Fat Loss Stack
T3 + Clenbuterol + L-Carnitine — metabolic rate, fat release, and fat transport in one line.
Overview
The classic thermogenic protocol, built as a complete fat-oxidation chain. T3 raises the metabolic rate at the cellular level, Clenbuterol signals fat cells to release stored fatty acids via beta-2 activation, and injectable L-Carnitine shuttles those freed fatty acids into the mitochondria to actually be burned. Each compound covers the step the others can't — release, transport, oxidation. No hormonal suppression, no PCT.
Who it's for
- 01Researchers breaking through a fat-loss plateau on a structured diet
- 02Final-phase cutting where diet alone has stopped moving the needle
- 03Stimulant-tolerant researchers — Clenbuterol is not subtle
What's inside — 3 compounds
$67.00
View PDP →- Dose
- 25 mcg
- Frequency
- Daily
- Weeks
- 1-6
- Category
- orals
Morning, fasted. Hold at 25 mcg — taper last week to 12.5 mcg.
$75.00
View PDP →- Dose
- 40 mcg
- Frequency
- Daily
- Weeks
- 1-8
- Category
- orals
2 weeks on / 2 weeks off. Start 20 mcg, assess, then 40 mcg. Never after 2 PM.
$42.00
View PDP →- Dose
- 500 mg
- Frequency
- Daily
- Weeks
- 1-8
- Category
- injectables
Intramuscular, 60–90 min pre-training with carbs or post-meal (insulin drives uptake).
Weekly Protocol
Clenbuterol cycles 2-on/2-off (weeks 1–2, 5–6 on; 3–4, 7–8 off) to preserve beta-2 receptor sensitivity — taurine 3 g daily prevents the signature cramps. T3 runs weeks 1–6 at a conservative replacement-plus dose, tapering the final week. L-Carnitine runs straight through. The deficit is the engine; this stack is the multiplier — without the diet, nothing here matters.
| Compound | Dose | Frequency | Weeks |
|---|---|---|---|
| T3 Cytomel | 25 mcg | Daily | 1-6 |
| Clenbuterol | 40 mcg | Daily | 1-8 |
| L-Carnitine | 500 mg | Daily | 1-8 |
Expected Outcomes
- 1.5–2.5 lb/week fat loss on an enforced deficit — roughly double diet-alone rate
- Preserved training energy despite the deficit (carnitine + clen)
- Visible definition change by weeks 3–4
- No testosterone suppression — thyroid recovers within weeks at this dose/duration
Support Requirements
Items referenced in the protocol. Some are included in the stack; support-only items may need to be ordered separately.
Daily L-Carnitine intramuscular administration
Safety & Warnings
- Clenbuterol is contraindicated with any cardiac history, arrhythmia, or uncontrolled blood pressure — no exceptions.
- Do not exceed 6 weeks of continuous T3 at this dose without a thyroid panel.
- Muscle cramps on clen mean taurine and electrolytes are inadequate — fix before raising the dose.
- Combining with other stimulants (high caffeine, pre-workouts) multiplies cardiovascular load.
- T3 in a large deficit without resistance training burns muscle, not just fat.
Frequently Asked
Will T3 shut down my thyroid permanently?
At 25 mcg for 6 weeks — no. Exogenous T3 suppresses TSH while present, and output resumes within days to weeks after stopping. The taper exists to smooth the handoff. Permanent damage stories come from 75–100+ mcg run for months.
Why is the L-Carnitine injectable?
Oral L-carnitine has ~15% bioavailability and most never reaches muscle. Intramuscular delivery with an insulin spike (carbs) saturates muscle carnitine stores — the form the fat-transport studies actually used.
Can I run this on a steroid cutting cycle?
Yes — it's the standard final-phase addition to the Cutting Cycle stack. Different mechanisms entirely. Watch combined cardiovascular load if tren is on board: tren already taxes cardio, clen adds heart rate.
Research disclaimer
All stack suggestions reflect the published literature and are provided for research-reference purposes only. Individual protocols require compound-specific planning. Consult the stacking theory guide before designing your protocol. Not medical advice.