- Jay's Protocol
Jay Campbell’s Muscle Building Protocol
Goal: Lean Muscle Growth & Hormone Support
- Protocol Overview
Compounds
6
Protocol Duration
12–16 weeks
Administration
Mixed
Best For
Men 35–65, intermediate to advanced
This protocol is for you if:
- You're already optimizing testosterone and want to build on that foundation
- You've hit a wall with training and standard supplementation
- You want to support GH output without full GH replacement
- You're focused on long-term body composition, not just a quick cut
This protocol is NOT for you if:
-
You're brand new to peptides — start with the
Reconstitution Course first - You haven't had recent bloodwork done
- You're not currently strength training consistently
The Compounds
FLGR-242
What It Does: A myostatin-inhibiting peptide designed to promote significant lean muscle growth, enhance recovery, and increase strength by targeting the biological “brake” on muscle development.
Protocol Details:
Dose
Timing
Frequency
Duration
Administration
Source
Jay’s Note: Start at 2.5mg per injection for your first cycle and assess tolerance.
Tesamorelin
What It Does: A growth hormone-releasing hormone (GHRH) analog that stimulates the pituitary to produce more GH naturally. Supports muscle growth, reduces visceral fat, and improves body composition — without shutting down your own GH axis.
Protocol Details:
Dose
Timing
Frequency
Duration
Administration
Source
Jay’s Note: Tesamorelin is my go-to for elevating GH output without the suppression risk you get from exogenous GH.
Kisspeptin
Protocol Details:
Dose
Timing
Frequency
Duration
Administration
Source
Jay’s Note: Running it before bed aligns with the body’s natural LH pulse rhythm — and you’ll feel the difference in morning testosterone and libido within the first two weeks.
Testagen
Protocol Details:
Dose
Timing
Frequency
Duration
Administration
Source
Jay’s Note: Testagen works at the tissue level — it’s not replacing your testosterone.
ShredMax
Protocol Details:
Dose
Timing
Frequency
Duration
Administration
Source
Jay’s Note: ShredMAX keeps your metabolism working in your favor while the rest of this stack is building tissue.
BioMuscle
Protocol Details:
Dose
Timing
Frequency
Duration
Administration
Source
Jay’s Note: BioMuscle is the recovery compound most men overlook.
How to Run This Protocol
01
Before You Start:
- Get bloodwork done. You need a baseline before you add anything to your system.
- Without it, you're guessing — and guessing is how people miss what's working and ignore what isn't.
02
Running the Stack:
- Follow each compound's individual cycle timing exactly as written.
- Don't compress the off-weeks and don't extend the on-weeks because you're feeling good.
- The cycle structure isn't arbitrary — it's how you maintain receptor sensitivity and keep the compounds working the way they're supposed to.
03
What to Track:
- Run follow-up bloodwork at the six-week mark and again at protocol completion.
- Track your numbers alongside how you actually feel — energy, sleep quality, recovery between sessions, and body composition changes.
04
Common Mistakes:
- Starting without a baseline. If you don't know where you started, you can't know what moved.
- Abandoning the protocol too early. Most of these compounds need four to six weeks before you feel the full effect.
- Skipping the off-weeks. The off-weeks are part of the protocol.
Frequently Asked Questions
Can I run this protocol while on TRT?
Yes — and for most men, TRT is the foundation this stack is built on top of.
Kisspeptin and Testagen are particularly useful here because they support testicular function and HPG signaling that TRT alone suppresses.
Run your TRT protocol as normal and layer these compounds on top.
Get bloodwork at the 6-week mark to confirm estradiol, IGF-1, and testosterone levels are tracking where you want them.
Do I need to cycle off?
Yes.
Follow the individual cycle guidelines for each compound.
FLGR-242 runs 12–16 weeks followed by 8 weeks off.
Tesamorelin runs 8 weeks on and 8 weeks off.
Kisspeptin runs 30 days on and 30 days off.
Your body needs the off-periods to consolidate gains and maintain receptor sensitivity.
What if I'm a peptide beginner?
If you haven’t reconstituted or injected peptides before, start with the Reconstitution Course. It covers everything you need to do this safely.
Come back to this stack once you’ve run a simpler protocol first.