Peptide Storage Chart: Fridge, Freezer and How Long Mixed Peptides Last

How to store BPC-157, TB-500, semaglutide, tirzepatide and 30+ other peptides before and after mixing, with label beyond-use dates where they exist and an honest "unknown" where they don't.

Most reconstituted peptides are kept in the refrigerator (2–8 °C) and used within about 28 days. That is a convention, not tested data: the 28 days comes from the USP <797> limit for opened multiple-dose containers, which is about sterility, not about whether the peptide stays intact.

Checked Oct 11, 2026.

Semaglutide

Evidence: FDA label. From the US prescribing information of the approved product. It applies to that product only.

Applies to: Ozempic pens (label). Wegovy single-dose pens: refrigerate; before the cap is removed they may be kept at 8–30 °C for up to 28 days.

  • Powder or unopened: Not a powder: ready-made pens. Before first use: refrigerator, 2–8 °C (36–46 °F). Do not freeze.
  • Mixed or in use: After first use, an Ozempic pen may be kept at 15–30 °C (59–86 °F) or in the refrigerator.
  • Use within: 56 days after mixing or first use
  • Light: Keep the pen cap on (Ozempic) or the pen in its carton (Wegovy) to protect it from light.

Compounded or "research" semaglutide vials are not covered by the label. Ask the pharmacy for its beyond-use date.

Sources: Ozempic prescribing information and Instructions for Use (DailyMed); Wegovy prescribing information (DailyMed)

Tirzepatide

Evidence: FDA label. From the US prescribing information of the approved product. It applies to that product only.

Applies to: Mounjaro and Zepbound KwikPen (label). Single-dose pens and vials may be kept unrefrigerated up to 30 °C for a total of 21 days.

  • Powder or unopened: Not a powder: ready-made pens and vials. Unused: refrigerator, 2–8 °C (36–46 °F). Do not freeze.
  • Mixed or in use: After first use a KwikPen may be kept at room temperature up to 30 °C (86 °F). Throw it away after 4 doses even if medicine is left.
  • Use within: 30 days after mixing or first use
  • Light: Keep it in the carton, away from heat and light.

Compounded or "research" tirzepatide vials are not covered by the label. Ask the pharmacy for its beyond-use date.

Sources: Mounjaro prescribing information and Instructions for Use (DailyMed); Zepbound prescribing information and Instructions for Use (DailyMed)

Tesamorelin

Evidence: FDA label. From the US prescribing information of the approved product. It applies to that product only.

Applies to: Egrifta WR 11.6 mg vial (label).

  • Powder or unopened: Room temperature, 20–25 °C (68–77 °F), excursions to 15–30 °C, in the original box. Do not freeze.
  • Mixed or in use: Keep the mixed solution at room temperature, 20–25 °C. Do not freeze.
  • Use within: 7 days after mixing or first use
  • Light: Store the vial in its original box to protect it from light.

Research tesamorelin is not Egrifta and has no tested storage data.

Sources: Egrifta WR prescribing information, rev. 3/2025 (FDA)

Bremelanotide (PT-141)

Evidence: FDA label. From the US prescribing information of the approved product. It applies to that product only.

Applies to: Vyleesi autoinjector (label).

  • Powder or unopened: Not a powder: single-use autoinjector. Store at or below 25 °C (77 °F). Do not freeze.
  • Mixed or in use: Single use: throw the autoinjector away after the injection.
  • Use within: no tested number
  • Light: Protect from light.

Vials sold as "PT-141" are not Vyleesi and have no tested storage data once mixed.

Most reconstituted peptides are kept in the refrigerator (2–8 °C) and used within about 28 days. That is a convention, not tested data: the 28 days comes from the USP <797> limit for opened multiple-dose containers, which is about sterility, not about whether the peptide stays intact.

Sources: Vyleesi prescribing information (DailyMed); Crestigen: Peptide storage and handling guide

Setmelanotide

Evidence: FDA label. From the US prescribing information of the approved product. It applies to that product only.

