💥 Fit Science Fat Loss Stack: The Ultimate Peptide Protocols to Get Shredded

Welcome to the most advanced, clinically inspired, real-world-tested fat loss stack available for enhanced lifters. This guide delivers two elite-level cutting stacks:

1. Injectable Fat Loss Peptide Stack for maximum effect

2. Oral-Only Peptide Stack for convenience or needle-free protocols

Whether you’re prepping for a stage cut, tightening up a recomp, or shedding serious body fat after a bulk, these protocols are designed for optimized fat oxidation, improved insulin sensitivity, and suppressed appetite—while preserving lean mass.

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🧬 Injectable Fat Loss Stack

This is the hardcore version for experienced enhanced users looking for targeted body recomposition and maximal fat stripping.

1. CJC-1295 with DAC + Ipamorelin

Mechanism: Stimulates pulsatile GH release → ↑ IGF-1 → improved fat metabolism and muscle recovery
Half-life:

• CJC-1295 DAC: ~5–8 days

• Ipamorelin: ~2 hours
  Dosage:

• Low: 1 mg CJC-1295 DAC + 100 mcg Ipamorelin 3×/week

• Medium: 2 mg CJC + 150 mcg Ipa daily

• High: 3 mg CJC weekly + 300 mcg Ipa daily (split AM/PM)
  Fat Loss Result: 4–8 lbs in 6–8 weeks when paired with calorie deficit
  Side Effects: Water retention (initial), tingles, vivid dreams

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2. 5-Amino-1MQ (Injectable Format)

Mechanism: Inhibits NNMT enzyme → ↑ NAD⁺ availability → improves energy metabolism and mitochondrial fat burning
Half-life: ~12–18 hours
Dosage:

• Low: 10 mg daily

• Medium: 20 mg daily

• High: 30 mg daily (split into AM/PM)
  Fat Loss Result: 6–10 lbs over 6–8 weeks, especially from visceral fat stores
  Side Effects: Mild headaches, slight appetite suppression, rare dizziness
  Notable: Acts synergistically with thermogenic peptides

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3. AOD-9604

Mechanism: Fragment of HGH that targets lipolysis without systemic GH action
Half-life: ~2 hours
Dosage:

• Low: 300 mcg daily

• Medium: 500 mcg AM + PM

• High: 600 mcg AM + PM
  Fat Loss Result: 4–7 lbs fat reduction, improves stubborn fat areas
  Side Effects: Minimal—no GH-related organ growth or insulin resistance

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4. Tesofensine (Compounded IM)

Mechanism: Triple monoamine reuptake inhibitor → reduces appetite, increases metabolic rate
Half-life: ~9 days
Dosage:

• Low: 0.25 mg 2×/week

• Medium: 0.5 mg/week

• High: 0.5 mg every 3 days
  Fat Loss Result: 7–12 lbs over 8 weeks with strong hunger suppression
  Side Effects: Restlessness, elevated HR, dry mouth
  Note: Helps control caloric intake dramatically

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5. L-Carnitine (Injectable)

Mechanism: Transports long-chain fatty acids into mitochondria → boosts fat oxidation
Half-life: ~3–6 hours
Dosage:

• Low: 300 mg IM pre-workout

• Medium: 500 mg IM ED

• High: 1000 mg IM ED
  Fat Loss Result: Amplifies energy/fat utilization — best stacked
  Side Effects: Injection site irritation, rare fishy odor with high dose

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💊 Oral-Only Fat Loss Stack

A powerful non-injectable fat loss protocol ideal for those avoiding needles but still seeking elite body recomp results.

1. MK-677 (Ibutamoren)

Mechanism: Oral GH secretagogue → increases GH and IGF-1 → aids fat loss and lean mass retention
Half-life: ~24 hours
Dosage:

• Low: 10 mg before bed

• Medium: 15 mg daily

• High: 20–25 mg daily
  Fat Loss Result: 4–6 lbs loss w/ preserved muscle (note: may increase hunger)
  Side Effects: Water retention, increased appetite, lethargy in some users

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2. 5-Amino-1MQ (Oral Capsules)

Same benefits as injectable, with slightly slower onset
Dosage:

• Low: 50 mg daily

• Medium: 100 mg split AM/PM

• High: 150 mg/day
  Fat Loss Result: Up to 10 lbs over 8 weeks (esp. when combined with MK or Tesofensine)

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3. Tesofensine (Oral)

Dosage:

• Low: 0.25 mg/day

• Medium: 0.5 mg/day

• High: 0.5 mg/day with 1 “off” day/week to mitigate tolerance
  Fat Loss Result: 10–14 lbs possible with proper caloric deficit

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4. Retatrutide (Oral or SubQ Weekly)

Mechanism: Triple agonist for GLP-1, GIP, and glucagon receptors → extreme appetite suppression and accelerated fat loss
Half-life: ~5–7 days
Dosage:

• Start: 0.25 mg/week

• Titrate: Add 0.25–0.5 mg every 2 weeks

• Max: Up to 8 mg/week
  Fat Loss Result: 15–24% body weight loss in clinical studies over 6–12 months
  Side Effects: Nausea, slowed digestion, possible muscle loss without GH or resistance training

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Optional: Tirzepatide / Semaglutide (alternative to Retatrutide)

Effective GLP-1 based satiety agents if Retatrutide is not accessible

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🧾 Comparison Chart: Injectable vs Oral Stack

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🧠 Who Should Use What?

• Injectable Stack:
  Ideal for enhanced lifters, competitors, and physique athletes who need aggressive fat loss while holding onto every ounce of muscle.

• Oral Stack:
  Great for intermediate users, recomp clients, or those transitioning off a bulk who prefer lower-maintenance protocols.

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⚠️ Final Tips

• Always pair peptide protocols with resistance training and a slight-to-moderate calorie deficit.

• For Retatrutide and Tesofensine: prioritize protein intake to preserve lean mass during heavy appetite suppression.

• Cycle duration:

  • 4–8 weeks for short term

  • 12–16 weeks for body transformation with GLP-1 agents

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📊 Total Fat Loss Expectations by Protocol

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📚 References

• Rothenberg ME, et al. (2023). Retatrutide for Obesity – NEJM

• Johannsen DL, et al. (2015). Tesofensine and weight loss: Obesity Research

• Yardeni T, et al. (2020). NAD+ metabolism in obesity – Cell Metabolism

• Lim GE, et al. (2018). GLP-1 and appetite regulation – Endocrinology

• FitScience community logs, user logs, and anecdotal reports (2022–2025)