Is Zyrna Research the same company as nashpeps.com?
Yes. The store launched as nashpeps.com in July 2026 and was renamed Zyrna Research in August 2026. The old domain redirects here, and nothing about the products, the supplier or the handling changed with the name. People sometimes search for "Zyrna peptides"; this is that site.
Where is Zyrna Research based, and where do orders ship from?
Nashville, Tennessee. Every order is packed and posted from Nashville, Monday to Friday.
Are these products for human use?
No. Everything on the site is supplied strictly for laboratory research. Nothing is a drug, supplement, cosmetic or medical device, nothing is approved for human or veterinary use, and nothing may be introduced into humans or animals. Ordering confirms you are 21 or older and a researcher.
Do you provide dosing guidance?
No. The product pages describe what a compound has been studied for in published research, cite those papers, and give laboratory handling and storage notes. None of that is dosing guidance and we do not give any by email either.
Who tests the products?
Our manufacturer does, and where a lot in stock has been sent to an independent laboratory, that laboratory does. We are a supplier, not an analytical laboratory: we do not run HPLC, mass spectrometry, sterility or endotoxin assays ourselves and we do not publish figures we have not been given. Every third-party report we hold is on the certificates page with its verification key.
What does the purity figure on a certificate mean?
The area of the main HPLC peak as a percentage of all peaks: how clean the peptide is relative to other peptides. It says nothing about how much of the powder is peptide by weight, which is a separate figure called net peptide content. The certificate guide explains both.
How much is shipping?
A flat $10 anywhere in the United States, any order size, and free on orders of $250 or more. We ship to all fifty states and do not ship internationally.
How long does delivery take?
Paid orders are handed to the carrier on the next business day. Typical domestic transit is two to four business days. A tracking number is emailed automatically when the parcel is marked shipped.
Does it need to ship cold?
No. Lyophilised peptides are shelf-stable in transit, which is the reason they are freeze-dried. Orders travel at room temperature without ice packs. Put unopened vials in a −20°C freezer on arrival and keep anything reconstituted in the refrigerator.
What is the returns policy?
Opened or unsealed vials cannot be returned, because their storage cannot be verified once they leave our control. Sealed, unopened vials can be returned within 14 days for store credit less return shipping. A vial damaged in transit is replaced at no cost if you photograph the parcel and vials and email us within 72 hours of delivery. A wrong item is our error and is replaced at our expense. Lost parcels are claimed with the carrier and reshipped once the claim is opened.
How do I pay?
By card through an encrypted checkout. Card details never touch our servers. Orders are not packed until payment clears.
How do promotion and referral codes work?
A promotion code is entered in the code box at checkout and takes a fixed percentage off. A referral code is different: it tells us where an order came from and can be typed at checkout or carried in a link such as zyrnaresearch.com/?ref=CODE. It does not change the price.
Which compounds are in stock?
The catalog page lists every group with an in-stock count, and each product page shows live availability per size. Sold-out sizes are marked and cannot be added to the cart. Where a restock has a known arrival date, the page shows it and takes preorders that ship the day the stock lands.
How should I store a vial?
Unopened lyophilised vials at −20°C, protected from light; they are stable for years that way. Reconstituted solutions at 2–8°C, in the dark, used within the window on the storage guide. Each product page carries stability notes derived from its own sequence.
What diluent should I use?
Bacteriostatic water for a vial that will be sampled more than once, sterile water for single use. Both are covered on the bacteriostatic vs sterile water guide, and the reconstitution calculator does the concentration arithmetic.
How do I contact you?
Email orders@zyrnaresearch.com. Replies to any order or tracking email reach the same inbox.
Not answered here?
The guides go deeper on certificates, storage, reconstitution and how each group of compounds compares. For anything else, email orders@zyrnaresearch.com.