NAD+ & Peptide Storage Calculator: How Long It Lasts
Pick your compound, whether it's powder or already reconstituted, and how it's stored — get the safe use-by window instantly, plus an exact use-by date for refrigerated reconstituted vials. Works for NAD+, semaglutide, tirzepatide, retatrutide, glutathione and GHK-Cu.
Use within 28 days of mixing
Reconstituted peptide refrigerated at 2–8°C keeps full potency for about 28 days. Enter your reconstitution date above to get an exact use-by date and days remaining.
Peptide & NAD+ Storage Reference
| Form & storage | Safe window | Notes |
|---|---|---|
| Powder — freezer | 24+ months | Longest shelf life; keep sealed, dark, dry. |
| Powder — fridge (2–8°C) | 18–24 months | Practical long-term default. |
| Powder — room temp (sealed) | Weeks–months | Fine for shipping; refrigerate for storage. |
| Reconstituted — fridge (2–8°C) | ~28 days | Full potency; up to ~30 days max. |
| Reconstituted — room temp | ~2 h / excursion | <24 h total out of fridge across vial life. |
| Reconstituted — freezer | Avoid | Freeze–thaw degrades reconstituted solution. |
Storing for the long term first? See how to store & reconstitute NAD+, how long NAD+ can be out of the fridge, or the BAC water reconstitution calculator.
Frequently Asked Questions
How long can NAD+ be out of the fridge?
Reconstituted NAD+ should be returned to the refrigerator (2–8°C) within about 2 hours per excursion, and total accumulated time out of the fridge should stay under roughly 24 hours across the vial’s life. Lyophilized NAD+ powder is far more tolerant — sealed, it handles cool room temperature for weeks to months, which is why it ships without ice. Use the calculator above to check your exact situation.
How long does reconstituted NAD+ last in the fridge?
Reconstituted (mixed) NAD+ keeps full potency for about 28 days when refrigerated at 2–8°C, with up to ~30 days as a practical maximum. Enter your reconstitution date in the calculator to get an exact use-by date and the number of days remaining.
How long is NAD+ good for after reconstitution?
About 28 days refrigerated at 2–8°C. Keep the vial in the body of the fridge (not the door, which fluctuates), avoid repeated warming and cooling, and do not freeze a reconstituted solution. After ~28 days, potency is no longer assured.
Does NAD+ need to be refrigerated?
Reconstituted (liquid) NAD+: yes — keep it at 2–8°C. Unopened lyophilized powder: refrigeration is best for long-term storage (18–24 months) but it is stable at cool room temperature for weeks to months and freezer storage extends it to 24+ months. The calculator gives the safe window for each combination of form and storage.
What is the shelf life of semaglutide, tirzepatide and retatrutide?
The storage math is the same for any lyophilized peptide. Reconstituted and refrigerated: about 28 days at full potency. Sealed powder: roughly 18–24 months refrigerated, 24+ months frozen. The differences between compounds are in dosing, not stability — so this calculator covers semaglutide, tirzepatide, retatrutide, NAD+, glutathione and GHK-Cu.
Can I freeze reconstituted peptides to make them last longer?
No. Freezing a reconstituted (already mixed) solution can degrade the peptide through freeze–thaw stress. Keep reconstituted vials refrigerated at 2–8°C and use within the ~28-day window. Freezing is only appropriate for unopened lyophilized powder.
I accidentally left my vial out — is it still good?
For reconstituted vials, a single excursion under ~2 hours returned promptly to the fridge is usually fine; the concern is prolonged or repeated room-temperature exposure beyond ~24 hours total. Powder is much more forgiving. Select "Accidentally left out" in the calculator for guidance, and if in doubt, reconstitute a fresh vial.
Where do I get COA-verified peptides with proper cold-chain shipping?
Prost Biotech supplies research-grade NAD+, Semaglutide, Tirzepatide, Retatrutide, Glutathione and GHK-Cu with batch-matched COA. After checking your storage window, tap "Get COA-verified … via WhatsApp" for an instant bulk quote.
Research Use Only. Storage windows are general estimates for laboratory research handling, based on commonly cited peptide stability data. All products sold by Prost Biotech are research chemicals — not for human consumption, therapeutic use, or clinical application. Always follow the certificate of analysis and consult licensed professionals.