Core Peptide Terms
Lyophilized: Freeze-dried peptide powder that requires reconstitution with bacteriostatic water before use. This process preserves peptides for long-term storage and maintains potency. Most research peptides arrive in lyophilized form.
SubQ (Subcutaneous): Injection method where peptides are administered into the fatty tissue layer between skin and muscle. This route provides consistent absorption and is the most common administration method for research peptides.
BAC Water (Bacteriostatic Water): Sterile water containing 0.9% benzyl alcohol that prevents bacterial growth. This is the standard reconstitution solution for most peptides, allowing multi-dose use over several weeks when refrigerated.
Dosing and Timing Terms
mcg vs mg: Microgram (mcg) is 1/1000th of a milligram (mg). Many peptides use mcg dosing, so precision is critical. Always double-check units to avoid dangerous dosing errors.
Half-life: The time it takes for peptide concentration to reduce by half in your system. This determines dosing frequency. Short half-life peptides like Ipamorelin require multiple daily doses, while long half-life compounds like CJC-1295 with DAC need only weekly administration.
Research Protocol Terms
Cycle: A defined period of peptide administration followed by a rest period. Typical cycles range from 4-12 weeks depending on the compound.
Bioavailability: The percentage of administered peptide that reaches systemic circulation. Subcutaneous injection typically offers 80-100% bioavailability compared to lower rates for oral administration.
This terminology guide is for research purposes only and does not constitute medical advice. Proper understanding of these terms is essential for safe research protocols.