Which nutrients are associated with appetite regulation?

The nutrients that play a role in appetite regulation include thiamin and zinc, making the choice of thiamin and zinc the correct answer.

Thiamin, also known as vitamin B1, is essential for carbohydrate metabolism and plays a crucial role in energy production, which indirectly influences appetite. It is involved in the regulation of neural functions and may help manage appetite through its impact on energy levels. When the body is functioning efficiently with respect to its energy needs, appetite regulation is often improved.

Zinc is known to be critical for a range of physiological functions, including taste and smell, which can significantly influence appetite. A deficiency in zinc has been linked to reduced appetite and alterations in food intake, as it affects sensory perceptions that can alter food preferences and intake behaviors. Adequate levels of zinc can help maintain a healthy appetite by supporting the body's sensory systems.

The other combinations lack the same established linkages to appetite regulation, particularly emphasizing the roles of thiamin and zinc in these processes.