How to store research peptides
Store lyophilised vials at −20 °C, sealed, away from light and moisture; they remain stable for a year or more. Once reconstituted, refrigerate at 2–8 °C, keep out of light and use within 8–12 weeks. Never freeze a reconstituted solution and never leave a vial at room temperature for long.
Lyophilised vials
Freeze-drying removes water, which is what makes peptides degrade. Kept cold, sealed and dark, a lyophilised vial keeps its content stable for a long time; the certificate of analysis documents the batch at the time of testing. Bring the vial to room temperature before opening so condensation does not form on the powder.
Reconstituted solution
Water restarts the chemistry. Bacteriostatic water slows microbial growth but not hydrolysis or oxidation, so the practical window is 8–12 weeks refrigerated. Peptides with cysteine or methionine oxidise faster; copper complexes like GHK-Cu are comparatively stable. Draw only what is needed and return the vial to the fridge.
Freeze-thaw
Freezing a solution forms ice crystals that can shear peptide chains and concentrate the peptide in the remaining liquid. Avoid it. If a protocol needs frozen aliquots, freeze single-use portions once and do not refreeze.
Shipping
Lyophilised peptides tolerate the short temperature range of domestic transit. Peptide Aus ships from Australian stock with same business day dispatch before 2pm AEST/AEDT, so vials spend a few days in transit rather than weeks.
Frequently asked questions
How long does a lyophilised vial last?
Twelve months or more at −20 °C. Degradation in cold storage is slow.
Can I store a reconstituted vial in the freezer?
No. Refrigerate at 2–8 °C only.
Kits
Retatrutide Starter Kit (10mg vial)
Everything for a first retatrutide vial: 10mg vial, 30 mL bacteriostatic water, syringes and swabs.
Retatrutide Starter Kit (20mg vial)
The 20mg retatrutide vial with bacteriostatic water, twenty syringes and swabs.
Retatrutide Pen Kit (15mg)
15mg premixed retatrutide pen with twenty pen needles and swabs. Nothing to mix.
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