Dosing Guide — 2026-11-12
Reta is a once-weekly compound, which makes scheduling simple — but consistency matters, since the whole protocol is built around a steady weekly rhythm. This guide lays out a clean weekly calendar, the week-by-week titration, and what to do if a dose is missed. For the full dosing detail, see the Reta dosing guide.
::shop reta-20 reta-10
Choose a fixed injection day and stick to it every week. Many researchers pick a day they're reliably home and relaxed (e.g. Sunday) so the schedule never slips.
| Action | |
| Injection day | Reta weekly dose, subcutaneous, rotate site |
| All other days | Nothing — Reta is once weekly |
The compound's long action is what makes once-weekly dosing work — there's no need to split or add mid-week doses.
Reconstitute with 1 mL (10mg) or 2 mL (20mg) → 10 units = 1 mg.
| Week | Injection-day dose | Units |
| Week 1 | 2 mg | 20 units |
| Week 2 | 3 mg | 30 units |
| Week 3 | 4 mg | 40 units |
| Week 4+ | 4 mg (hold) | 40 units |
Hold each step at least a week; don't jump ahead. Later, maintenance drops to 1–2 mg (10–20 units) weekly.
See Reta half-life and injection timing for why the weekly spacing works.
Because Reta is long-acting, a dose taken 1–2 days late is generally fine — take it when you remember, then resume your regular day the following week. If it's been close to the next scheduled dose, skip the missed one rather than doubling up. Don't stack two doses close together to "catch up."
For a gentler ramp or lower overall exposure, see the beginner dosing protocol and microdosing protocol.
Disclaimer: All information presented in this article is for educational and informational purposes only. Platinum Biolabs does not promote or endorse the use of peptides for human consumption. All products sold by Platinum Biolabs are intended strictly for laboratory and research use only. Consult a qualified healthcare professional before making any health-related decisions.