Thyroid , would boosting T4 help anything

[SS1LE]

So over the years my Free T4 has went down a little, Any benefits to taking T4 , any certain dose?

My RT3 was normal also
Reverse T3, Serum A 14.5 ng/dL 9.2 - 24.1

 

[Seagal]

It might increase shbg

 

[SS1LE]

From reading, it seems most recommend the free T4 to be on the higher end scale. I can get levothyroxine , just don’t know a good starting dose.

 

[Seagal]

From reading, it seems most recommend the free T4 to be on the higher end scale. I can get levothyroxine , just don’t know a good starting dose.

Your fT3 is in the middle. This seems to be fine.
I wouldn't mess around with it. TSH is good too.

 

[FunkOdyssey]

Your fT3 is in the middle. This seems to be fine.
I wouldn't mess around with it. TSH is good too.

This, because free T3 is what matters. It would be analogous to supplementing testosterone when your total testosterone is on the low side, even though your free testosterone was at a good level.

You don't want high or "optimal" levels of thyroid hormone either - this is associated with a shorter lifespan. Think "live fast, die young".

Post in thread 'Thyroid Hormones May Increase Risk of Cognitive Disorders in Older Adults'

Nov 7, 2023

Another piece of evidence against overenthusiastic thyroid "optimization".

Here are some additional studies that outline a "live fast, die fast" relationship between thyroid hormone and longevity. Crank it up at your peril:

Thyroid status, disability and cognitive function, and survival in old age - PubMed

In the general population of the oldest old, elderly individuals with abnormally high levels of thyrotropin do not experience adverse effects and may have a prolonged life span. However, evidence for not treating elderly individuals can only come from a well-designed, randomized...

pubmed.ncbi.nlm.nih.gov

Familial longevity is associated with decreased thyroid function - PubMed

Our findings support the previous observation that low thyroid activity in humans constitutes a heritable phenotype that contributes to exceptional familial longevity observed in the Leiden Longevity Study.

pubmed.ncbi.nlm.nih.gov

Human longevity is characterised by high thyroid stimulating hormone secretion without altered energy metabolism - PMC

Few studies have included subjects with the propensity to reach old age in good health, with the aim to disentangle mechanisms contributing to staying healthier for longer. The hypothalamic-pituitary-thyroid (HPT) axis maintains circulating levels ...

www.ncbi.nlm.nih.gov

Association of Thyroid Function With Life Expectancy With and Without Cardiovascular Disease: The Rotterdam Study - PMC

Are there differences in total life expectancy and life expectancy with and without cardiovascular disease within the reference range of thyroid function? This population-based cohort study found significant differences in life expectancy within the ...

www.ncbi.nlm.nih.gov

Thyroid function and life expectancy with and without noncommunicable diseases: A population-based study - PMC

Variations in thyroid function within reference ranges are associated with increased risk of diseases and death. However, the impact of thyroid function on life expectancy (LE) with and without noncommunicable diseases (NCDs) remains unknown. We ...

www.ncbi.nlm.nih.gov

• FunkOdyssey

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Post in thread 'First post. Can’t get E2 under control, starting to worry'

Mar 5, 2024

That's what makes you a lot smarter than Cataceous. Taking thyroid, and raising thyroid levels in a person with sub clinical hypothyroidism or hypothyroidism itself, is not the same in anyway, as a person with true hyperthyroidism. In other words, taking thyroid does not cause the same medical sequela as a person with true hyperthyroidism. And hyper thyroidism there is an auto immune component, and that's what does the damage. So once again, an example of why cat, TaciousAnd hyper thyroidism there is an auto immune component, and that's what does the damage. So once again, an example...

• FunkOdyssey

• 

 

[Vince]

I agree with everyone. I wouldn't supplement with t4 with your free t3 in a good range.

 

[Systemlord]

When I checked all of my thyroid parameters, fT4 is always at the bottom of the range and fT3 near the top. This just shows I convert fT4 -> free T3 very efficiently.

I even tried some fT4/fT3 and only bad things happen to me.

 

[SS1LE]

Thanks all , i will just not worry about it then. I just saw the drop in FT4 over years and it had me wondering

 

[FunkOdyssey]

Thanks all , i will just not worry about it then. I just saw the drop in FT4 over years and it had me wondering

Mine is also like this (lower end FT4, midrange FT3) and past experiments with supplementing thyroid hormone only made me feel worse. Knowing what I know now, I never would have messed with it at all.