Applies to: Imcivree vials (label).

  • Powder or unopened: Not a powder: solution in vials. Unopened: refrigerator, 2–8 °C (36–46 °F), in the carton. Unopened vials may be kept at 2–25 °C for up to 30 days. Discard if kept above 30 °C.
  • Mixed or in use: After the vial is punctured: refrigerator or up to 25 °C (77 °F).
  • Use within: 30 days after mixing or first use
  • Light: Keep unopened vials in the original carton.

Sources: Imcivree prescribing information, rev. 3/2026 (FDA)

Retatrutide

Evidence: Common practice. What vendors and users usually do. No published stability testing supports a specific number.

  • Powder or unopened: Sealed powder: freezer (about −20 °C) for long-term storage, refrigerator for weeks. Let the vial reach room temperature before opening.
  • Mixed or in use: Refrigerator, 2–8 °C. Do not freeze and thaw repeatedly.
  • Use within: no tested number
  • Light: Keep it in the box or another dark container.

Investigational: no approved product and no label.

Most reconstituted peptides are kept in the refrigerator (2–8 °C) and used within about 28 days. That is a convention, not tested data: the 28 days comes from the USP <797> limit for opened multiple-dose containers, which is about sterility, not about whether the peptide stays intact.

Sources: Crestigen: Peptide storage and handling guide; USP General Chapter <797> Pharmaceutical Compounding: Sterile Preparations

BPC-157

Evidence: Common practice. What vendors and users usually do. No published stability testing supports a specific number.

  • Powder or unopened: Sealed powder: freezer (about −20 °C) for long-term storage, refrigerator for weeks. Let the vial reach room temperature before opening.
  • Mixed or in use: Refrigerator, 2–8 °C. Do not freeze and thaw repeatedly.
  • Use within: no tested number
  • Light: Keep it in the box or another dark container.

Most reconstituted peptides are kept in the refrigerator (2–8 °C) and used within about 28 days. That is a convention, not tested data: the 28 days comes from the USP <797> limit for opened multiple-dose containers, which is about sterility, not about whether the peptide stays intact.

Sources: Crestigen: Peptide storage and handling guide; USP General Chapter <797> Pharmaceutical Compounding: Sterile Preparations

TB-500

Evidence: Common practice. What vendors and users usually do. No published stability testing supports a specific number.

  • Powder or unopened: Sealed powder: freezer (about −20 °C) for long-term storage, refrigerator for weeks. Let the vial reach room temperature before opening.
  • Mixed or in use: Refrigerator, 2–8 °C. Do not freeze and thaw repeatedly.
  • Use within: no tested number
  • Light: Keep it in the box or another dark container.

Most reconstituted peptides are kept in the refrigerator (2–8 °C) and used within about 28 days. That is a convention, not tested data: the 28 days comes from the USP <797> limit for opened multiple-dose containers, which is about sterility, not about whether the peptide stays intact.

Sources: Crestigen: Peptide storage and handling guide; USP General Chapter <797> Pharmaceutical Compounding: Sterile Preparations

KPV

Evidence: Common practice. What vendors and users usually do. No published stability testing supports a specific number.

  • Powder or unopened: Sealed powder: freezer (about −20 °C) for long-term storage, refrigerator for weeks. Let the vial reach room temperature before opening.
  • Mixed or in use: Refrigerator, 2–8 °C. Do not freeze and thaw repeatedly.
  • Use within: no tested number
  • Light: Keep it in the box or another dark container.

Most reconstituted peptides are kept in the refrigerator (2–8 °C) and used within about 28 days. That is a convention, not tested data: the 28 days comes from the USP <797> limit for opened multiple-dose containers, which is about sterility, not about whether the peptide stays intact.

Sources: Crestigen: Peptide storage and handling guide; USP General Chapter <797> Pharmaceutical Compounding: Sterile Preparations

MOTS-c

Evidence: Common practice. What vendors and users usually do. No published stability testing supports a specific number.

