Compounds studied for sleep & circadian, ranked by the strength of the evidence — strongest at the top, research-grade and disappointing below. Grades reflect the evidence, not marketing. This is a neutral reference; nothing here is a recommendation to use, and no compound is offered for sale.
MK-677 (ibutamoren) is an oral, non-peptide ghrelin-receptor agonist — the pill version of the injectable GHRPs.
DSIP (regulatory name Emideltide) is a naturally occurring nonapeptide named for its ability to promote delta (deep-sleep) EEG in rabbits.
Epitalon is a synthetic tetrapeptide (AEDG) from Russian pineal-peptide research, heavily promoted for telomerase activation and longevity.
Ranking is by evidence grade (A–F), the same ceiling shown on each compound page — not by popularity or margin. No dosing, reconstitution, or administration is given anywhere on Vallydia. See each entry for its full evidence table and legal status by region.
A neutral reference and a lawful-lane shop. Registered in Spain. Information for those who seek it — never promotion.
This site provides neutral scientific reference and sells only products lawful in your region. Nothing here is medical advice, a recommendation, or an offer to supply unapproved medicines. No dosing or administration is published for research compounds. Cosmetic peptides per Regulation (EC) 1223/2009. Unapproved injectable peptides are neither sold nor advertised in the EU (Directive 2001/83/EC, Title VIII). © 2026 Vallydia SL — Registered in Spain.