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📖Complete Guide✅Updated 2026🔬Evidence-Based

GLP-1 for Bodybuilding

Cutting Protocols 2026

How bodybuilders are using GLP-1 agonists (semaglutide, tirzepatide) for contest prep and aggressive cutting phases.

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14-day streak
Logged 18 of 18 scheduled shots
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ACTIVE MEDICATIONS
GLP-1 For BodybuildingB12
GLP-1 FOR BODYBUILDING
🔥 14
2
days away
Thursday · 7.5mg
⌄
Medication Supply
GLP-1 For Bodybuilding
6.2 / 10 mg · Vial
~42 days left · Mar 15
B12
4.4 / 5 ml · Vial
~88 days left · May 8
Retatrutide
1.2 / 5 mg · Vial
~6 days left · refill soon
Medication Levels
7 Days2 Weeks1 Month90 Days
CURRENT LEVEL
5.42mg
Mar 6
Today
ACTIVE MEDICATIONS
GLP-1 For BodybuildingRetatrutide
0mg2.7mg5.4mg
18
Total Injections
💉 All time
122/78
Average BP
🩺 mmHg
8.4
Avg Mood
😊 /10
Health Chart
1mAll
218.6lb
↓ 8.4 lb · 3.7%
WeightInjectionsBPMood
2282222162102277.5mg7.5mg4mg10mg218
Feb 6Feb 14Feb 22Mar 2Today
Photos
12 photos · 2w streak
Week 1
Week 7
Today
Scheduled Reminders
Weight
Due today
Mood
Done
Blood Pressure
Tomorrow
Body Measurements
In 3 days
Dashboard
Your complete health overview in one place
🔥
14-day streak
Logged 18 of 18 scheduled shots
Next Shot Reminder
⌄
ACTIVE MEDICATIONS
GLP-1 For BodybuildingB12
GLP-1 FOR BODYBUILDING
🔥 14
2
days away
Thursday · 7.5mg
⌄
Medication Supply
GLP-1 For Bodybuilding
6.2 / 10 mg · Vial
~42 days left · Mar 15
B12
4.4 / 5 ml · Vial
~88 days left · May 8
Retatrutide
1.2 / 5 mg · Vial
~6 days left · refill soon
Medication Levels
7 Days2 Weeks1 Month90 Days
CURRENT LEVEL
5.42mg
Mar 6
Today
ACTIVE MEDICATIONS
GLP-1 For BodybuildingRetatrutide
0mg2.7mg5.4mg
18
Total Injections
💉 All time
122/78
Average BP
🩺 mmHg
8.4
Avg Mood
😊 /10
Health Chart
1mAll
218.6lb
↓ 8.4 lb · 3.7%
WeightInjectionsBPMood
2282222162102277.5mg7.5mg4mg10mg218
Feb 6Feb 14Feb 22Mar 2Today
Photos
12 photos · 2w streak
Week 1
Week 7
Today
Scheduled Reminders
Weight
Due today
Mood
Done
Blood Pressure
Tomorrow
Body Measurements
In 3 days
01BACKGROUND

Cutting Protocols, Contest Prep & Muscle Preservation

GLP-1 receptor agonists (semaglutide, tirzepatide) have fundamentally changed bodybuilding contest prep. By providing profound appetite suppression, they allow competitors to sustain the extreme caloric deficits required for stage-lean conditioning without the psychological torture of traditional prep diets. Here is how they are used in physique sports.

02WHAT TO TRACK

The Bodybuilding Application

01
🔬
1. The Hunger Management Paradigm
Getting to 4-6% body fat requires enduring severe, sustained caloric restriction that triggers massive ghrelin (hunger hormone) spikes. Historically, competitors used thermogenics (ECA stack, clenbute
02
💉
2. Dosing Protocols for Cutting
Unlike the general obesity population (which titrates up to massive doses like 2.4mg Wegovy), bodybuilders typically use much lower "micro-doses." A common protocol is 0.25mg to 0.5mg of semaglutide p
03
🔬
3. Muscle Preservation & GI Management
The primary risk of GLP-1s in bodybuilding is muscle loss due to inadequate protein intake (because the athlete feels too full to eat). Successful protocols rely on drinking liquid protein (hydrolyzed
03WHAT TO TRACK

Vital Protocol FAQs

01
⚖️
Do GLP-1s cause muscle loss?
GLP-1s themselves do not directly chew up muscle tissue (they are not catabolic hormones). Muscle loss on GLP-1s happens because of extreme caloric deficits paired with inadequate protein intake. If a
02
🔬
Which is better for prep: Semaglutide or Tirzepatide?
Many advanced competitors currently favor Tirzepatide. The addition of GIP agonism seems to result in significantly better insulin sensitivity and less harsh GI side effects (less nausea) compared to
03
📱
Can I track my GLP-1 prep cycle with Shotlee?
Yes. Shotlee is ideal for this. You can log your micro-doses of GLP-1 alongside your daily macro targets, track your morning fasting weight, and document your body fat percentage progression leading u
04OVERVIEW

Why Track This Protocol

Evidence Base

Backed by peer-reviewed clinical research and real-world user data, with clear mechanisms of action.

Protocol Tracking

Log your for Bodybuilding protocol in Shotlee to identify what works, what doesn't, and optimize over time.

Measurable Outcomes

Track key metrics before and during your protocol to see objective improvements, not just subjective feelings.

Side Effect Monitor

Log any adverse reactions immediately to catch dose-response patterns before they become problems.

Stack Compatibility

Understand how this protocol interacts with other compounds in your stack for maximum benefit and safety.

Data-Driven Decisions

Use your Shotlee charts and trend data to make informed decisions about dose adjustments and protocol duration.

05FAQ

Guide FAQs

How bodybuilders are using GLP-1 agonists (semaglutide, tirzepatide) for contest prep and aggressive cutting phases.

Yes. Shotlee tracks GLP-1 and peptide doses, side effects, weight, and lab results — free to use.

Free · Always

Track Your GLP-1 Protocol in Shotlee

Free dose logging, side effect tracking, and health metric monitoring for your complete protocol.

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📚References & sources

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