  • Powder or unopened: Sealed powder: freezer (about −20 °C) for long-term storage, refrigerator for weeks. Let the vial reach room temperature before opening.
  • Mixed or in use: Refrigerator, 2–8 °C. Do not freeze and thaw repeatedly.
  • Use within: no tested number
  • Light: Keep it in the box or another dark container.

Most reconstituted peptides are kept in the refrigerator (2–8 °C) and used within about 28 days. That is a convention, not tested data: the 28 days comes from the USP <797> limit for opened multiple-dose containers, which is about sterility, not about whether the peptide stays intact.

Sources: Crestigen: Peptide storage and handling guide; USP General Chapter <797> Pharmaceutical Compounding: Sterile Preparations

Epitalon

Evidence: Common practice. What vendors and users usually do. No published stability testing supports a specific number.

  • Powder or unopened: Sealed powder: freezer (about −20 °C) for long-term storage, refrigerator for weeks. Let the vial reach room temperature before opening.
  • Mixed or in use: Refrigerator, 2–8 °C. Do not freeze and thaw repeatedly.
  • Use within: no tested number
  • Light: Keep it in the box or another dark container.

Most reconstituted peptides are kept in the refrigerator (2–8 °C) and used within about 28 days. That is a convention, not tested data: the 28 days comes from the USP <797> limit for opened multiple-dose containers, which is about sterility, not about whether the peptide stays intact.

Sources: Crestigen: Peptide storage and handling guide; USP General Chapter <797> Pharmaceutical Compounding: Sterile Preparations

Semax

Evidence: Common practice. What vendors and users usually do. No published stability testing supports a specific number.

  • Powder or unopened: Sealed powder: freezer (about −20 °C) for long-term storage, refrigerator for weeks. Let the vial reach room temperature before opening.
  • Mixed or in use: Refrigerator, 2–8 °C. Do not freeze and thaw repeatedly.
  • Use within: no tested number
  • Light: Keep it in the box or another dark container.

Often sold as a nasal spray; storage depends on the product.

Most reconstituted peptides are kept in the refrigerator (2–8 °C) and used within about 28 days. That is a convention, not tested data: the 28 days comes from the USP <797> limit for opened multiple-dose containers, which is about sterility, not about whether the peptide stays intact.

Sources: Crestigen: Peptide storage and handling guide; USP General Chapter <797> Pharmaceutical Compounding: Sterile Preparations

Selank

Evidence: Common practice. What vendors and users usually do. No published stability testing supports a specific number.

  • Powder or unopened: Sealed powder: freezer (about −20 °C) for long-term storage, refrigerator for weeks. Let the vial reach room temperature before opening.
  • Mixed or in use: Refrigerator, 2–8 °C. Do not freeze and thaw repeatedly.
  • Use within: no tested number
  • Light: Keep it in the box or another dark container.

Often sold as a nasal spray; storage depends on the product.

Most reconstituted peptides are kept in the refrigerator (2–8 °C) and used within about 28 days. That is a convention, not tested data: the 28 days comes from the USP <797> limit for opened multiple-dose containers, which is about sterility, not about whether the peptide stays intact.

Sources: Crestigen: Peptide storage and handling guide; USP General Chapter <797> Pharmaceutical Compounding: Sterile Preparations

DSIP (emideltide)

Evidence: Common practice. What vendors and users usually do. No published stability testing supports a specific number.

  • Powder or unopened: Sealed powder: freezer (about −20 °C) for long-term storage, refrigerator for weeks. Let the vial reach room temperature before opening.
  • Mixed or in use: Refrigerator, 2–8 °C. Do not freeze and thaw repeatedly.
  • Use within: no tested number
  • Light: Keep it in the box or another dark container.

Most reconstituted peptides are kept in the refrigerator (2–8 °C) and used within about 28 days. That is a convention, not tested data: the 28 days comes from the USP <797> limit for opened multiple-dose containers, which is about sterility, not about whether the peptide stays intact.

