So Ive done some research on "optimal thyroid levels" for some time now. I am a patient myself and I haven't had many benefits from thyroid medications. The only difference i notice is Im warmer and I sweat easier. This isnt about my symptoms yada yada... This is about what really is optimal thyroid levels? When trying to find out what optimal levels are its easy to find the "ft3 must be in the upper 1/4 of the range to feel well blah blah blah". Digging further and actually looking at the research I have found that there are many negative associations with having higher thyroid levels within the normal range.
1) From european journal of endocrinology
Conclusion
: We show that a less favorable body composition (with higher fat and lower muscle mass
and accompanying higher leptin concentrations) and IR are associated with higher thyroid hormone
levels in healthy young men with well characterized euthyroidism
http://www.eje-online.org/content/167/5/719.full.pdf
2) This study found positive correlations between %BF, fat mass, insulin resistance, LDL
http://www.endocrine-abstracts.org/ea/0049/ea0049EP684.htm
3) Study found increase in tsh and free t3 correlated with bmi and waist circumference.
4) thyroid levels in jordanian athletes
http://www.academicjournals.org/journal/SRE/article-full-text-pdf/71DA4DA31779
Look at the levels in these athletes
5) Thyroid hormones are positively associated with insulin resistance early in the development of type 2
https://www.researchgate.net/public...e_early_in_the_development_of_type_2_diabetes
How can having ft3 in the upper 1/4 of the range be recommended by any doctor today? There are many studies showing higher ft3 is not "optimal". I would like feed back on this information. This cannot be overlooked...
1) From european journal of endocrinology
Conclusion
: We show that a less favorable body composition (with higher fat and lower muscle mass
and accompanying higher leptin concentrations) and IR are associated with higher thyroid hormone
levels in healthy young men with well characterized euthyroidism
http://www.eje-online.org/content/167/5/719.full.pdf
2) This study found positive correlations between %BF, fat mass, insulin resistance, LDL
http://www.endocrine-abstracts.org/ea/0049/ea0049EP684.htm
3) Study found increase in tsh and free t3 correlated with bmi and waist circumference.
4) thyroid levels in jordanian athletes
http://www.academicjournals.org/journal/SRE/article-full-text-pdf/71DA4DA31779
Look at the levels in these athletes
5) Thyroid hormones are positively associated with insulin resistance early in the development of type 2
https://www.researchgate.net/public...e_early_in_the_development_of_type_2_diabetes
How can having ft3 in the upper 1/4 of the range be recommended by any doctor today? There are many studies showing higher ft3 is not "optimal". I would like feed back on this information. This cannot be overlooked...