Compounds studied for immune & thymic, 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.
Selank is a synthetic analog of the immune peptide tuftsin, developed in Russia (same institute and lead investigator as Semax) and approved there as a prescription anxiolytic…
Thymosin Alpha-1 (thymalfasin / Zadaxin) is a 28-amino-acid thymic immune-modulating peptide and one of the most clinically validated peptides in this register — approved in ~35…
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.
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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.