His nature is very kind.

Detailed information is needed to understand the nature of that project.

I was moved by his sincerity.

His nature is very kind.

I take dietary supplements every day.

Gender identity refers to the gender that each individual recognizes themselves as.

The use of renewable energy helps protect the global environment.

Chemotransmitters play an important role in the transmission of information between nerve cells.

Neurotransmitters are responsible for transmitting information between nerve cells.

He is facing many difficulties due to gender identity disorder.