GLP-1S — sold at Rapid Research CO as our GLP-1S compound — arrives as a lyophilized (freeze-dried) white powder. Before use in any in-vitro laboratory protocol, it must be reconstituted with a sterile solvent. This guide walks through the complete process.
What You'll Need
- Lyophilized GLP-1S vial (GLP-1S — 5mg, 10mg, or 15mg)
- Bacteriostatic water (BAC water) — USP grade, 0.9% benzyl alcohol
- 1mL or 3mL syringe with a fine-gauge needle
- Alcohol prep swabs
- Lab gloves and appropriate PPE
Step 1: Calculate Your Target Concentration
Decide on your working concentration before you add any solvent. Common laboratory concentrations:
| Vial Size | BAC Water Volume | Concentration |
|---|---|---|
| 5mg | 2.5mL | 2mg/mL |
| 5mg | 5.0mL | 1mg/mL |
| 10mg | 5.0mL | 2mg/mL |
| 10mg | 10.0mL | 1mg/mL |
A 1mg/mL concentration is the most common starting point as it simplifies subsequent dilution math in most research protocols.
Step 2: Prepare Your Workspace
Work in a clean environment. Wipe down your work surface with 70% isopropyl alcohol. Put on gloves. Clean the rubber septa of both the BAC water vial and the peptide vial using an alcohol swab and allow to air-dry for 30 seconds before piercing.
Step 3: Draw the BAC Water
Using your syringe, draw the calculated volume of bacteriostatic water. Ensure no air bubbles are trapped in the syringe barrel — tap the syringe and expel any bubbles before proceeding.
Step 4: Inject Slowly Into the Peptide Vial
Insert the needle through the rubber septum of the GLP-1S vial at an angle so the BAC water runs down the inside wall of the glass — not directly onto the powder. Inject slowly. This minimizes mechanical stress and reduces the chance of foaming.
Step 5: Gently Swirl to Mix
After adding all the BAC water, do not shake the vial. Roll it gently between your palms or swirl in a slow circular motion until the powder is fully dissolved. The solution should be clear and colorless. If cloudiness persists after 2–3 minutes of gentle swirling, discard and use a fresh vial.
Step 6: Storage After Reconstitution
Store the reconstituted GLP-1S at 4°C (refrigerator temperature) in a sealed vial with the septum intact. Keep away from light. The bacteriostatic agent provides multi-use stability for up to 28 days. Label the vial with the date of reconstitution, concentration, and lot number.
Related Research Compounds
Researchers studying GLP-1 receptor agonism often compare GLP-1S against dual- and triple-agonist compounds:
- GLP-2T — GLP-1 / GIP dual agonist
- GLP-3R (Retatrutide) — GLP-1 / GIP / GCG triple agonist
- BAC Water — USP grade bacteriostatic water for reconstitution