You can vary by hours.... T4 (levothyroxine) has a long half life in the body....190 hours.
T4 is stored in tissues and on special proteins in the blood that carry it around...once you have been on it...you will have a huge hedge for time changes. T3 on the other hand has a short half life of a few hours (less than 5).
Some people with normal TSH and low T4 values, may benefit from Iodine supplements. I don't feel comfortable with the new ultra high doses of Idoral some doctors give. But you could take a kelp extract that has 150mcg in each tablet...take 2 of those to increase your iodine intake. That might help too.
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All truths are easy to understand once they are discovered; the point is to discover them.-- Galileo Galilei
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Weezie looking at petunias 8.25.2017
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