Xeno Labs T4 – 100mcg/50tabs
✓ Burn Fat While You Sleep – Speed up your metabolism 24/7 even when resting
✓ Break Through Plateaus – Get leaner when diet and cardio stop working
✓ Keep Energy High – Don’t feel tired and drained while cutting hard
✓ Perfect for Final Weeks – Get contest-ready by burning stubborn fat that won’t budge
Original price was: $44.90.$39.90Current price is: $39.90.
In stock
Why You Should Buy Xeno Labs T4 – 100mcg/50tabs at Steroiduck?
What It Does
T4 contains levothyroxine sodium – a synthetic version of the thyroid hormone your body naturally makes. Your thyroid controls how fast you burn calories all day long. When you diet hard for weeks, your thyroid slows down to save energy. This makes fat loss stop even when you’re eating less.
Taking T4 keeps your metabolism running fast so you keep burning fat all the way to your goal. Bodybuilders use it when they need to get super lean for competitions or photoshoots – under 6% body fat for men, under 12% for women.
The Main Benefits For You
Speed Up Your Metabolism
T4 tells your body to burn more calories every single day. Your body temperature goes up slightly. Your heart beats a bit faster. All of this means you’re burning extra calories even when sitting on the couch. Studies show it can increase your metabolic rate significantly.
Break Through Fat Loss Plateaus
After weeks of dieting, your body adapts and fat loss stops. This is called “metabolic adaptation.” T4 prevents your metabolism from slowing down during your cut. You keep losing fat consistently instead of hitting frustrating plateaus.
Maintain Training Energy
When you’re eating in a big calorie deficit, training feels exhausting. T4 helps you maintain energy levels so you can still lift heavy and do cardio without feeling completely drained. Your workouts stay productive.
Burn Stubborn Fat
That last bit of fat on your lower abs, love handles, or lower back that won’t go away no matter what you do? T4 helps your body finally burn those stubborn fat deposits by keeping your metabolism cranked up.
Simple Daily Pill
Just swallow one tablet in the morning on an empty stomach. Wait 30-60 minutes before eating breakfast. That’s it. No complicated timing or multiple doses throughout the day.
FDA DISCLAIMER: This product isn’t intended to diagnose, treat, cure, or prevent any disease. Levothyroxine is a prescription medication approved only for treating hypothyroidism and should only be used under proper medical supervision.
Recommended Starting Dosage:
25mcg (micrograms) daily for the first week. Take first thing in the morning on an empty stomach. This lets you assess tolerance and see how your body responds.
Recommended Working Dosage:
50-100mcg daily for most bodybuilders. After the first week at 25mcg, increase to 50mcg daily. If fat loss stalls and you tolerate it well, can increase to 75-100mcg daily. Advanced users sometimes go to 150mcg but this increases risks significantly.
When to Take:
Take your full daily dose first thing in the morning on an empty stomach. Wait at least 30-60 minutes before eating breakfast. This ensures proper absorption. Taking with food reduces effectiveness.
Cycle Duration:
4-8 weeks maximum. Most use it for the final 4-6 weeks before a competition. Don't run longer than 8 weeks as your thyroid can become suppressed.
Coming Off (Critical):
Taper down slowly over 1-2 weeks. Don't stop suddenly. Reduce dose by 25mcg every few days. Example: If taking 100mcg daily, drop to 75mcg for 3 days, then 50mcg for 3 days, then 25mcg for 3 days, then stop. This lets your natural thyroid function return gradually.
Important Timing:
Blood levels of T4 peak 2 hours after taking it, then remain elevated for the rest of the day due to its long 5-9 day half-life. The effects are gradual and build up over time.
Supporting Supplements:
Keep protein intake very high (1g per pound of body weight minimum) to prevent muscle loss. T4 speeds up metabolism for everything, including muscle protein. You must eat enough protein to maintain muscle.
Most Common:
- Feeling hot and sweating more than normal
- Heart rate increases (resting heart rate goes up 10-20 bpm)
- Feeling anxious, jittery, or on edge
- Insomnia or trouble sleeping
- Shaky hands
- Increased appetite (ironic when trying to lose fat)
Serious Side Effects:
- Heart palpitations or irregular heartbeat
- Muscle loss if dose too high or protein too low
- Severe anxiety or panic attacks
- Dangerous high blood pressure
- Thyroid suppression if used too long (your thyroid stops working)
- Bone density loss with prolonged use
How to Manage:
Start with low dose (25mcg). Increase gradually. Monitor resting heart rate daily - if it exceeds 100 bpm at rest, lower your dose. Get thyroid blood tests (TSH, free T4, free T3) before starting and after stopping to ensure recovery. Don't use for longer than 6-8 weeks.
Critical Warning:
If you abuse T4 or take too much for too long, you can permanently damage your thyroid gland. Your thyroid might stop working properly even after you stop taking T4. This requires lifelong medication. Always respect the dosing guidelines.
Active Ingredient:
Levothyroxine Sodium (synthetic L-thyroxine, T4)
Dosage Strength:
100mcg
Quantity:
50mcg
Intended Use:
Primary FDA-approved use: Treating hypothyroidism (underactive thyroid), thyroid hormone replacement therapy.
Primary bodybuilding use: Fat loss during cutting cycles, preventing metabolic slowdown, contest preparation final weeks, breaking through fat loss plateaus.
Classification:
Thyroid hormone, synthetic thyroxine
Mechanism of Action:
Levothyroxine is converted in the body to T3 (triiodothyronine), the active thyroid hormone. T3 increases basal metabolic rate, affects protein synthesis, increases body's sensitivity to catecholamines, and regulates metabolism of carbohydrates, fats, and proteins. It increases oxygen consumption and body temperature.
Half-Life:
5-9 days (very long half-life, stable blood levels with once-daily dosing)
Time to Peak Concentration:
2 hours after oral dose
Time to Steady State:
Approximately 4-6 weeks of daily dosing (due to long half-life)
Bioavailability:
40-80% oral absorption (highly variable between individuals)
Absorption:
Best absorbed on empty stomach. Food reduces absorption by 20-30%. Coffee and calcium supplements also reduce absorption.
Protein Binding:
Very high (>99% bound to plasma proteins)
Metabolism:
Converted to T3 (triiodothyronine) in liver, kidneys, and other tissues by deiodinase enzymes
Effects on Metabolism:
- Increases basal metabolic rate by 15-30% at therapeutic doses
- Elevates body temperature by 0.5-1°F
- Increases heart rate by 10-20%
- Enhances fat oxidation and protein turnover
Excretion:
Primarily through feces (via bile) and urine as metabolites
Molecular Formula:
C15H11I4NO4
Molecular Weight:
776.87 g/mol
Administration:
Oral tablet, swallow whole with water on empty stomach. Take 30-60 minutes before breakfast for optimal absorption.
Drug Interactions:
Many medications interact with levothyroxine including antacids, calcium supplements, iron supplements, soy products, and certain medications. Separate by 4+ hours.
Storage:
Store at room temperature 68-77°F (20-25°C) in original container. Protect from light and moisture. Keep away from children.
Also Known As:
Levothyroxine, Synthroid, Levoxyl, L-thyroxine, Thyroxine
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