Source comparison
Comparison of Common Peptide Diluents
While bacteriostatic water is our top recommendation for most research peptides, it's helpful to understand the other options and why they may or may not be suitable. The choice of diluent directly impacts the stability and shelf life of your reconstituted com
This comparison does not assign a generated winner or score.
- While bacteriostatic water is our top recommendation for most research peptides, it's helpful to understand the other options and why they may or may not be suitable. The choice of diluent directly impacts the stability and shelf life of your reconstituted compound.
- Bacteriostatic Water
- Sterile Water + 0.9% Benzyl Alcohol
- Most peptides for multi-use vials (Melanotan 2, BPC-157, etc.)
- ~4 to 6 weeks
- The gold standard. The benzyl alcohol is highly effective at preventing contamination over repeated uses.
- Sterile Water
- Sterile Water only
- Single-use applications or peptides sensitive to benzyl alcohol (rare).
- ~24 to 48 hours
- Not recommended for multi-use vials. The risk of bacterial contamination after the first puncture is too high.
- 0.6% Acetic Acid
- Acetic Acid + Sterile Water
- Specific peptides that require an acidic pH for solubility and stability.
- Varies by peptide
- Use only when specified. Required for compounds like IGF-1 LR3, but damaging to others.