dip/flag

[cwervanTes378]

Are both verbs correct?
The hormone cortisol dips/flags when one person is attracted to another.

 

[Andygc]

No, but in any case the sentence makes little sense. Could you explain in other words what you are trying to say?

 

[cwervanTes378]

I want to say that the hormone declines when one person is attracted to another.

Another sentence: The children's interest in playing the game soon flagged/dipped.

 

[Florentia52]

Thank you for the clarification. In the sentence you asked about in your original post, I would probably say "The level of the hormone declines" or "Cortisol levels decline…"

"Flags" doesn't work at all. "Dips" would be accurate (if somewhat informal) if the decline were small and temporary.