Most people reconstitute GLOW with 2mL BAC water to get a 25mg/mL GHK-Cu concentration, then inject 0.1–0.2mL (2.5–5mg GHK-Cu equivalent) subcutaneously 3x per week. That's the short answer. Everything you need — exact volumes, injection technique, cycle length, and protocol comparisons — is below.
Key Takeaways
- Reconstitute with 2mL BAC water for easy dosing
- Standard dose: 0.1–0.2mL per injection (20–40 IU on a U-100 syringe)
- Frequency: 3x per week (e.g., Mon/Wed/Fri)
- Cycle length: 8–12 weeks, then 4 weeks off
- One vial lasts ~11 weeks at the standard 0.1mL 3x/week protocol
- Always inject subcutaneously — not intramuscularly
- Free calculator: Reconstitution Calculator
GLOW Vial Contents & Concentrations
Each GLOW vial contains 70mg of lyophilized (freeze-dried) peptides:
- GHK-Cu: 50mg — the primary skin and collagen peptide
- BPC-157: 10mg — accelerates healing and tissue repair
- TB-500: 10mg — promotes recovery and reduces inflammation
The concentration you get depends entirely on how much bacteriostatic water you add. Here's how the math breaks down:
| BAC Water Added | GHK-Cu Conc. | BPC-157 Conc. | TB-500 Conc. | 0.1mL dose = |
|---|---|---|---|---|
| 1mL | 50mg/mL | 10mg/mL | 10mg/mL | 5mg GHK-Cu / 1mg BPC / 1mg TB |
| 2mL ⭐ Recommended | 25mg/mL | 5mg/mL | 5mg/mL | 2.5mg GHK-Cu / 0.5mg BPC / 0.5mg TB |
| 3mL | 16.7mg/mL | 3.3mg/mL | 3.3mg/mL | 1.67mg GHK-Cu / 0.33mg BPC / 0.33mg TB |
2mL is the sweet spot — comfortable injection volume, easy math, and keeps each component in the effective range. You're not injecting a tiny 0.04mL dose or a large 0.5mL one. It just works.
Standard GLOW Dosage Protocols
Protocol 1 — Skin & Anti-Aging Focus (Most Common)
- Reconstitution: 2mL BAC water
- Dose per injection: 0.1mL (20 IU on U-100 syringe) = 2.5mg GHK-Cu + 0.5mg BPC-157 + 0.5mg TB-500
- Frequency: 3x per week (Mon/Wed/Fri)
- Duration: 8–12 weeks
- Vial lasts: ~33 injections = ~11 weeks at 3x/week
- Best for: Skin anti-aging, collagen improvement, general radiance
This is where most people start and stay. The 0.1mL dose at 2mL reconstitution puts 2.5mg of GHK-Cu in your system per injection — enough to drive meaningful skin and collagen changes over a full cycle without burning through your vial quickly.
Protocol 2 — Accelerated Skin + Recovery (Higher Dose)
- Reconstitution: 2mL BAC water
- Dose per injection: 0.2mL (40 IU) = 5mg GHK-Cu + 1mg BPC-157 + 1mg TB-500
- Frequency: 3x per week
- Duration: 6–8 weeks
- Vial lasts: ~16 injections = ~5 weeks at 3x/week
- Best for: Post-procedure recovery (laser, microneedling), injury healing alongside skin goals
If you've just had a laser treatment, microneedling session, or you're dealing with an injury and want GLOW working on both fronts simultaneously, double the dose. BPC-157 and TB-500 at 1mg each per injection is an effective healing dose. Just know your vial will be gone in about 5 weeks.
Protocol 3 — Daily Micro-Dosing
- Reconstitution: 3mL BAC water
- Dose per injection: 0.1mL (20 IU) = 1.67mg GHK-Cu + 0.33mg BPC-157 + 0.33mg TB-500
- Frequency: Daily (7x per week)
- Duration: ~4–5 weeks per vial
- Best for: People who prefer consistent daily low-dose over larger less frequent doses
Some people just like daily habits. The doses are lower per injection, but your system gets a steady daily supply rather than three larger pulses per week. Total weekly peptide load is actually higher than Protocol 1, but spread across 7 injections instead of 3.
