well...
check this out.
Thyroid article by BigAndy69
Increase Nutrient Uptake: Not very well known, but this is a great use for T3. Doses between 6.25-12.5mcg do not shutdown endogenous thyroid output. T3 at this dose can be used to add LBM and help in keeping the fat off. When doses are kept at 6.25-12.5mcg, muscles are full and rock hard, and energy is through the roof. At these light doses, it’s common for people to go to the bathroom 5-6 times a day because there bodies are making more efficient use of the food they eat.
Now I think this is true, but someone from another board is disputing it. Saying thyroid never increases energy.
It should be noted that these sorts of dosage increase protein syntheis, and thus anabolism.
Chris