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Growth Hormone Axis

TESAMORELIN

Egrifta. FDA-approved peptide that shrinks belly (visceral) fat by triggering a GH pulse. Has to be done at night on an empty stomach.

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Research & reference information

This profile compiles research and community-sourced reference information for educational purposes. Information may evolve as research and community knowledge develop. It is not individualized medical advice.

Overview

Egrifta.

FDA-approved peptide that shrinks belly (visceral) fat by triggering a GH pulse.

Has to be done at night on an empty stomach.

What It Does

FDA-approved GHRH analog (Egrifta), approved for HIV-associated lipodystrophy.

Full-length GHRH analog with a trans-3-hexenoic-acid modification.

Binds GHRH receptors for strong nightly GH pulses.

Reconstitution

Vial SizeBAC Water / SolventConcentration
5 mg+ 0.5 mL10 mg/mL
10 mg+ 1 mL10 mg/mL
20 mg+ 2 mL10 mg/mL
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Protocol

PhaseFrequencyAmountNotes
Weeks 1–16 (legacy)Nightly2 mgOriginal Egrifta clinical dose (no titration per label). Hold here for the full cycle.
Egrifta WR (2025)Nightly1.28 mgF8 weekly-reconstitution formulation dose. Same molecule and indication.
Off4–8 weeks–Pituitary and receptor recovery before re-cycling.
Cycle & Timing

Ongoing per FDA Egrifta label (continuous nightly for HIV lipodystrophy); off-label use sometimes cycles 12–16 wks on / 4–8 off with IGF-1 recheck.

Timing

Pre-bed nightly, fasted; no food 90 min before / 60 min after (food blunts GH response per label).

Population Considerations

Women make ~3× the GH of men yet have similar IGF-1, they’re less responsive, so often need a higher dose to move IGF-1. Oral estrogen blunts IGF-1 further (read it as running low); a skin patch/gel is more predictable. Men: Men convert GH to IGF-1 more efficiently and more often overshoot the age ceiling (a higher malignancy signal), aim mid-normal for age, don’t chase the Women make ~3× the GH of men yet have similar IGF-1, they’re less responsive, so often need a higher dose to move IGF-1. Oral estrogen blunts IGF-1 further (read it as running low); a skin patch/gel is more predictable. Men: Men convert GH to IGF-1 more efficiently and more often overshoot the age ceiling (a higher malignancy signal), aim mid-normal for age, don’t chase the top.

Handling & Stacking

Injection site
Abdomen only. Rotate quadrants.
Storage
  • Freeze-dried: -4°F.
  • Reconstituted: 36–46°F.
  • Its own label says inject soon after reconstituting and not to store the mixed drug, so treat potency as only days to ~2 weeks (structure-based estimate).
  • Keep the cold chain.
Side effects
Fluid retention, peripheral oedema, tingling. Glucose intolerance, monitor fasting glucose.
What to expect
  • Visceral-fat reduction at 8–12 weeks.
  • Strict night-only injection, food within 90 min blunts GH response significantly.
  • Monitor fasting glucose.
  • Supply math 5mg → 45 vials | 10mg → 23 | 20mg → 12 vials (16-wk @ 2 mg × 7/wk)
Pairs well with
CJC-1295 No DAC + Ipamorelin (additive GH); Tirzepatide (visceral-fat synergy)
Avoid
  • Active malignancy (FDA-labelled contraindication, USPI).
  • Severe diabetic retinopathy.
  • Monitor IGF-1 elevation.
  • MASH/NAFLD in non-HIV patients: strong off-label signal but NOT an approved indication.

Safety & Patient Education

Contraindications
Active malignancy (GH/IGF-1 can promote tumor growth); severe diabetic retinopathy; acute critical illness (per somatropin label); pregnancy and lactation.
Warnings
Glucose intolerance and new-onset T2DM (boxed-equivalent in label); fluid retention with peripheral edema; carpal tunnel with extended use; IGF-1 elevation (theoretical malignancy promotion above physiologic range); pituitary disease (hypopituitarism, post-surgical).
Drug interactions
Glucocorticoids blunt GH response; insulin/antidiabetics, GH worsens insulin resistance; levothyroxine, GH lowers free T4 (recheck TSH/fT4 quarterly); oral estrogens blunt GH-stimulated IGF-1; CYP3A4 narrow-TI substrates, recheck troughs.
Labs
  • IGF-1 (baseline + Week 8 + end; hold/reduce if IGF-1 >350–400 ng/mL or above age-ULN), Fasting glucose (Week 0/4/8) + HbA1c, Lipid panel (Week 0/12), age-appropriate cancer screening before starting., Out of range?
  • IGF-1 above your age range = too much growth signal (feeds hidden cancer, enlarges organs) → drop the dose; rising glucose/HbA1c = sugar creeping up.
Stop criteria
Fasting glucose rises >20 mg/dL above baseline; IGF-1 above age-ULN (or >2× ULN); new persistent joint pain or carpal tunnel; new/enlarging moles; vision changes; new-onset diabetes; persistent edema.
Patient education
  • GH-axis stimulation is not appropriate during active malignancy or for fertility.
  • Most GH pulses occur during deep sleep, dose pre-bed.
  • Food within 90 min blunts the response.
  • Report new lumps, persistent headaches, or vision changes immediately.
References
accessdata.fda · rxlist · researchdosing · peptidedosages · DailyMed · PubMed · Span 2000 · Weissberger 1991