How to store peptides

We sell the box. We do not sell what goes in it, and we are not the people to ask what belongs in it. Whatever you own came with storage instructions from whoever supplied it, and those instructions win over anything on this page. What follows is about the container: what a glass vial needs from the place you keep it, and what goes wrong when it does not get it.

Cold is the instruction you already have

Almost everything in a small glass vial with a rubber stopper wants to live in a fridge. Your supplier's label will give you a range. Our job is to make that range easier to hold: a case keeps vials together so you open the fridge once instead of five times, and a cooler keeps them in range when there is no fridge to open.

No case on this site cools anything. A fridge case is organisation, not refrigeration. The cases that do hold cold do it with a frozen gel pack, a frozen ring or a plug, and each one says on its page how long it is rated for and who rated it.

Upright, always

A vial stored on its side leaves liquid sitting against the rubber stopper. Over weeks that is a problem you do not need: the stopper is designed to be punctured from above, not soaked from the inside. Standing the vial up also keeps the label readable without turning anything over, and means a slow leak past a crimp shows up on the outside of the glass instead of hiding under it.

Every case we sell holds vials upright in a cut foam slot. That is most of what the foam is for. The rest is keeping glass from touching glass.

Label it before you put it away

The most common thing that goes wrong in a fridge is not temperature. It is losing track of which vial is which and when it was opened.

• Write on the vial or the cap, not on a sticky note on the shelf.
• Date it the day you open it, not the day you bought it.
• If two vials look the same, make them not look the same.

Our vial caps snap over the stopper and give you a flat surface to write on. That is the whole product.

Glass against glass is how vials break

Loose vials in a drawer knock together every time the drawer moves, and a hairline crack in a vial is not something you will see. Foam slots stop that. So does a case that closes, which also stops a vial rolling to the back of a shelf and staying there for a month.

If you want to see how many of each size a given case holds, every product page has a slot map drawn to the real interior, and the comparison page puts them side by side.

The fridge door is the worst shelf in the fridge

The door swings into a warm room several times a day, and the things stored in it swing with it. A shelf at the back, low down, moves least. That is where a case of vials should sit.

A domestic fridge is also not a precision instrument. If you care about the number, put a small thermometer on the shelf and read it for a week before you trust it.

Keep the light off them

Direct light is not the main risk indoors, but it costs nothing to avoid. Closed cases handle it. If you want a case that blocks light on purpose, the Crate Pro has an opaque shell and a latch.

Going out with them

That is a different problem, and the answer depends entirely on how long you will be away from a fridge — an hour is not a day and a day is not a flight. The travel cooler guide works through it.

What this guide will not tell you

We do not publish anything on reconstitution, dosing, injection technique, or how long any substance stays good under any condition. Not because it is secret, but because we sell containers and have no business answering it. Ask whoever supplied or prescribed what you have.