GLP-1 Microdosing Guide

What is GLP-1 Microdosing?

Microdosing means injecting smaller, more frequent doses of your GLP-1 medication instead of one larger dose per week. Total weekly milligrams stays roughly the same, but the dose-to-dose accumulation is smoother, and peak plasma concentrations are lower.

Common splits: 2x/week (every 3-4 days), 3x/week (Mon/Wed/Fri), or daily.

Why Microdose?

• Fewer side effects. Lower peaks = less nausea, GI distress, fatigue. The most common reason people microdose.
• Steadier appetite suppression. Plasma levels stay closer to optimal range — less hunger rebound at end of week.
• Easier titration sensitivity. Smaller increments help find your minimum effective dose.
• Maintenance after weight loss. Microdoses are great for staying at goal weight without re-escalating.
• Smoother lifestyle integration. No more "wreck day" 24-48 hrs after weekly injection.

The Pharmacokinetic Science

Semaglutide has a half-life of about 7 days, tirzepatide ~5 days, retatrutide ~6 days. With weekly dosing, plasma levels peak 2-3 days after injection then fall by half before the next injection. That swing creates the side-effect-heavy peak window.

When you split the dose, peak concentrations stay lower (because each individual dose is smaller). Multiple doses per week mean less time between injections, so plasma levels decline less between doses. Net result: a much smoother steady-state curve.

Visualize the difference yourself with our Microdose vs Weekly Plotter.

Who Benefits Most

• Users with significant GI side effects on standard weekly schedules
• People at maintenance dose (already at goal weight)
• Sensitive responders who want to start very low
• Users on retatrutide (the most potent GLP-1 — microdosing recommended for most users)
• Anyone who wants more consistent appetite suppression throughout the week

How to Start

1. Talk to your prescriber. Microdosing is off-label. Make sure they're aware and comfortable with the protocol.
2. Pick a frequency. Most users start with 2x/week. Daily is the smoothest but adds injection overhead.
3. Calculate your microdose. Use our Microdose Calculator for exact volumes and syringe units.
4. Start at half your weekly mg. If you were on 0.5 mg/wk, try 0.25 mg twice weekly. Don't increase total weekly mg when first switching.
5. Track for 4-6 weeks. Side effects, hunger, energy, weight. Adjust frequency or per-dose mg as needed.
6. Refrigerate vials properly. More vials in rotation = more storage organization. A vial case keeps everything organized.

Common Mistakes

• Increasing total weekly mg when starting. Switch your existing weekly mg to a microdose schedule first; only increase if needed.
• Inconsistent timing. If you pick 2x/week, stick to a schedule (e.g. Sun + Wed). Random injection days defeat the purpose.
• Not tracking. Without data, you can't tell if microdosing is helping. Track hunger, side effects, weight weekly.
• Skipping doses. Missing a microdose has more impact than missing one weekly dose because each is smaller.

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