Sources: Crestigen: Peptide storage and handling guide; USP General Chapter <797> Pharmaceutical Compounding: Sterile Preparations

LL-37

Evidence: Common practice. What vendors and users usually do. No published stability testing supports a specific number.

  • Powder or unopened: Sealed powder: freezer (about −20 °C) for long-term storage, refrigerator for weeks. Let the vial reach room temperature before opening.
  • Mixed or in use: Refrigerator, 2–8 °C. Do not freeze and thaw repeatedly.
  • Use within: no tested number
  • Light: Keep it in the box or another dark container.

Most reconstituted peptides are kept in the refrigerator (2–8 °C) and used within about 28 days. That is a convention, not tested data: the 28 days comes from the USP <797> limit for opened multiple-dose containers, which is about sterility, not about whether the peptide stays intact.

Sources: Crestigen: Peptide storage and handling guide; USP General Chapter <797> Pharmaceutical Compounding: Sterile Preparations

Dihexa

Evidence: Common practice. What vendors and users usually do. No published stability testing supports a specific number.

  • Powder or unopened: Sealed powder: freezer (about −20 °C) for long-term storage, refrigerator for weeks. Let the vial reach room temperature before opening.
  • Mixed or in use: Refrigerator, 2–8 °C. Do not freeze and thaw repeatedly.
  • Use within: no tested number
  • Light: Keep it in the box or another dark container.

Often taken by mouth; no injectable stability data found.

Most reconstituted peptides are kept in the refrigerator (2–8 °C) and used within about 28 days. That is a convention, not tested data: the 28 days comes from the USP <797> limit for opened multiple-dose containers, which is about sterility, not about whether the peptide stays intact.

Sources: Crestigen: Peptide storage and handling guide; USP General Chapter <797> Pharmaceutical Compounding: Sterile Preparations

GHK-Cu

Evidence: Common practice. What vendors and users usually do. No published stability testing supports a specific number.

  • Powder or unopened: Sealed powder: freezer (about −20 °C) for long-term storage, refrigerator for weeks. Let the vial reach room temperature before opening.
  • Mixed or in use: Refrigerator, 2–8 °C. Do not freeze and thaw repeatedly.
  • Use within: no tested number
  • Light: Keep it in the box or another dark container.

Most reconstituted peptides are kept in the refrigerator (2–8 °C) and used within about 28 days. That is a convention, not tested data: the 28 days comes from the USP <797> limit for opened multiple-dose containers, which is about sterility, not about whether the peptide stays intact.

Sources: Crestigen: Peptide storage and handling guide; USP General Chapter <797> Pharmaceutical Compounding: Sterile Preparations

PEG-MGF

Evidence: Common practice. What vendors and users usually do. No published stability testing supports a specific number.

  • Powder or unopened: Sealed powder: freezer (about −20 °C) for long-term storage, refrigerator for weeks. Let the vial reach room temperature before opening.
  • Mixed or in use: Refrigerator, 2–8 °C. Do not freeze and thaw repeatedly.
  • Use within: no tested number
  • Light: Keep it in the box or another dark container.

Most reconstituted peptides are kept in the refrigerator (2–8 °C) and used within about 28 days. That is a convention, not tested data: the 28 days comes from the USP <797> limit for opened multiple-dose containers, which is about sterility, not about whether the peptide stays intact.

Sources: Crestigen: Peptide storage and handling guide; USP General Chapter <797> Pharmaceutical Compounding: Sterile Preparations

MGF

Evidence: Common practice. What vendors and users usually do. No published stability testing supports a specific number.

  • Powder or unopened: Sealed powder: freezer (about −20 °C) for long-term storage, refrigerator for weeks. Let the vial reach room temperature before opening.
  • Mixed or in use: Refrigerator, 2–8 °C. Do not freeze and thaw repeatedly.
  • Use within: no tested number
  • Light: Keep it in the box or another dark container.

Most reconstituted peptides are kept in the refrigerator (2–8 °C) and used within about 28 days. That is a convention, not tested data: the 28 days comes from the USP <797> limit for opened multiple-dose containers, which is about sterility, not about whether the peptide stays intact.

