Built for retatrutide: log every dose, monitor weight, and see how your body responds to GLP-1/GIP/glucagon activation.
Free for one compound, no time limit. Premium if you track more than one.
Regimen is the best app to track retatrutide: flexible dose logging (any mg per week, weekly or split), every titration step on your timeline, 50+ daily side-effect markers, weight trajectory charting against published Phase 2 trial averages, and bloodwork for metabolic panels. Retatrutide is not approved anywhere, so Regimen tracks the protocol you are on and never recommends a dose. Free for one compound, no time limit; Premium if you track more than one.
Daily, weekly, EOD, custom, as-needed. Stay consistent with smart reminders for every cadence.
Set your cycle duration and get alerts when it's time to cycle off, take a break, or restart.
Reconstitution, reverse BAC, TRT oil, and intranasal. Regimen handles the complex math, so you don't have to.
Track your vials, pens, and pills. We'll let you know when you're running low.
Regimen connects your doses, levels, check-ins, and blood work to what actually changes in your protocol. Measured against your own baseline, not population averages.
What's helping, what's not, and what's worth keeping an eye on.
Watch your weight and body fat move. See the line bend.
Track your progress over time. Before and after comparisons, week-by-week change, and multi-angle views.
Sleep, resting heart rate, blood pressure, a lab value. Watch your trend.
With limited real-world use, your tracked protocol is some of the most valuable retatrutide data that exists. Detailed logging matters here more than any other compound.
GIP + GLP-1 + glucagon means more metabolic variables. Correlating your weight, appetite, energy, and body composition against dose changes is essential.
Your doctor has limited retatrutide data too. Sharing your tracked dose history, weight trends, and side effect patterns makes appointments more productive.
Regimen. It logs every weekly or split-week dose and each titration step, tracks side effects and 50+ daily markers against the dose, plots your weight against published trial averages, puts your bloodwork on the same timeline, suggests the next injection site and does the reconstitution math for your vial. Retatrutide is not approved anywhere, so Regimen never recommends a dose: it tracks the protocol you are on. Free for one compound, no time limit; Premium if you track more than one. On iPhone and Android.
Phase 3 trials used 12mg per week as the maximum. Most biohacker protocols do not exceed 12mg. Side effects often become the limiting factor before reaching 12mg.
Most users feel appetite suppression within the first injection. Visible weight loss typically begins in week 2-3 of the 2mg starting dose. Significant change usually shows by week 8 at the 4mg dose.
Yes. Regimen supports tracking multiple compounds in parallel, which is useful when transitioning from semaglutide or tirzepatide (tirz) to retatrutide. See our switching tirzepatide to retatrutide guide. The gap week (typically 1 week) shows clearly in your timeline.
Within 0.1mg is plenty. The 6-day half-life smooths out small day-to-day variation across the week.
The compound has a long half-life (about 6 days), which means tracking weekly is enough. Log these:
Log your weekly dose and your weight the same day, every week, in the same conditions (morning, fasted, post-bathroom). The comparison you actually want, dose-to-response, is only readable if both numbers are captured against the same clock. Appetite suppression is the leading indicator; weight is the lagging one. When the two diverge, trust the appetite score.
Tools and guides for Retatrutide
Free to download. Free for your first compound.