Thyroid Bloodwork Results Please Help

I had a feeling that my thyroid is off and finally did a bw to see what’s going on, now I don’t know if I did enough tests but from what I’ve read I did the following tests:
T3, T4, FT3, FT4, TSH.

The thing is I don’t understand why my ft3 and ft4 are on the upper limit of reference range, but my t3 and t4 are borderline underactive or hypothyroid?
Guys please help me to understand what is going on, before I go on meds or make some stupid decision, cuz when something is off I tend to jump the gun… thanks.


Edit: TTH is TSH and LT is FT just to be clear.

It would seem you’re converting T4 → fT4 → fT3 well, which is why TSH is at the median value <1.5. You have plenty of the active hormone which is what matters, if fT3 were low along with T4, then that would indicate a problem.

I tried NDT and after the second dosage started experiencing hyperthyroid symptoms, stopped and no ill effects. It was a gradual taper of the hyperthyroid symptoms and then back to normal within a week.

So it means that total t3 and t4 are useless?

I sometimes feel that I have under active thyroid, of course I go by the symptoms and only did bw once, but I always felt that I should be cutting bf easier than this…

I’m 25 not 40 and I have to starve myself to get good results, I’m also 220 pounds or 100kg at ~16% bf and cutting is hard for me, lowest I’ve been is probably ~11-12% and I was too damm hungry all the time and I also gain weight way too easy.

Thyroid hormone is a lot better at burning off your hard earned muscle than it is your fat. Especially T3.

Are you taking a lot of biotin? That can skew the blood test significantly.

What is your diet and exercise program like?

I’m not taking bioting supplements or something.

My diet is ~3000 calories to maintain weight 230-250g. Protein, fats 25% and the rest are carbs. I’m not out of shape don’t get me wrong, I’m almost 6’2 220 pounds and about 15-16%.

What I really want to know why my total T3 and total T4 are so low? What does it mean, cuz logic tells me that if I have low T4 and it’s not not enough to convert to T3, so I might need exogenous T4 or levothyroxine.

T3 is only useful in diagnosing hyperthyroidism and not very useful or informative when diagnosing hypothyroidism.

The T4 is stored thyroid hormone and is inactive. Everyone stores and burns calories at different rates regardless of age.