I have just read an article and I do know that Dr Lowe has stated:-
Four studies I discuss in the critique showed that T4-replacement and T4/T3-replacement leave many hypothyroid patients suffering from hypothyroid symptoms. A fifth study I cite suggests that some patients on T4-replacement develop potentially fatal diseases. The patients also regularly used drugs to control their symptoms of hypothyroidism and the other associated diseases. Other studies I cite showed that patients taking higher-than-replacement doses of thyroid hormone have superior treatment results.
Most people who’ve read the critique find something a bit curious: Despite these recent studies documenting that thyroid hormone replacement therapies harm many patients, endocrinologists have advised that T4-replacement should remain the treatment of choice for hypothyroidism. This is especially curious in that one of the studies suggests that some patients on T4-replacement may die prematurely from diseases associated with hypothyroidism.
Two excerpts re the title of this post:-
Although we should never forget that LT4 is a life-saving thyroid hormone replacement, and that one should not exclude that the pathological reason that leads to the prescription of LT4 could favor the lung cancer development also.
2.Achievement of euthyroid status is monitored by measuring TSH, T3 and T4 plasma levels, mainly in the morning on a empty stomach, a few times in a year, but measuring oxidative stress was never considered a useful tool for adjusting LT4 doses.
PS. How many times is our T3 measured?