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My Ozempic Diet
Protocol Guide

The GLP-1 Muscle-Sparing & Body Recomposition Protocol

Preserving lean mass while on semaglutide or tirzepatide. A structured protocol covering the sarcopenia risk, peptide co-therapies, protein and leucine targets, and how to vet the people selling you all of it.

Medically Reviewed • Updated September 2026

My Ozempic Diet Medical Editorial Team · 11 min read

ISO 17025 Third-Party COA
Physician Prescribed Options
Made in USA
Batch-Level Traceability

Module 1

Why 25–40% of GLP-1 Weight Loss Is Muscle — the Sarcopenia Trap

The scale is a poor instrument for judging a GLP-1 outcome. Total mass is the sum of fat, lean tissue, glycogen and water, and incretin therapy does not selectively target the first. Across the published body-composition substudies, somewhere between a quarter and two-fifths of everything lost is lean tissue when nothing is done to defend it.

What the trial data actually shows

Semaglutide substudies within the STEP program placed the lean-mass fraction near 39%. Tirzepatide's SURMOUNT body-composition analyses came in more favorably, around 25%. Those figures describe participants who were not enrolled in a structured resistance-training or high-protein arm — which describes most people taking these drugs today.

Why appetite suppression makes it worse

GLP-1 agonists reduce total intake by suppressing appetite, and protein is disproportionately the first macronutrient to fall. It is the most satiating, the slowest to digest, and the least appealing when gastric emptying is already delayed. The result is a caloric deficit paired with an inadequate amino acid supply — the exact physiological signature that drives muscle protein breakdown.

Why lean mass matters beyond aesthetics

  • Skeletal muscle is the largest site of insulin-mediated glucose disposal — losing it undermines the metabolic benefit you took the drug for.
  • Resting metabolic rate falls with lean mass, lowering the calorie ceiling you can eat at during maintenance.
  • Grip strength and lower-limb power predict long-term functional independence, particularly after age 60.
  • Post-cessation regain is overwhelmingly fat, so each loss-and-regain cycle worsens body composition.

The trap in one sentence: the faster the loss, the higher the lean fraction — so the more effective your medication, the more deliberate your preservation strategy has to be.

GLP-1 Lean Mass & Protein Calculator

Enter your current weight, your weight-loss goal and your compound. The calculator returns a daily protein minimum, a per-meal leucine threshold, an estimate of the lean mass at risk, and the co-therapies typically layered at that level of deficit.

Daily protein minimum

100 g

Ceiling 123 g · goal weight 170 lb

Leucine threshold

2.5–3 g

per meal · 3 feedings of ~33 g protein

Lean mass at risk

~15.6 lb

at 39% unprotected loss

Semaglutide: ~1.0–1.4% of body weight per month at maintenance dose. STEP body-composition substudies reported roughly 39% of lost mass as lean tissue with no training or protein intervention.

Recommended co-therapies to discuss

  • Creatine monohydrate — 5 g daily, with deliberate hydration — the highest-evidence lean-mass tool available.
  • Essential amino acids (EAAs) — Use on days you fall short of 100 g; each serving must carry 2.5–3 g leucine.
  • CJC-1295 / Ipamorelin — Discuss with a prescriber — a deficit of this size warrants GH pulse support for nitrogen retention and recovery.
  • BPC-157 — Connective tissue and gut support while joint loading changes rapidly and gastric emptying is delayed.

Estimates only, based on published body-composition substudy averages. Not a substitute for a clinician's assessment.

Module 2

The Co-Therapy Stack, Broken Down

Nothing here replaces protein and resistance training. These are amplifiers layered on top of a foundation that has to exist first.

CJC-1295 / Ipamorelin

GH pulse amplification

A GHRH analogue paired with a selective ghrelin-receptor agonist. Together they amplify the amplitude of natural nocturnal growth-hormone pulses rather than replacing them.

  • Ipamorelin is receptor-selective: it does not meaningfully raise cortisol or prolactin, unlike GHRP-2 and GHRP-6.
  • Supports nitrogen retention and collagen turnover during an aggressive caloric deficit.
  • Typically dosed at night to align with the body's natural GH pulse window.
  • Prescription or research status depending on formulation — requires a licensed prescriber.

Caution: Not appropriate with active malignancy, uncontrolled diabetes, or during pregnancy. IGF-1 monitoring is standard practice.

BPC-157

Joint integrity & gut repair

A synthetic pentadecapeptide derived from a gastric protective protein, used for tendon, ligament and GI-lining support while body mass shifts rapidly.

  • Rapid weight change alters joint loading, and tendon adaptation lags muscular adaptation by months.
  • GLP-1 therapy slows gastric emptying; BPC-157 is commonly stacked for GI comfort during titration.
  • Available in injectable and oral (enteric) forms; oral is generally preferred for gut-focused goals.
  • Human clinical evidence is limited — the evidence tier here is preclinical plus clinical observation.

Caution: Not FDA-approved. Placed on the FDA's category 2 bulk substances list, which restricts 503A compounding availability.