Sources: Crestigen: Peptide storage and handling guide; USP General Chapter <797> Pharmaceutical Compounding: Sterile Preparations

Melanotan II

Evidence: Common practice. What vendors and users usually do. No published stability testing supports a specific number.

  • Powder or unopened: Sealed powder: freezer (about −20 °C) for long-term storage, refrigerator for weeks. Let the vial reach room temperature before opening.
  • Mixed or in use: Refrigerator, 2–8 °C. Do not freeze and thaw repeatedly.
  • Use within: no tested number
  • Light: Keep it in the box or another dark container.

Most reconstituted peptides are kept in the refrigerator (2–8 °C) and used within about 28 days. That is a convention, not tested data: the 28 days comes from the USP <797> limit for opened multiple-dose containers, which is about sterility, not about whether the peptide stays intact.

Sources: Crestigen: Peptide storage and handling guide; USP General Chapter <797> Pharmaceutical Compounding: Sterile Preparations

Ipamorelin

Evidence: Common practice. What vendors and users usually do. No published stability testing supports a specific number.

  • Powder or unopened: Sealed powder: freezer (about −20 °C) for long-term storage, refrigerator for weeks. Let the vial reach room temperature before opening.
  • Mixed or in use: Refrigerator, 2–8 °C. Do not freeze and thaw repeatedly.
  • Use within: no tested number
  • Light: Keep it in the box or another dark container.

Most reconstituted peptides are kept in the refrigerator (2–8 °C) and used within about 28 days. That is a convention, not tested data: the 28 days comes from the USP <797> limit for opened multiple-dose containers, which is about sterility, not about whether the peptide stays intact.

Sources: Crestigen: Peptide storage and handling guide; USP General Chapter <797> Pharmaceutical Compounding: Sterile Preparations

GHRP-2

Evidence: Common practice. What vendors and users usually do. No published stability testing supports a specific number.

  • Powder or unopened: Sealed powder: freezer (about −20 °C) for long-term storage, refrigerator for weeks. Let the vial reach room temperature before opening.
  • Mixed or in use: Refrigerator, 2–8 °C. Do not freeze and thaw repeatedly.
  • Use within: no tested number
  • Light: Keep it in the box or another dark container.

Most reconstituted peptides are kept in the refrigerator (2–8 °C) and used within about 28 days. That is a convention, not tested data: the 28 days comes from the USP <797> limit for opened multiple-dose containers, which is about sterility, not about whether the peptide stays intact.

Sources: Crestigen: Peptide storage and handling guide; USP General Chapter <797> Pharmaceutical Compounding: Sterile Preparations

GHRP-6

Evidence: Common practice. What vendors and users usually do. No published stability testing supports a specific number.

  • Powder or unopened: Sealed powder: freezer (about −20 °C) for long-term storage, refrigerator for weeks. Let the vial reach room temperature before opening.
  • Mixed or in use: Refrigerator, 2–8 °C. Do not freeze and thaw repeatedly.
  • Use within: no tested number
  • Light: Keep it in the box or another dark container.

Most reconstituted peptides are kept in the refrigerator (2–8 °C) and used within about 28 days. That is a convention, not tested data: the 28 days comes from the USP <797> limit for opened multiple-dose containers, which is about sterility, not about whether the peptide stays intact.

Sources: Crestigen: Peptide storage and handling guide; USP General Chapter <797> Pharmaceutical Compounding: Sterile Preparations

Hexarelin

Evidence: Common practice. What vendors and users usually do. No published stability testing supports a specific number.

  • Powder or unopened: Sealed powder: freezer (about −20 °C) for long-term storage, refrigerator for weeks. Let the vial reach room temperature before opening.
  • Mixed or in use: Refrigerator, 2–8 °C. Do not freeze and thaw repeatedly.
  • Use within: no tested number
  • Light: Keep it in the box or another dark container.

