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Can I just test Free t4 only?

I am getting tested at a lab on my own and self paying. Can I get JUST free t4 done or do I also need TSH and Free t3? Whenever i tested Fre t3 I have converted well before so maybe skip ft3 and get free t4 and tsh? Want to save money.
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If I had to choose only one test it would be Free T3.  The reason being that hypothyroidism can be defined as "inadequate T3 effect in tissues throughout the body."

Symptoms are even more important as an indicator of thyroid status, since they are the result of tissue thyroid levels and effects throughout the body.   So tell us about any symptoms you are having.
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