Feel Better Guide — Retatrutide 30 mg
Retatrutide (RT) · 30 mg vial · mixed with 2 mL BAC water
Informational only — not medical advice. I'm not a doctor, just a girl sharing what's helped me and the people I care about.
Quick Facts
| Vial | 30 mg |
| Mix with | 2 mL BAC water |
| How often | Once weekly |
| Best known for | The strongest appetite + fat-loss peptide in research |
What Is It?
Retatrutide — "RT" — is a triple-agonist peptide (GLP-1 + GIP + Glucagon). Where Semaglutide works one pathway and Tirzepatide works two, Reta works three — which is why it's significantly stronger than either and shows the highest weight-loss efficacy of any peptide currently in clinical research.
Heads up on this vial size: the 30 mg vial is 1.5× as concentrated as the 20 mg — the same dose takes about a third fewer units. Double-check your chart when switching vial sizes.
Who May Benefit?
- People whose progress stalled on Semaglutide or Tirzepatide
- Anyone wanting strong appetite and food-noise control
- People focused on visceral (deep belly) fat and metabolic health
Benefits
- Strong appetite suppression
- Major visceral fat reduction
- Enhanced metabolic rate
- Improved insulin sensitivity
- Very potent compared to Semaglutide/Tirzepatide
How It Works
Reta activates the GLP-1, GIP, and glucagon receptors at once — appetite quiets, blood sugar steadies, and your metabolic rate gets a nudge instead of the slowdown that often comes with weight loss.
What to Expect
Strong appetite suppression — often more than TZ. That's the power and the caution: it's easy to accidentally under-eat. Titrate slowly, eat your protein, and expect results to build over the weeks.
💛 T's Tip
Reta is the strongest one in the toolbox, babe — respect it. Start at the bottom of the chart and stay there longer than feels necessary. The appetite suppression can be so strong that people forget to eat, and under-fueling is how you end up feeling awful and losing muscle instead of fat. Protein first, water always, and check in with me as you climb. Low and slow wins this one more than any other. 💛 — T
Mixing
Add 2 mL BAC water to the 30 mg vial — that's two full insulin syringes (each syringe = 1 mL = 100 units) of BAC water. Run it gently down the side, swirl (don't shake) until clear, and refrigerate.
At this mix, 1 unit = 0.15 mg, so 1 mg ≈ 6.7 units. The unit numbers land between the tick marks on this vial size — round to the nearest whole unit and use the chart below rather than doing the math in your head.
Dosing (not medical advice)
Once weekly, clinical-trial-based titration (units for the 30 mg / 2 mL mix):
| Weeks | Dose | Units |
|---|---|---|
| 1–4 | 1 mg weekly | ~7 units |
| 5–8 | 2–4 mg weekly | 13–27 units |
| 9–12 | 4–6 mg weekly | 27–40 units |
| 13–16 | 8 mg weekly | 53 units |
| 17+ (maintenance) | 8–12 mg weekly | 53–80 units |
Only step up when the current dose is well tolerated — and only if appetite control fades.
Full conversion chart:
| Dose | Units | Dose | Units | |
|---|---|---|---|---|
| 1 mg | ~7 | 7 mg | 47 | |
| 2 mg | 13 | 8 mg | 53 | |
| 3 mg | 20 | 9 mg | 60 | |
| 4 mg | 27 | 10 mg | 67 | |
| 5 mg | 33 | 11 mg | 73 | |
| 6 mg | 40 | 12 mg | 80 |
How Long Will One Vial Last?
One 30 mg vial, at weekly dosing:
| Weekly dose | One vial lasts |
|---|---|
| 1 mg | ~30 weeks |
| 2 mg | ~15 weeks |
| 4 mg | ~7 weeks |
| 6 mg | ~5 weeks |
| 8 mg | ~3.5 weeks |
| 12 mg | ~2.5 weeks |
At the higher doses, the 50 mg or 100 mg vial is usually the better value.
Side Effects
- Nausea
- Full/stuffy stomach sensation
- Fatigue (especially during titration)
- Loose stools or constipation
- Mild increase in heart rate
Reach out for anything severe or persistent.
Storage
Refrigerate the reconstituted vial (36–46°F / 2–8°C). Swab the stopper each time, use a fresh sterile syringe, keep out of light.
Helpful Tips
- Protein first — the suppression makes under-eating easy
- Hydrate + electrolytes every day
- Switching from the 20 mg vial? Your units drop by about a third for the same dose — re-check the chart
- Go slow on the titration; hold a dose if you feel rough
- Same day each week
FAQ
Can I combine this with my other peptides? Using more than one peptide is common and perfectly fine — but different peptides should not be combined in the same syringe. A few technically can be mixed, but they don't always play well together, and in some cases they can work against each other, so you lose the benefit of both. It isn't worth the guesswork. Keep each peptide in its own syringe — you can still take them in the same sitting, one right after another. When in doubt, keep them separate.
Why are my units different than my last vial? Different vial strength, same peptide. The 30 mg vial is more concentrated than the 20 mg, so the same mg dose is fewer units. Always match your chart to your vial.
My dose doesn't land on a whole unit. What do I do? That's normal on this mix — round to the nearest unit on the chart. A fraction of a unit either way is not a meaningful difference in dose.
How does Reta compare to Tirzepatide? It adds a third pathway (glucagon), so most people find it stronger per mg — that's why the doses are lower and the titration slower.
I'm not hungry at all. Is that good? It means it's working — but you still need to fuel. Aim for protein even when the appetite is quiet, and reach out if eating feels like a chore.
A Little Reminder
Sustainable progress and helping your body heal — not suffering your way skinny. The strongest peptide still needs the same four basics: protein, water, movement, and consistency. I'm really glad you're here. 💛
Informational only. This is not medical advice, diagnosis, or treatment. Peptides discussed are for research/educational purposes. Please work with a licensed clinician for anything specific to you.