Most reconstituted peptides are kept in the refrigerator (2–8 °C) and used within about 28 days. That is a convention, not tested data: the 28 days comes from the USP <797> limit for opened multiple-dose containers, which is about sterility, not about whether the peptide stays intact.

Sources: Crestigen: Peptide storage and handling guide; USP General Chapter <797> Pharmaceutical Compounding: Sterile Preparations

CJC-1295

Evidence: Common practice. What vendors and users usually do. No published stability testing supports a specific number.

  • Powder or unopened: Sealed powder: freezer (about −20 °C) for long-term storage, refrigerator for weeks. Let the vial reach room temperature before opening.
  • Mixed or in use: Refrigerator, 2–8 °C. Do not freeze and thaw repeatedly.
  • Use within: no tested number
  • Light: Keep it in the box or another dark container.

Most reconstituted peptides are kept in the refrigerator (2–8 °C) and used within about 28 days. That is a convention, not tested data: the 28 days comes from the USP <797> limit for opened multiple-dose containers, which is about sterility, not about whether the peptide stays intact.

Sources: Crestigen: Peptide storage and handling guide; USP General Chapter <797> Pharmaceutical Compounding: Sterile Preparations

Sermorelin

Evidence: Common practice. What vendors and users usually do. No published stability testing supports a specific number.

  • Powder or unopened: Sealed powder: freezer (about −20 °C) for long-term storage, refrigerator for weeks. Let the vial reach room temperature before opening.
  • Mixed or in use: Refrigerator, 2–8 °C. Do not freeze and thaw repeatedly.
  • Use within: no tested number
  • Light: Keep it in the box or another dark container.

The former US product (Geref) is no longer marketed, so there is no current label.

Most reconstituted peptides are kept in the refrigerator (2–8 °C) and used within about 28 days. That is a convention, not tested data: the 28 days comes from the USP <797> limit for opened multiple-dose containers, which is about sterility, not about whether the peptide stays intact.

Sources: Crestigen: Peptide storage and handling guide; USP General Chapter <797> Pharmaceutical Compounding: Sterile Preparations

AOD-9604

Evidence: Common practice. What vendors and users usually do. No published stability testing supports a specific number.

  • Powder or unopened: Sealed powder: freezer (about −20 °C) for long-term storage, refrigerator for weeks. Let the vial reach room temperature before opening.
  • Mixed or in use: Refrigerator, 2–8 °C. Do not freeze and thaw repeatedly.
  • Use within: no tested number
  • Light: Keep it in the box or another dark container.

Most reconstituted peptides are kept in the refrigerator (2–8 °C) and used within about 28 days. That is a convention, not tested data: the 28 days comes from the USP <797> limit for opened multiple-dose containers, which is about sterility, not about whether the peptide stays intact.

Sources: Crestigen: Peptide storage and handling guide; USP General Chapter <797> Pharmaceutical Compounding: Sterile Preparations

IGF-1 LR3

Evidence: Common practice. What vendors and users usually do. No published stability testing supports a specific number.

  • Powder or unopened: Sealed powder: freezer (about −20 °C) for long-term storage, refrigerator for weeks. Let the vial reach room temperature before opening.
  • Mixed or in use: Refrigerator, 2–8 °C. Do not freeze and thaw repeatedly.
  • Use within: no tested number
  • Light: Keep it in the box or another dark container.

Most reconstituted peptides are kept in the refrigerator (2–8 °C) and used within about 28 days. That is a convention, not tested data: the 28 days comes from the USP <797> limit for opened multiple-dose containers, which is about sterility, not about whether the peptide stays intact.

Sources: Crestigen: Peptide storage and handling guide; USP General Chapter <797> Pharmaceutical Compounding: Sterile Preparations

Thymosin alpha-1

Evidence: Common practice. What vendors and users usually do. No published stability testing supports a specific number.

  • Powder or unopened: Sealed powder: freezer (about −20 °C) for long-term storage, refrigerator for weeks. Let the vial reach room temperature before opening.
  • Mixed or in use: Refrigerator, 2–8 °C. Do not freeze and thaw repeatedly.
  • Use within: no tested number
  • Light: Keep it in the box or another dark container.