Creatine Monohydrate & EAAs

Foundational, highest evidence tier

The two non-peptide pillars of the protocol, and the ones with the strongest human evidence base for preserving lean mass in a deficit.

  • Creatine monohydrate 3–5 g daily — no loading phase required, and no interaction with GLP-1 agonists.
  • EAAs bridge the gap when appetite suppression makes whole-food protein targets unrealistic.
  • Each EAA serving should deliver 2.5–3 g of leucine to cross the muscle-protein-synthesis threshold.
  • Hydration is non-negotiable: creatine draws water intracellularly and GLP-1 users under-drink.

Caution: Discuss creatine with your clinician if you have reduced kidney function or are on nephrotoxic medications.

Nutrition

Nutrition & Protein Targets

How much protein do you actually need?

Anchor the target to your goal body weight rather than your current weight, which avoids inflating the number for people carrying a large amount of adipose tissue. The working range is 1.2–1.6 g per kilogram of goal weight per day. Push toward the top of that range if you are over 60, losing more than 1% of body weight per week, or training hard.

The leucine threshold

Muscle protein synthesis behaves like a switch rather than a dial. It needs roughly 2.5–3 g of leucine in a single feeding to activate, which is about 30–40 g of a high-quality protein such as whey, eggs, dairy or lean meat. Four small feedings that each fall below the threshold do less for lean mass than two that clear it.

Practical tactics when appetite is suppressed

  • Front-load protein at the first meal, when GLP-1 appetite suppression is usually weakest.
  • Use liquid calories — a whey or EAA shake delivers the leucine threshold without the volume load of solid food.
  • Separate fluids from meals by 30 minutes so early fullness does not displace protein.
  • Keep fibre moderate on training days; it competes for gastric volume you need for protein.
  • Track for two weeks only. Most people are 30–50 g short of their target and do not know it until they measure.

Training is the other half

Protein supplies the raw material; resistance training supplies the signal. Two to four sessions per week across the major movement patterns is the minimum effective dose. As calories fall, hold load constant and reduce volume rather than the reverse — maintaining intensity is what tells the body the tissue is still needed.

Module 3

Vendor Vetting & Sourcing Matrix

Two legitimate supply routes exist in the United States, and they serve different needs. Everything outside them carries risk that no price advantage justifies.

503A Compounding Telehealth

Physician consult + patient-specific compounded prescription

Physician Prescribed US Verified COA Made in USA
Typical products
Compounded semaglutide/tirzepatide, GH secretagogue peptides
Lead time
3–7 days after prescription
  • Patient-specific prescriptions written by a licensed US prescriber
  • State board of pharmacy licensure and inspection
  • Dose titration and clinical oversight included
  • Requires an intake consult
  • Higher per-unit cost than research-grade supply
Request a Partner Match

Accredited Domestic Peptide Distributor

Direct-to-consumer supply of research-grade compounds

Third-Party Tested US Verified COA ISO 17025
Typical products
BPC-157, CJC-1295, Ipamorelin, ancillary support compounds
Lead time
1–3 days domestic shipping
  • Batch-specific ISO 17025 third-party certificates of analysis
  • HPLC purity typically verified above 98%
  • Fast domestic fulfillment, no international customs exposure
  • No clinical oversight — you are responsible for protocol decisions
  • Research-use-only labeling; not a substitute for prescribed therapy
Browse Vetted Products

Offshore / Unverified Marketplace

Grey-market resale, often via social platforms

No verified credentials
Typical products
Mixed, frequently mislabeled
Lead time
2–6 weeks, customs risk
  • Lowest headline price
  • No batch-specific COA, or a recycled COA from a different lot
  • Documented under-dosing, contamination and endotoxin failures
  • No recourse, no traceability, no US regulatory exposure

The five-point COA checklist

  1. The certificate names your specific batch or lot number, not a generic sample.
  2. The issuing laboratory is ISO 17025 accredited and independent of the seller.
  3. HPLC purity is stated numerically and exceeds 98%.
  4. Mass spectrometry confirms the molecular weight matches the claimed compound.
  5. Sterility and endotoxin results are present for anything injectable.

Frequently Asked Questions

Body-composition substudies of semaglutide and tirzepatide consistently show that roughly 25–40% of total weight lost is lean mass when no resistance training or protein strategy is in place. That proportion falls substantially — often to 10–20% — when protein intake is kept high and progressive resistance training is performed two to four times per week.

Medical disclaimer: This guide is educational and is not medical advice. Peptides discussed here are not FDA-approved for body composition, and several are research compounds only. Always consult a licensed clinician before starting, stopping or combining any medication or peptide, particularly alongside GLP-1 therapy.
Bundle

The Lean Preservation Protocol Bundle

The foundational stack from this protocol in one place: high-leucine EAA formula, creatine monohydrate, and vetted routes to physician-supervised peptide co-therapy.

  • ISO 17025 third-party tested
  • US Verified COA on every batch
  • Physician-prescribed options available
  • Made in USA
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