Clavicular Stack
The Clavicular Stack is a five-layer peptide protocol built around one triple-agonist core and four supporting compounds — Retatrutide for −28.7% body fat, BPC-157 for gut and tissue repair, GHK-Cu and SNAP-8 for skin, and CJC-1295/Ipamorelin for lean mass. Every compound in the Clavicular Stack is documented with its dose, its mechanism and the trial it comes from, and sourced research-grade.
Shop by Category
Seven Maxxing Shelves
GLP-1, dual and triple receptor agonists, plus the non-GLP metabolic modulators.
GHRH analogs, GHRP secretagogues and IGF-1 axis compounds for body-comp research.
Tissue-repair peptides — BPC-157, TB-500 and the angiogenic healing class.
Collagen, melanogenesis and expression-wrinkle targets, topical and systemic.
Telomerase-active peptides, sirtuin cofactors and epigenetic bioregulators.
Selank, Semax and Cerebrolysin-class peptides for CNS research.
The St. Petersburg bioregulator library — short peptides for organ-specific signaling.
GLP-3 R — Retatrutide
The engine of the stack. Hits all three receptors — the glucagon agonism is what separates it from tirzepatide. Phase 2 showed −28.7% at 48 weeks. The fat loss core.
BPC-157 — Gut Guardrail
GLP-1 agonists hit the gut hard. BPC-157 keeps it intact. 36+ preclinical studies, no minimum toxic dose found. The guardrail on an aggressive Retatrutide protocol.
GHK-CU — The GLOW Peptide
Upregulates 4,000+ skin biology genes. Collagen synthesis, VEGF angiogenesis, Cu-SOD antioxidant defense. When you lose 28% body weight, GHK-CU makes the skin show it well.
SNAP-8 — The KLOW Peptide
SNAP-25 N-terminal analog. Partially inhibits ACh at the NMJ — reducing expression muscle contraction force. Preclinical models: up to 63% wrinkle depth reduction.
CJC-1295 / Ipamorelin — Lean Mass
Pulsatile GH secretagogue combo. Preserves lean mass during aggressive Retatrutide fat loss. No cortisol elevation. Optional layer for those training hard.
The Protocol
What the
Clavicular Stack
actually is.
The Clavicular Stack is five compounds run together, each doing a job the others cannot. At the centre is Retatrutide, a triple agonist hitting GLP-1, GIP and the glucagon receptor at once — the third of those raises hepatic energy expenditure directly, which is why its Phase 2 readout landed at −28.7% at the high dose over 48 weeks against −20.9% for a dual agonist and −14.9% for a single.
The other four exist because aggressive fat loss costs you things. BPC-157 covers gut and connective tissue while intake is low. CJC-1295 with Ipamorelin works the growth hormone axis so the weight coming off is fat rather than lean mass. GHK-Cu and SNAP-8 handle the skin and collagen side, which is the part people notice first and plan for last.
What makes it a stack rather than a list is the sequencing and the dose ratios between the layers. Run the core alone and you lose weight badly; run all five without the ratios and you are just spending more. Every compound documented here carries the dose it is run at and the trial that dose comes from.
Weight Loss Comparison
The Official Protocol. The Only Stack.
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Every compound in Clavicular's protocol in one place. HPLC verified, research grade, ships from the US.