How to store peptides.
Dry powder: cool, dry, dark. Mixed with water: in the fridge at 2 to 8°C, use within 30 days.
2 to 8°C
keep it in the fridge
Day 1
good for 30 days
toss
A mixed vial lasts 30 days in the fridge. After that, the water can no longer keep germs out. Throw it away and mix a fresh one.
Storing peptides right is easy, but people get it wrong a lot. And it really does change how well a works.
Two words first
A starts as dry powder in a small glass bottle called a vial. Once you mix it with water, it is called reconstituted, or just mixed. The rules are different for dry and for mixed.
Dry powder, still sealed
Keep it below 25°C (a bit cooler than a warm room). Leave it in its first package. Keep it out of sunlight. The maker's sheet usually says dry powder stays good for 12 to 24 months from the day it was made. If you bought a lot at once, keep it in the fridge (2 to 8°C) so it lasts even longer.
Mixed vials
Put them in the fridge at 2 to 8°C right after you mix them. Use them within 30 days. After 30 days, the special water () can no longer keep germs out. Even if the itself is still fine, germs can start to grow in it. So toss it at 30 days.
Freezing a mixed vial
Most peptides can take being frozen and thawed one time. But freezing and thawing again and again breaks the . If you want to keep a vial longer than 30 days, split it into a few small syringes or vials first. Splitting it up like this is called making an aliquot. Then each time you thaw just one small part, not the whole thing.
What kills peptides:
- heat (over 25°C for a long time)
- light (sunlight is the worst)
- freezing and thawing over and over
- shaking
- air getting in while you mix
When in doubt, throw it out
A $40 vial is not worth getting an infection from old, dirty water. Just buy a new one.
Mixing it: How to reconstitute. Checking it is real: How to read a COA.
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