Protocol Comparison
| Protocol | Dose/Injection | Frequency | Vial Duration | Best For |
|---|---|---|---|---|
| Skin/Anti-Aging | 0.1mL | 3x/week | ~11 weeks | General anti-aging |
| Accelerated | 0.2mL | 3x/week | ~5 weeks | Post-procedure, injury |
| Daily Micro-dose | 0.1mL (3mL recon) | Daily | ~4–5 weeks | Consistent daily habit |
How to Reconstitute GLOW
This is where people make mistakes. Reconstitution is straightforward, but the technique matters — especially that last bit about not jetting water directly onto the powder.
- Allow the vial to reach room temperature — 15–20 minutes out of the fridge before you touch it
- Wipe the rubber stopper with an alcohol swab, let it dry 10 seconds
- Draw your BAC water volume (2mL recommended) into a drawing syringe
- Insert the needle at an angle and slowly inject the BAC water down the inside wall of the vial — do not jet it directly onto the powder
- Gently swirl (do NOT shake) until fully dissolved — takes 1–3 minutes
- Solution should be clear or very slightly off-white — if it's cloudy or has particles, discard it
- Label the vial with the date, concentration, and 28-day expiry
- Refrigerate immediately
Use the Reconstitution Calculator if you want exact volumes for different target doses — it does the math automatically.
How to Inject GLOW
Injection Sites (Subcutaneous Only)
- Abdomen: 2 inches from the navel — most common, easiest pinch, highest consistency
- Outer thigh: Good rotation alternative, easy to reach
- Upper arm (back): Less convenient but usable for variety
Technique
- Pinch 1–2 inches of skin between your fingers
- Insert a 29–31 gauge insulin needle at a 45–90 degree angle
- Inject slowly and steadily over 5–10 seconds
- Remove the needle and apply light pressure with a cotton swab — don't rub
- Rotate sites each injection — never inject the same spot twice in a row
Injection Timing
GLOW doesn't have strict timing requirements. Unlike GH peptides (CJC/Ipamorelin) that work best fasted, GLOW can be injected morning, evening, or post-workout — it doesn't matter much. Pick a consistent time on your injection days and stick to it for habit-building. If you're doing 3x/week, space them evenly: Mon/Wed/Fri or Tue/Thu/Sat both work.
Subcutaneous only. Do not inject intramuscularly. IM injection of these peptides can cause unnecessary local reactions and is not needed for the intended effects. SubQ is correct.
GLOW Dosage for Specific Goals
| Goal | Protocol | Notes |
|---|---|---|
| Skin anti-aging / collagen | Protocol 1 (0.1mL 3x/week) | Minimum 8 weeks for meaningful results |
| Post-procedure recovery | Protocol 2 (0.2mL 3x/week) | Start 24h after procedure |
| Hair + skin combination | Protocol 1 + topical GHK-Cu | Inject systemically + apply topical GHK-Cu serum to scalp separately |
| Injury recovery + skin | Protocol 2 (0.2mL 3x/week) | BPC-157 and TB-500 at 1mg each per injection covers both goals |
| Maintenance after cycle | Protocol 1 at 2x/week | Drop to twice weekly after your initial 8–12 week cycle |
Cycle Length & When to Take a Break
The standard approach is 8–12 weeks on, followed by 4–6 weeks off. Here's the reasoning:
- Standard cycle: 8–12 weeks on
- Break: 4–6 weeks off
- Why cycle? GHK-Cu receptor sensitivity may reduce with continuous long-term use. Taking a break helps maintain your response when you restart.
- After your break: Restart at the same dose or slightly lower
- Long-term users: Many run 8 weeks on / 4 weeks off indefinitely with good results
There's no known harm from running longer cycles. Cycling is a precaution to preserve sensitivity, not a strict safety requirement. If you're in the middle of a recovery situation (post-procedure, active injury), you can run it through without a break — just plan your off-period afterwards.
