Frosty questions, straight answers

Lyophilization is freeze-drying: the peptide solution is frozen and the water is removed under vacuum, leaving a dry powder "cake" at the bottom of the vial. That dry form is how labs usually receive and store peptides. Every peptide we sell arrives this way.

Keep sealed vials cool, dry and out of direct light, and follow your lab's own storage procedures. We don't publish shelf-life figures and don't give handling or preparation instructions for personal use.

Our supplier's specification is ≥99% purity with each vial filled to within ±10% of its label, and each lot is guaranteed sterile and endotoxin-free. We don't post certificates of analysis yet. Send your own vial to Janoshik, Freedom Diagnostics or Vanguard Laboratory. One vial never vouches for the next.

Lyophilized material is light and often settles in ways that are easy to miss. Depending on how the lot froze and dried, the cake may be a compact pellet, a faint frost-like coating spread across the inner glass, or loose flakes scattered by handling in transit. A vial that looks almost bare is expected.

Inspect it against a dark background under good light. The amount of peptide is set by the fill specification on the label, not by how big the cake looks.

Both designs protect a butyl rubber stopper that is crimped onto the vial by an aluminum overseal. Lab practice is to keep that stopper seated and undisturbed. It's the closure that keeps the vial sealed and guards the contents against contamination.

With a standard flip-off, only the plastic disc comes away and the crimp remains intact. With a FOTO seal, the plastic tab is attached to a scored aluminum band. Researchers usually peel the band partially or cut it so that a metal collar remains around the neck. Removing the band completely is acceptable too, provided the stopper itself stays firmly in position.

No. Cap colors are a visual sorting aid for the lab shelf, nothing more. A dual GIP/GLP-1 agonist vial is the same material under a pink cap as under a white one, and the same holds for every GLP-1 or other peptide in the catalog. Identity is confirmed by the printed label and lot information, never by the color of the flip-off top. Think of it like a snowman's scarf: it changes the look, not what's underneath.

Gentle motion is preferred. Standard lab handling calls for slow swirling or rolling of the vial rather than vigorous shaking, which introduces foaming and mechanical stress that may degrade or aggregate the peptide. Letting the vial rest briefly so the cake can wet through, then swirling again, is a common bench technique. Patience beats a blizzard in a bottle.

The distinction comes down to one ingredient. Bacteriostatic water contains 0.9% benzyl alcohol, a preservative that inhibits microbial growth, so a vial may be entered repeatedly and is labeled for multiple use. Sterile water contains no preservative and is intended for a single entry; any remainder is discarded.

This is provided as reference information only. We don't advise on which diluent a given protocol should use.

Yes, guaranteed. Each lot is sterile and free of bacterial endotoxins, then sealed beneath a crimped stopper so it stays that way until your lab opens it. Supplied for laboratory research only.

They can. Delivery outside the US is a flat $40 per order, and US orders always ship free. Orders usually ship within 24 hours, and every package comes with tracking. Your country’s import and customs rules, and any duties, are your responsibility. More: Worldwide delivery.

Orders ship via USPS Priority Mail, usually within 24 hours, with tracking provided. You can follow the sled all the way to your door.

You'll get one email when payment is confirmed and another with a tracking number when the package leaves.

We accept credit and debit cards, bank payments, Venmo, Cash App, Bitcoin and Monero, all at the same price. For Venmo or Cash App, put your Snowman order number (it starts with SR-) in the payment note so we can match it to your order. Bitcoin and Monero orders get their own payment address, and the invoice stays open for 72 hours.

No. Everything is sold for laboratory research only, not for human or veterinary use, not FDA-approved, and not for diagnosing, treating, curing or preventing anything. Full details are on the research-use page.

Adults 21 and older buying research materials for laboratory work.

Short chains of amino acids made for laboratory study rather than for medical use. On this site, "research peptide" means a compound sold as research material only.

Yes: tap Chat with a human ☃️ (bottom-left) or email [email protected]. Replying to any order email works too.

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