Welcome to KOI
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• ≥99% purity target • Third-party tested • COA per batch • Fast US shipping
Home / Contact
The fastest path to an answer is usually the phone. Our team is staffed by people who have actually run peptide synthesis — technical questions get technical answers.
How to reach us
Follow on social
Lab updates, new product drops, and chemistry posts.
Mailing address
Koi Research Labs LLC
30 N Gould St Ste R
Sheridan, WY 82801
United States
All correspondence, legal notices, and returns paperwork.
Send a message
If it's a quote request, include the sequence/SKU, scale, and any deadline. We'll reply within one business day.
Direct routing
If you already know which department you need, these inboxes are monitored by the people who can actually answer.
Registered office
Koi Research Labs LLC
30 N Gould St Ste R
Sheridan, WY 82801
United States
Hours of operation
Monday – Friday
8:00 AM – 6:00 PM Central Time
Closed weekends and US federal holidays
Lab & shipping
Same-day shipping cutoff: 2:00 PM ET, Mon–Fri.
Cold-chain shipments dispatched Mon/Tue only to avoid weekend transit.
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Create an AccountWelcome to KOI
Join our researcher list and we'll email your code right away.
• ≥99% purity target • Third-party tested • COA per batch • Fast US shipping