Liothyronine (T3) 50 mcg

Stealth Labs Liothyronine (T3): The Ultimate Metabolic Accelerator

When diet and exercise alone are not enough to break through stubborn fat loss plateaus, bodybuilders and athletes turn to the most direct metabolic catalyst available: Liothyronine Sodium, commonly known as T3. Stealth Labs Liothyronine (T3) delivers a precise 50 mcg dose of the active thyroid hormone triiodothyronine, the primary driver of your body's metabolic rate. Unlike T4 (Thyroxine), which must be converted by the liver into T3, this compound is immediately bioavailable and potent. It works at the cellular level to dramatically increase your basal metabolic rate (BMR), turning your body into a highly efficient fat-burning furnace and making it an indispensable tool for pre-contest preparation and extreme cutting phases.

Given its potency and the critical nature of thyroid function, precision in dosing is paramount. Stealth Labs ensures absolute reliability and safety through independent third-party laboratory testing. The latest analysis confirms a content of 57.34 mcg of Liothyronine per tablet, guaranteeing you receive a consistently dosed, high-quality product that you can trust for predictable and controlled results. When you buy Liothyronine (T3) from Stealth Labs, you are investing in one of the most powerful endocrinological tools for physique transformation.

How T3 Works: The Science of Metabolic Acceleration

Liothyronine (T3) is the biologically active form of thyroid hormone that directly interacts with nuclear receptors in cells throughout the body. Its primary role is to regulate metabolism, and its effects are systemic and profound.

• Dramatically Increases Metabolic Rate: T3 binds to receptors in the cell nucleus, stimulating an increase in metabolic activity. This forces the body to burn more calories at rest, creating a significant energy deficit even without changes in diet or activity level.
• Enhances Thermogenesis: The increased metabolic activity generates heat, a process known as thermogenesis. This further contributes to calorie expenditure and can lead to noticeable increases in body temperature.
• Accelerates Fat Mobilization and Oxidation: T3 promotes the breakdown of stored fat (lipolysis) and increases the rate at which fatty acids are burned for energy (fat oxidation). It is particularly effective at targeting stubborn fat stores that are resistant to other methods.
• Increases Carbohydrate Metabolism: The hormone also enhances the body's use of glycogen and glucose, ensuring that energy substrates are rapidly utilized rather than stored.
• Potentiates Other Fat-Loss Agents: T3 has a powerful synergistic effect with other compounds. It dramatically increases the fat-burning potency of Clenbuterol and can enhance the effects of growth hormone by mitigating the reduction in thyroid output that HGH can cause.

The critical role of Liothyronine in regulating metabolic rate is well-established in medical science. Research on the National Library of Medicine (PubMed) details its mechanism of action on cellular metabolism and its clinical use, underscoring its powerful biological activity.

Recommended T3 Dosage and Tapering Protocol

T3 is exceptionally potent, and its use requires a carefully planned and tapered protocol to avoid shocking the system and to allow for the safe recovery of natural thyroid function. The Stealth Labs 50mcg tablet is ideal for this precise tapering strategy. Never start at a high dose.

• Ramping Up Phase (Weeks 1-2): Begin with a low dose to assess tolerance. A common starting point is 25 mcg per day (half a tablet). After 3-5 days, if well-tolerated, increase to 50 mcg per day. Some advanced users may slowly ramp up to 75-100 mcg, but this significantly increases the risk of muscle loss.
• Plateau Phase (Weeks 3-6): Maintain your effective dose. For most, 50-75 mcg per day is the sweet spot for fat loss with manageable side effects. Cycles should not exceed 6 weeks to minimize the risk of long-term thyroid suppression.
• Tapering Down Phase (Weeks 7-8): This is the most critical phase. Do not stop T3 abruptly. Mirror the ramp-up in reverse: reduce your dose by 25 mcg every 4-5 days until you are back to 25 mcg, then 12.5 mcg, before discontinuing. This gradual reduction helps stimulate the natural reactivation of your thyroid gland.

Important Note: Due to its short half-life (approx. 2.5 days), T3 should be split into 2-3 daily doses (e.g., morning and early afternoon) to maintain stable blood levels and avoid peaks and troughs.

Effective T3 Cycles and Synergistic Stacks

T3 is almost never used alone, as its potent catabolic nature can lead to significant muscle loss without the protective influence of anabolic compounds. It is a powerful component of advanced cutting stacks.

