T-2 (L-diiodothyronine or 3, 5-diiodo-L-thyronine)

Drug Class: Thyroid Hormone. (Oral)
Average Reported Dosage: 150-600 MCG daily.
*Minor noted suppression of thyroid function during lower dosage short term (30-35
days) administration.

There are two well known synthetic thyroid hormones commonly administered by bodybuilders known as T-4 and T-3. (*See “Synthroid” and “Cytomel” for more info) However, some have not yet heard of another natural thyroid hormone called T-2 or Ldiiodothyronine. The good new is that it is highly active and naturally occurring in some foods such as beef products. It is also non-prescription in many countries…so far. The bad news is that since it works quite well and offers individuals freedom of choice, it probably will not be legal for long.

So far, T-2 seems to be slightly more effective for fat oxidation (burning) than either T-4 or T-3 alone while offering an improved protein sparing-like result. This may be true. T-2 stimulates cellular mitochondria (cellular energy producers) more so than the cell nucleus. This means, unlike T-4 and T-3, T-2 is less likely to activate other cellular functions and more likely to focus upon increased metabolic rate or energy expenditure. Personal experience had shown an excellent synergistic effect between T-2, Norephedrine, and ephedrine plus caffeine. This is due to an interesting interplay between the substances.

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