Which of the following has proven to be most reliably effective in the treatment of insomnia?

A) Antihistamine
B) Tryptophan
C) Delta-sleep-inducing peptide
D) Zolpidem

Delta-Sleep-Inducing Peptide

a naturally occurring neuropeptide that has been shown to induce sleep-like states and deepen sleep modes.

Zolpidem

A medication used primarily for the short-term treatment of sleeping problems.

Tryptophan

An essential amino acid that serves as a precursor to serotonin, a neurotransmitter important for mood regulation and sleep.