99% purity, verified
Every peptide we sell is tested by an independent lab and listed at 99% purity or higher.
About Wednesday
We sell research peptides at 99% purity
Wednesday Labs supplies research peptides to laboratories and qualified researchers. Every compound in our catalog is verified at 99% purity or higher before it is listed. Most people find us because someone they trust sent them here, and we have grown one referral and one order at a time.
How we operate
Built on a short list of rules
Reviewed before shipped
Every order is manually reviewed before fulfillment. No auto-ship, no blind processing.
Direct communication
Questions go to a real person. No ticket queues, no chatbots, no runaround.
Availability honesty
If something is out of stock, the catalog says so. We only take orders we can fill.
Wednesday Labs sells research peptides at 99% purity for laboratory research use. We answer catalog, purity and order questions directly. Protocols, clinical guidance and product-use instructions sit outside our scope.
FAQ
Questions we actually get asked
What does 99% purity mean here?
Every peptide we sell is verified at 99% purity or higher by an independent lab before it enters the catalog. Anything that comes back below that bar does not get listed.
How is Wednesday Labs different from other peptide suppliers?
We are smaller, quieter and pickier. Every peptide we sell is verified at 99% purity or higher, the catalog stays deliberately short, and the buying experience is built to respect your time. We occasionally run promotions for our community, and we work with a small group of Wednesday ambassadors who genuinely use and trust the catalog. You will not find countdown timers, urgency banners or sponsored posts here.
What happens after I place an order?
Every order is manually reviewed before anything ships. You will receive tracking once it is confirmed. If something needs attention, such as an availability change or a question about your request, we reach out directly. No automated processing, no blind fulfillment.
Why is the catalog so small?
By design. We carry what we can stand behind and keep the list short. A smaller catalog means tighter quality control, better availability tracking and fewer surprises. Anything that falls below our purity or sourcing bar gets pulled from the catalog.
What if I need something that isn't listed?
Use the custom request form. Include the compound, size, quantity, and any timing details. We'll follow up directly with availability and pricing. Most custom requests are answered within one to two business days.
What is BAC Water and do I need it?
BAC Water, short for Bacteriostatic Water, is a sterile water solution containing 0.9% benzyl alcohol, which prevents bacterial growth after the vial is opened. In a laboratory setting, BAC Water is used to reconstitute lyophilized (freeze-dried) peptide compounds, bringing them from powder form into a solution that can be measured and used in research applications. Most peptide orders will require BAC Water for reconstitution. You can add it as a standalone item or alongside any catalog listing at checkout. If you're unsure whether your order needs it, it probably does.
How should I store what I order?
Unreconstituted peptides (still in powder form) should be stored at −20°C (−4°F) in a dry, light-protected environment such as a lab freezer. They'll maintain stability for an extended period under these conditions. Once reconstituted with BAC Water, store the solution refrigerated between 2–8°C (36–46°F) and use within a reasonable research window. BAC Water itself can be stored at room temperature before opening. Short version: powder goes in the freezer, solution goes in the fridge, and keep both away from light. Avoid storage where the potential of vials being shaken is high.