Approved outside the US as Zadaxin; we did not find that label to check its storage rules.

Most reconstituted peptides are kept in the refrigerator (2–8 °C) and used within about 28 days. That is a convention, not tested data: the 28 days comes from the USP <797> limit for opened multiple-dose containers, which is about sterility, not about whether the peptide stays intact.

Sources: Crestigen: Peptide storage and handling guide; USP General Chapter <797> Pharmaceutical Compounding: Sterile Preparations

SS-31

Evidence: Common practice. What vendors and users usually do. No published stability testing supports a specific number.

  • Powder or unopened: Sealed powder: freezer (about −20 °C) for long-term storage, refrigerator for weeks. Let the vial reach room temperature before opening.
  • Mixed or in use: Refrigerator, 2–8 °C. Do not freeze and thaw repeatedly.
  • Use within: no tested number
  • Light: Keep it in the box or another dark container.

Most reconstituted peptides are kept in the refrigerator (2–8 °C) and used within about 28 days. That is a convention, not tested data: the 28 days comes from the USP <797> limit for opened multiple-dose containers, which is about sterility, not about whether the peptide stays intact.

Sources: Crestigen: Peptide storage and handling guide; USP General Chapter <797> Pharmaceutical Compounding: Sterile Preparations

Kisspeptin-10

Evidence: Common practice. What vendors and users usually do. No published stability testing supports a specific number.

  • Powder or unopened: Sealed powder: freezer (about −20 °C) for long-term storage, refrigerator for weeks. Let the vial reach room temperature before opening.
  • Mixed or in use: Refrigerator, 2–8 °C. Do not freeze and thaw repeatedly.
  • Use within: no tested number
  • Light: Keep it in the box or another dark container.

Most reconstituted peptides are kept in the refrigerator (2–8 °C) and used within about 28 days. That is a convention, not tested data: the 28 days comes from the USP <797> limit for opened multiple-dose containers, which is about sterility, not about whether the peptide stays intact.

Sources: Crestigen: Peptide storage and handling guide; USP General Chapter <797> Pharmaceutical Compounding: Sterile Preparations

Ibutamoren (MK-677)

Evidence: Unknown. We found no usable data.

  • Powder or unopened: Usually sold as capsules or an oral liquid, not a powder to mix. Follow the product label.
  • Mixed or in use: Not reconstituted.
  • Use within: no tested number
  • Light: Unknown.

Most reconstituted peptides are kept in the refrigerator (2–8 °C) and used within about 28 days. That is a convention, not tested data: the 28 days comes from the USP <797> limit for opened multiple-dose containers, which is about sterility, not about whether the peptide stays intact.

NAD+

Evidence: Common practice. What vendors and users usually do. No published stability testing supports a specific number.

  • Powder or unopened: Not a peptide. Vendors usually say to refrigerate the powder.
  • Mixed or in use: Refrigerator. No tested beyond-use data found.
  • Use within: no tested number
  • Light: Keep it away from light.

Most reconstituted peptides are kept in the refrigerator (2–8 °C) and used within about 28 days. That is a convention, not tested data: the 28 days comes from the USP <797> limit for opened multiple-dose containers, which is about sterility, not about whether the peptide stays intact.

Sources: USP General Chapter <797> Pharmaceutical Compounding: Sterile Preparations

5-Amino-1MQ

Evidence: Unknown. We found no usable data.

  • Powder or unopened: Not a peptide; usually sold as capsules. No published storage data.
  • Mixed or in use: Not usually reconstituted.
  • Use within: no tested number
  • Light: Unknown.

Most reconstituted peptides are kept in the refrigerator (2–8 °C) and used within about 28 days. That is a convention, not tested data: the 28 days comes from the USP <797> limit for opened multiple-dose containers, which is about sterility, not about whether the peptide stays intact.

Crestigen is an educational research reference. Nothing here is medical advice; many of these compounds are not approved for human use. Talk to a licensed clinician before using any substance.