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Reverse T3 yes, and I would add in Iron and Ferritin. I tend to only look at Free T3 as thats the active hormone, T4 you can make the assumption that even when reported as "low" that it is fine because it's reflected in the FT3 value. Obvious T4 production and conversion so I discount the T4 when it looks low as not being a problem, per se. But if the FT3 is pooling then you can narrow that down.