CJC-1295 DAC Reconstitution: A Step-by-Step Guide

CJC-1295 DAC reconstitution means dissolving the freeze-dried peptide powder in bacteriostatic water so it can be drawn and measured as a liquid. The standard research method is to add 1–2 mL of bacteriostatic water to a 2 mg vial, swirl the vial gently — never shake it — and refrigerate it right away. CJC-1295 with DAC is not FDA-approved for human use in the United States, so the information below is educational reference only.

Why CJC-1295 DAC Ships as a Powder

CJC-1295 is a growth hormone–releasing hormone (GHRH) analog. The "DAC" stands for Drug Affinity Complex, a maleimide linker that lets the peptide bind to serum albumin in the bloodstream. That binding is the reason CJC-1295 with DAC has a half-life measured in days instead of minutes.

Lyophilized powder is far more stable than liquid. A sealed powder vial tolerates shipping and room-temperature storage for weeks, while a reconstituted vial begins degrading the moment water touches it. Reconstitution is simply the step that turns that powder back into a measurable solution.

Supplies You Need Before You Start

• CJC-1295 DAC vial (commonly 2 mg of lyophilized powder)
• Bacteriostatic water with 0.9% benzyl alcohol
• Alcohol swabs, one per stopper per session
• Insulin or low-dead-space syringes with 29–31 gauge needles
• Sharps container and nitrile gloves

The best bac water for peptides contains 0.9% benzyl alcohol, a preservative that allows multiple punctures of the same vial with less contamination risk. Plain sterile water also works as a diluent, but because it has no preservative, a vial mixed with it should be used within roughly 24 hours.

Sourcing is often the hardest part. Many people search for bacteriostatic water walgreens, but most large US pharmacy chains treat sterile water for injection as a prescription or special-order item, so lab supply vendors are the more common route.

Step-by-Step CJC-1295 DAC Reconstitution

1. Let the powder vial and the diluent sit at room temperature for about 20 minutes.
2. Wipe the rubber stoppers on both vials with a fresh alcohol swab and let them air dry.
3. Draw your chosen volume of bacteriostatic water into a syringe — 1 mL or 2 mL per 2 mg vial are the two most common choices.
4. Insert the needle at a slight angle so the stream hits the glass wall rather than the powder cake.
5. Let the water run down the side slowly. Aiming directly at the powder can foam the peptide and reduce yield.
6. Swirl the vial gently between your palms until the powder dissolves completely. Do not shake.
7. Inspect the solution. It should be clear and colorless; cloudiness or visible particles mean discarding it.
8. Label the vial with the reconstitution date and concentration, then refrigerate it.

Reconstitution Math: Concentration per Unit

Concentration depends entirely on how much diluent you add, not on the amount of peptide in the vial. A 2 mg vial contains 2,000 mcg, so 1 mL of water gives 2,000 mcg/mL while 2 mL gives 1,000 mcg/mL.

Vial size	Diluent added	Concentration	Peptide per 10 units (U-100)
2 mg	1 mL	2,000 mcg/mL	200 mcg
2 mg	2 mL	1,000 mcg/mL	100 mcg
5 mg	1 mL	5,000 mcg/mL	500 mcg
5 mg	2.5 mL	2,000 mcg/mL	200 mcg

More diluent means a larger injection volume for the same amount of peptide, which usually makes fine adjustments easier to measure. Less diluent means smaller shots but less precision on the syringe.

Storage, Stability, and Shelf Life

Reconstituted CJC-1295 DAC belongs in the refrigerator at 2–8 °C, away from light. Do not freeze a mixed vial, because freeze–thaw cycles can cause the peptide to aggregate. Unmixed powder can be kept in the freezer for long-term storage or at room temperature for shorter periods.

If you are wondering how long is bac water good for in the fridge, most manufacturers say 28 days after the first puncture, and the same window generally applies to the mixed peptide vial.

How CJC-1295 DAC Compares to Other Options

Protocol design usually comes down to half-life and to burst-versus-steady blood levels. Many researchers compare cjc-1295 with dac vs ipamorelin because the two behave very differently: DAC produces a long, flat elevation, while ipamorelin produces a short pulse.

Peptide	Approximate half-life	Typical research rhythm	Reconstitution notes
CJC-1295 with DAC	6–8 days	Weekly or twice weekly	1–2 mL bac water per 2 mg
CJC-1295 without DAC	About 30 minutes	1–3 times daily	Same method, smaller doses
Ipamorelin	About 2 hours	2–3 times daily	1–2 mL bac water per 2–5 mg

People who want faster peaks and more frequent administration sometimes choose the version without the DAC linker instead. In research settings, cjc 1295 dac cycle length typically runs 8 to 12 weeks, followed by a break before any repeat.

Safety, Legal Status, and Common Mistakes

CJC-1295 DAC is not approved by the FDA for human use, and it is not a dietary supplement. Products sold online are labeled for laboratory research only, and no regulator verifies their purity or identity.

• Shaking the vial, which foams the peptide and can denature it
• Reusing needles or swabbing only one stopper
• Storing a mixed vial at room temperature for days
• Confusing milligrams with micrograms in the concentration math
• Assuming a "research use only" label means a product has been tested or is safe

Anyone considering peptide use for personal health reasons should talk with a licensed healthcare professional first, especially if they take prescription medications or have an endocrine condition.

COMMON QUESTIONS

Frequently Asked Questions

How much bacteriostatic water should I add to a 2 mg CJC-1295 DAC vial?

Most researchers add either 1 mL or 2 mL of bacteriostatic water to a 2 mg vial. With 1 mL the concentration is 2,000 mcg/mL; with 2 mL it is 1,000 mcg/mL. The total peptide in the vial does not change — only the volume you draw per dose changes.

Does reconstituted CJC-1295 DAC need to be refrigerated?

Yes. Once mixed, CJC-1295 DAC should be stored at 2–8 °C, protected from light, and never frozen. Most sources recommend using a reconstituted vial within about 28 days of the first puncture.

Can I use sterile water instead of bacteriostatic water for CJC-1295 DAC?

You can, but sterile water contains no preservative, so a vial mixed with it should be used within roughly 24 hours. Bacteriostatic water contains 0.9% benzyl alcohol, which allows repeated draws from the same vial over a longer period.