Mitochondrial genes that were significantly regulated by T1 and/or T3, in HCFs, when compared to controls: A) UCP1 was significantly higher with T1 when compared to control and T3. T3 was significantly higher compared to control; B) UCP 3 was significantly higher with T1 compared to control. All samples were repeated at least three times, with p<0.05 considered to be statistically significant ($$$p<0.0001, $$p<0.001, $p<0.01, ***p<0.0005, **p<0.005, *p<0.05).