Made in California
Synthesized, tested, and filled within the United States.
Free 2-Day Shipping on Orders Over $200
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Selank is a synthetic analog of a naturally occurring tuftsin peptide, researched for the signalling tied to stress response and attention. A naturally derived sequence, concentrated for research.
Free 2-Day Shipping Over $200
Order by 10:00 AM PT, Monday–Friday, and your order ships the same business day.
Orders placed after 10:00 AM PT or on weekends ship the following business day. Delivery is via UPS 2nd Day Air or a comparable 2-day expedited service.
We stand behind every published specification.
Every Vivo product is represented by a batch-specific Certificate of Analysis (COA), giving researchers a clear and verifiable standard for what is inside each vial. Our 200% Guarantee is our commitment to standing behind that standard.
If qualifying independent testing determines that a sealed Vivo vial does not conform to the published specification for its lot, we’ll pay 200% of the eligible product amount paid for the affected order.
This guarantee is about measurable product integrity—not personal satisfaction, effectiveness, or a particular research outcome. It exists to give researchers greater confidence that the identity and quality we publish are the identity and quality we deliver.
Limits apply.
The Cold Guarantee
Chilled within the hour it clears lot release. Never sits warm on a bench.
A temperature-logged 2–8 °C room, not a consumer fridge, logged around the clock.
Packed into insulated, phase-change coolers minutes before pickup, not hours.
Held or rerouted when forecasts spike. We’d rather delay a day than ruin a vial.
Synthesized, tested, and filled within the United States.
Verified by independent HPLC and LC-MS. No fillers, no salts, just the peptide.
Automated synthesis pipelines ensure uniform molecular sequences across all production runs.
The Research
Selank, a synthetic analog of the peptide tuftsin, has been studied for its anxiolytic profile and its modulation of GABAergic and monoaminergic signalling.
Read the full researchSources
Vivo requires a minimum purity of 99%. If a production lot does not meet that threshold, we do not release it. Every lot undergoes independent third-party verification before release, including identity confirmation, purity analysis, potency quantification, and endotoxin testing.
A CoA is a verified report from an independent laboratory documenting the material in one specific production lot. Start with the lot number, then review the identity, purity, potency, and endotoxin results. The report also lists the analytical methods and the laboratory responsible for verification.
Every Vivo peptide is synthesized, tested, and filled in California, and each released lot is tied to its own batch-specific Certificate of Analysis.
Store unopened vials in a cool, dry place, protected from direct light, heat, and moisture. Refrigeration is not required while the product remains lyophilized. After reconstitution, keep vials refrigerated.
Orders placed before 10:00 a.m. Pacific Time on business days are dispatched the same day via UPS 2nd Day Air or a comparable 2-day expedited service. Shipping is complimentary on orders over $200. Lyophilized products do not require refrigeration in transit, but we cold-pack every order as an added measure against heat and humidity.
