may lower TSH, caffeine containing drinks affect TSH.

* If taking thyroid hormone replacement, last dose of Levo should be 24 hours before blood draw. If taking NDT or T3 then last dose should be 8-12 hours before blood draw, split dose and adjust timing the day before if necessary. This avoids measuring hormone levels at their peak after ingestion of hormone replacement. Take your thyroid meds after the blood draw. Taking your dose too close to the blood draw will give false high results, leaving any longer gap will give false low results.

* If you take Biotin or a B Complex containing Biotin (B7), leave this off for 7 days before any blood test. This is because if Biotin is used in the testing procedure it can give false results (most labs use biotin).

These are patient to patient tips which we don't discuss with phlebotomists or doctors.

If you did your test this way then your results show an over range FT4 at 104.46% and a low FT3 at 46.15%. This shows poor conversion of T4 to T3.

Are your key nutrients optimal - Vit D, B12, Folate, Ferritin? These all need to be optimal for thyroid hormone to work properly and good conversion of T4 to T3.

[SlowDragon Administrator]

When were vitamin D, folate, ferritin and B12 levels last tested

What vitamin supplements are you currently taking

Looking at old post from 3 years ago you had terrible B12

On levothyroxine we must have OPTIMAL Vitamin levels

[sweepandollie in reply to SlowDragon]

Medichecks results from August:

Ferritin: 124 (13-150

Vit D: 219 (50-200)

B12: 121 (37.5-150)

Folate: 7.52 (>3.89)

[SlowDragon Administrator in reply to sweepandollie]

vitamin D a bit high

Folate a bit low….but probably because you stopped vitamin B complex before test?

[Cornwaller]

How are you? It is difficult to interpret blood results without information about well being and symptoms and history and current medication.