Rest & sleep

The Rest Stack

The sleep research set.

DSIP, a neuropeptide first studied for its link to deep sleep, with Selank, studied for calm. Small research base, plainly labeled.

$49

The 'sleep peptide,' with a question mark.

Delta sleep-inducing peptide, a nine-amino-acid peptide first isolated from rabbits in the 1970s.

What research has looked at

Studied in animals and a handful of small, older human studies for sleep and stress.

$59

A lab-made peptide studied for calm and stress.

A synthetic peptide modeled on tuftsin, a fragment of an immune protein. Developed in Russia, where it's registered as a medicine.

What research has looked at

Studied mostly in Russian clinical and animal research for anxiety and attention.