Phase 1 is where most protocols die. Not from compound failure — from execution drift. Doses get rounded. Injection sites collapse onto the same patch of abdomen. The fasted window gets eaten by a 6am coffee with cream. Four weeks later the labs come back flat and the user blames the compound. The compound is fine. The rhythm broke.
This chapter locks the rhythm. Reconstitution math, site rotation, training split, fasted-window discipline, and what to actually feel by Week 2 and Week 4.
Why the fasted window is non-negotiable
GH secretagogues — CJC-1295 (no DAC) and Ipamorelin — work by stimulating the pituitary to fire its own pulsatile GH release. That pulse is glucose-sensitive. Practitioner consensus and the protocol literature are unambiguous: food within 30 minutes of injection blunts the GH pulse by 50-80 percent. Carbs and fat are the worst offenders. Insulin spikes from a meal antagonize GH secretion directly.
Translation: if you inject Ipamorelin and immediately drink a protein shake, you've paid for the peptide and gotten roughly a quarter of the pulse. The injection has to happen in a clean fasted window — 20-30 minutes minimum before the next caloric intake, and ideally longer.
This is also why pre-protocol fasting insulin matters. If your baseline fasting insulin is above 8 mIU/L, the practitioner corpus says do not start GH secretagogues at all. GH antagonizes insulin. Stacking GH on top of insulin resistance is a brake-and-gas pedal at the same time. Fix the insulin first.
The reconstitution math you'll do twice a day
The formula doesn't change. Vial size divided by water added equals concentration. Desired dose divided by concentration equals volume.
For every 5mg peptide vial reconstituted with 2mL bacteriostatic water, you get a concentration of 2,500 mcg/mL. That means:
- 250 mcg dose = 0.1 mL = 10 units on a 100-unit insulin syringe
- 500 mcg dose = 0.2 mL = 20 units
- 1,000 mcg dose = 0.4 mL = 40 units
One unit on a U-100 insulin syringe equals 0.01 mL. The whole syringe (100 units) is 1 mL. Memorize the 2mL-per-5mg ratio — it produces round syringe numbers and is the practitioner-default reconstitution for almost every compound in this stack.
For TB-500, which dosed at 5mg per shot during loading, draw the full mL volume on a 1mL insulin syringe — same gauge (29G), larger barrel for the larger volume.
After reconstitution: refrigerate immediately. 36-46°F. Never freeze. Never leave at room temperature. Use within 25-30 days. Peptides are short chains of amino acids held together by delicate bonds. Heat, freeze-thaw, and aggressive shaking physically break them. A "denatured" vial looks identical to a working one — you only find out it's dead when four weeks of injections produced nothing.
Phase 1 muscle-gain stack — execution table
| Compound | Dose | Route | Frequency | Evidence Tier | Notes |
|---|---|---|---|---|---|
| BPC-157 | 500 mcg/day | SubQ abdomen | Daily, AM | Expert | Joint/tendon protection under heavy training load. 20 units from 5mg/2mL vial. |
| CJC-1295 (no DAC) | 100 mcg | SubQ abdomen | AM fasted + pre-sleep | Expert | Sharp GH pulse mimicking natural rhythm. Co-inject with Ipamorelin in same syringe. |
| Ipamorelin | 200-300 mcg | SubQ abdomen | AM fasted + pre-sleep | Expert | GH pulse for deep recovery between high-volume sessions. |
| TB-500 (loading) | 5 mg | SubQ abdominal (deep belly fat) | Every 5th day, Weeks 1-4 | Expert | Larger volume — use 1mL insulin syringe. Tissue regeneration partner to BPC-157. |
| MK-677 | 10-25 mg | Oral | Nightly | Expert | Optional layer. [Practitioner corpus thin on optimal recomp dose — track IGF-1 and fasting glucose, report.] |
CJC-1295 and Ipamorelin are an accepted same-syringe co-injection — they're the canonical GH-pulse pair and practitioners draw them together routinely. BPC-157 and TB-500 are a synergy pair: one clears tissue debris, the other regenerates muscle fibers. But do not mix them in the same syringe unless the protocol explicitly calls for it. Same abdominal region is fine; separate draws.
Never mix BPC-157 with MK-677 (oral anyway), and never combine peptides in one syringe outside the documented pairs. TB-500 + GHK-Cu is the one other accepted same-syringe combination if you're layering connective-tissue support — but that's a chapter 9 conversation.
Injection site rotation — the clockwise pattern
Belly fat. Grab a pinch, fire it in. 29-gauge insulin needle, painless when done right.
The pattern: lower abdomen, at least 2 inches from the navel, rotating clockwise around it. Alternate left and right each injection. If you're doing twice-daily CJC/Ipamorelin plus once-daily BPC-157, you're at three abdominal injections per day during loading weeks — site discipline matters.
What rotation prevents: lipodystrophy (hardened fat tissue from repeated trauma to the same spot), bruising, localized irritation, and reduced absorption over time. A hard lump that persists after 48 hours means you hit that site too often. Move 2+ inches away and don't return for at least a week.
Avoid scar tissue entirely. Avoid the 2-inch radius around the navel (vascular). Don't inject through visible bruising. If you see redness post-injection that doesn't fade within an hour, that's either a histamine response or a repeat-site issue.
For TB-500's larger volume injection, go deeper into the belly fat — pinch a thicker section. It absorbs systemically regardless of site, so the only requirement is consistent SubQ tissue depth.
Training rhythm — Weeks 1-4
The peptide stack is creating the hormonal environment. You have to load the stimulus.
- Hypertrophy split, 4-5 days/week. Push/Pull/Legs or Upper/Lower — pick the structure you'll actually run.
- Volume in the 10-20 sets per muscle group per week range — peptide-supported recovery lets you push toward the upper end without joint accumulation.
- Heavy compounds early in the session while you're CNS-fresh. Hypertrophy work after.
- 8-12 rep range as the primary driver, with some heavy 4-6 rep work for strength carryover.
Training timing relative to injections: BPC-157 in the morning gives joint/tendon protection across the day's session. The pre-sleep GH pulse from CJC/Ipamorelin lands in deep sleep when natural GH peaks anyway — this is where the real recovery happens.
What you should feel
- Week 1: Nothing dramatic. Maybe slightly deeper sleep from the pre-sleep GH pulse. Injection-site soreness or mild redness as you find your rotation rhythm. This is normal.
- Week 2: Noticeable flexibility improvements — the BPC-157/TB-500 connective-tissue work shows up here first. Mobility in joints that used to creak. Sleep depth increasing.
- Week 3: Recovery between sessions starts compressing. You can train the same muscle group sooner without the usual lingering DOMS. Pump quality during sessions improves.
- Week 4: Significant tissue remodeling. Pain reduction in old training injuries. Strength baseline begins to lift. Scale may be flat or up 1-2 lbs — that's signal, not noise.
What's NOT happening yet
- No visible recomp at Week 4. Body composition shifts on an 8-12 week timeline, not 4. If you're looking in the mirror for changes, you're looking in the wrong place.
- No big IGF-1 jump on labs yet. Phase 1 is priming the GH axis — IGF-1 response shows up at the 6-8 week recheck, not the 4-week.
- No accelerated fat loss from the GH stack alone. GH supports partitioning; it doesn't override your nutrition. Caloric environment determines fat vs muscle direction.
- No noticeable strength explosion. Strength gains in Phase 1 are modest and recovery-driven, not the hormonal acceleration of Phase 2.
Research describes this rhythm. Track the sleep, the flexibility, the recovery — then check the labs. Adjust.