According to the research of Dr. Ray Peat many people have low thyroid function/hypothyroidism without knowing it.
You might be suffering from many of the typical hypothyroid symptoms and have been trying to address the symptoms individually, when in reality correcting the underlying energy deficiency is the core issue.
Even though your blood tests for thyroid function falls within the normal range, you can still have symptoms of low thyroid function:
The blood levels of total T4, total T3 and TSH can provide useful information on the thyroid function. However, it is important to understand that the normal ranges for these hormone have been made very wide, thus hypothyroid people often fall within the normal ranges.
In addition a normal level of the thyroid hormones T4 and T3 in the blood is not necessarily a correct indicator of thyroid function, because the thyroid hormones will have variant effects on the cells depended on the presence of other factors such as polyunsaturated fats, estrogen, cortisol, Adrenalin, available sugar as well as the level of protein in the diet. In BiochemNordic’s health program Module 2, it is described how these factors directly affect the conversion of storage thyroid hormone T4 to the active thyroid hormone T3 and the cellular response to the T3 hormone.
Therefore the measured value of total T4, total T3 and TSH, should always be combined with the evaluation of the persons symptoms, as well as pulse and temperature measurements to better determine the actual thyroid function on the cellular level.
Learn the symptoms of low thyroid function, and how you can test your thyroid function on the cellular level using pulse and temperature here.