RP226 (listed as BR226 in the reference guide) is a pre-mixed 10 mL relaxation solution built from GABA, melatonin, arginine and glutamine. The appeal is consolidation: four separate sleep and relaxation inputs in a single ready solution instead of four preparations. The guide is also straight about the open question, noting that injectable GABA as a workaround for its poor blood-brain-barrier penetration is still debated.
- Four relaxation inputs (GABA, melatonin, arginine, glutamine) arrive pre-blended in one ready solution.Complete Peptide Guide p.22
- GABA is an inhibitory neurotransmitter, and the guide is candid that injectable delivery as a bypass for its poor blood-brain-barrier penetration remains debated.Complete Peptide Guide p.22
- Arginine is the heaviest component at 100 mg/mL, while melatonin sits low at 0.1 mg/mL.Complete Peptide Guide p.22
- The guide reports rapid onset of drowsiness, with deeper subjective sleep emerging over consistent use.Complete Peptide Guide p.22
- It is stacked with DSIP for sleep-architecture support, GHK-Cu for overnight repair, and MOTS-c on off days.Complete Peptide Guide p.22