• The Classic Cutting Stack: The most common and effective use is stacking T3 with Clenbuterol. This combination provides a powerful one-two punch of metabolic acceleration (T3) and thermogenic stimulation (Clen), creating an unparalleled fat-burning environment.
• Muscle-Preserving Cutting Cycle: To prevent the catabolic effects of T3, it is essential to run a protective dose of anabolic steroids. A base of Testosterone Propionate 100 at 300-500mg/week or Masteron Propionate 100 is crucial. Adding a dry oral like Winstrol 50 or Anavar 50 can further enhance hardness while protecting muscle.
• Growth Hormone Enhancement Stack: Exogenous Growth Hormone (e.g., Somatropin 100 IU) can suppress natural thyroid output. A low dose of T3 (12.5-25 mcg/day) is often used alongside HGH to maintain optimal metabolic rate and enhance fat loss, without the catabolic risks of a full T3 cycle.
• Advanced Pre-Contest Protocol: In the final weeks before a show, bodybuilders may combine T3, Clenbuterol, and a diuretic protocol to achieve extreme leanness. This is highly advanced and should not be attempted without experienced guidance.

Possible Side Effects and How to Manage Them

T3 is a powerful hormone, and mismanagement can lead to serious side effects. Responsible use involves understanding and mitigating these risks.

• Muscle Catabolism (Muscle Loss): This is the most significant risk. T3 does not discriminate between fat and muscle tissue; it accelerates the metabolism of all energy substrates. This is why running a protective anabolic steroid is non-negotiable. Without it, you will lose hard-earned muscle.
• Symptoms of Hyperthyroidism: These include excessive sweating, feeling hot all the time, insomnia, nervousness, tremors, and a rapid or irregular heartbeat. These are signs that your dose is too high and should be reduced.
• Suppression of Natural Thyroid Function: Exogenous T3 will suppress your body's production of TSH (Thyroid Stimulating Hormone) and its own T4/T3. This is why cycles must be limited and a proper taper is essential. Natural function typically recovers within a few weeks of cessation if the cycle was well-managed.
• Increased Hunger: As your metabolism revs up, your appetite can significantly increase. This must be managed with a disciplined diet to avoid consuming the extra calories you are burning, which would nullify the fat-loss effects.
• Cardiac Strain: Like any stimulant to metabolism, T3 increases heart rate and cardiac output. Those with pre-existing heart conditions should avoid T3 entirely.

The Golden Rule: More is not better with T3. The goal is to find the lowest effective dose that accelerates fat loss without causing debilitating side effects or significant muscle loss.

T3 vs. T4 (Thyroxine): Understanding the Difference

It's crucial to distinguish between T3 (Liothyronine) and T4 (Levothyroxine). T4 is the storage hormone produced by the thyroid gland. It must be converted in the liver and other tissues into the active T3. This conversion process is inefficient and can be affected by diet, stress, and other factors. T3 is 4-5 times more potent than T4 and begins working immediately. For bodybuilding purposes, T3 is preferred for its predictability, potency, and immediate effects. T4 is less reliable for creating a precise metabolic boost due to its dependency on conversion.

Post-Cycle Thyroid Recovery

After completing a T3 cycle, supporting your body's natural thyroid recovery is important. Certain nutrients are co-factors for thyroid hormone production. Consider supplementing with:

• Iodine: A critical component of thyroid hormones.
• Selenium: Essential for the conversion of T4 to T3.
• Zinc: Plays a role in thyroid hormone production.
• Ashwagandha: This adaptogen has been shown in some studies to support healthy thyroid function and T4 to T3 conversion.

Following the proper tapering protocol is the single most important factor for recovery. Post-cycle blood work to check TSH, T4, and T3 levels is highly recommended to confirm your thyroid function has returned to baseline.

Liothyronine (T3) Profile

Name: Liothyronine Sodium
Drug Class: Thyroid Hormone
Other common names and terms: T3, Cytomel, Triiodothyronine
Active Life: 2.5 days
Detection Time: Up to 10 days
Chemical Structure: (S)-2-amino-3-[4-(4-hydroxy-3-iodophenoxy)-3,5-diiodophenyl]propanoic acid
Common Doses: 25-100 mcg/day (ramped and tapered)
Blood pressure: Can increase heart rate and cardiac output
Acne: No direct effect
Water retention: No effect; may cause dryness
Aromatisation: Does not aromatize
Liver toxicity: Not liver toxic
Decrease HPTA function: Does not suppress testosterone, but suppresses natural thyroid function

Third Party Lab Test Results

2024-01-18

View Result

57.34 mcg