Tren isn't just about T3. it suppresses your entire thyroid function (as does all AAS) which would mean how much T4 is made by the thyroid. If your T3 is low then that means your thyroid is suppressed to the point where your not making enough T4 to be converted to an adequate amount of T3. OR, you may be making enough T4 but the natural conversion isnt happening. If you supplement with T3 you will further halt any natural production of T4 and conversion to T3. T3 alone is not the answer for a lagging thyroid. That is old school bro science. If you want to support your thyroid while its being hammered by AAS then you need T4 so your own body can perform the conversion to T3. Unless of course through blood work you see that the conversion rate isn't enough then you need a cocktail of both if you are interested in being healthy. In which case actual real dessicated thyroid hormone is the only real answer.
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