What Not to Do — Common Dosing Mistakes
- ❌ Shaking the vial — mechanical agitation degrades peptide structure. Always swirl gently.
- ❌ Using regular water instead of BAC water — no preservative means it only stays viable for ~24 hours. Always use bacteriostatic water.
- ❌ Skipping site rotation — injecting the same spot repeatedly causes lumps, scar tissue buildup, and reduced absorption over time.
- ❌ Expecting results in week 1 — GHK-Cu collagen effects take 3–6 weeks to show. Skin structure doesn't change overnight.
- ❌ Injecting intramuscularly — subcutaneous is correct for this blend. IM is unnecessary and more likely to cause local irritation.
- ❌ Leaving the reconstituted vial at room temperature — refrigerate promptly after each use. Use within 28 days of reconstitution.
Stacking GLOW With Other Peptides
GLOW plays well with most other compounds. A few common combinations:
- GLOW + Retatrutide/Semaglutide: No interactions. GLP-1s handle weight and metabolic function; GLOW handles skin quality and recovery. They work on completely different mechanisms.
- GLOW + CJC-1295/Ipamorelin: A popular stack. GH peptides improve overall tissue quality and body composition. GLOW adds targeted skin repair and healing on top. Inject them at separate times — GH peptides work best in a fasted state; GLOW has no such requirement.
- GLOW + standalone GHK-Cu topical: Use injectable GLOW for systemic effects and a topical GHK-Cu serum on your scalp for hair. The mechanisms are different — systemic vs. local — so they genuinely complement each other.
- GLOW + KLOW: Generally redundant. KLOW contains the same base formula plus KPV. If you want KPV in the mix, just use KLOW instead of running both.
Frequently Asked Questions
How much GLOW peptide should I take?
Standard dose is 0.1–0.2mL per injection with 2mL reconstitution — that's 2.5–5mg of GHK-Cu equivalent per dose. 3 injections per week is the most common protocol. Start at 0.1mL and increase to 0.2mL if you want faster results or are using it for post-procedure recovery.
How many times a week should I inject GLOW?
3x per week (Mon/Wed/Fri) is the standard. It gives your body regular peptide exposure while spacing injections evenly. Daily micro-dosing also works for people who prefer consistency over larger, less frequent doses.
How long does one GLOW vial last?
At 0.1mL 3x/week: approximately 11 weeks. At 0.2mL 3x/week: approximately 5 weeks. Daily micro-dosing (0.1mL with 3mL recon): approximately 4–5 weeks.
How do I reconstitute the GLOW blend?
Add 2mL of bacteriostatic water slowly down the inside wall of the vial, then gently swirl until the solution is clear. Do not shake. Label the vial with the date and refrigerate immediately. Full reconstitution guide: GLOW Peptide Blend Review.
Can I inject GLOW daily?
Yes. Reconstitute with 3mL of BAC water instead of 2mL, then take 0.1mL daily. This gives you a lower per-injection dose spread over 4–5 weeks of daily injections. Some people find daily dosing easier to build into a routine.
Where do I inject GLOW?
Subcutaneous injection only — abdomen (2 inches from the navel), outer thigh, or upper arm. The abdomen is easiest for most people. Rotate sites with each injection to avoid building up scar tissue.
How long before I see results from GLOW?
First subtle effects (improved skin feel, faster healing) typically show up around weeks 2–3. Visible collagen and texture improvements appear at weeks 4–6. Full structural skin improvements — the kind you can photograph — develop over an 8–12 week cycle. Patience is the non-negotiable part of this protocol.
Can I use GLOW peptide with other peptides?
Yes — GLOW stacks well with GLP-1 peptides (Semaglutide, Retatrutide), GH peptides (CJC-1295/Ipamorelin), and most other compounds. The one combination to avoid is GLOW + KLOW, since they share the same base formula and stacking them is redundant.
The information in this article is for educational purposes only and does not constitute medical advice. Always consult a healthcare professional before starting any new supplement or compound. Results vary by individual.