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. 2021 Sep 7;18(18):9434. doi: 10.3390/ijerph18189434

Figure 3.

Figure 3

In conditions of excessive caloric supply, leptin activates TRH expression and then synthesis of TSH and THs. It suppresses appetite and promotes energy expenditure by increasing lipolysis and thermogenesis. In obese people, leptin can activate DIO expression and can increase conversion of T4 to T3. THs play a role in the browning of adipose tissue.