Thyroxyl (T3) 25 mcg

What is Thyroxyl (T3 – Liothyronine Sodium)?

Thyroxyl by Kalpa Pharmaceuticals contains Liothyronine Sodium (T3), a synthetic form of the active thyroid hormone triiodothyronine. It is used both medically and within the bodybuilding community to enhance metabolism, support fat loss, and regulate energy during caloric deficits. Each tablet provides a precise dose of 25 mcg, allowing for controlled titration.

T3 plays a vital role in regulating cellular energy and metabolism, making it especially effective during cutting phases or contest prep where fat loss is a priority.

Main Benefits of Liothyronine (T3)

• Accelerates fat burning and weight loss
• Improves metabolism and calorie expenditure
• Enhances nutrient partitioning during calorie restriction
• Combats fatigue and sluggishness during dieting

T3 is not a stimulant like Clenbuterol but works by increasing basal metabolic rate at the cellular level. For medical insight into its hormonal action, refer to this NIH entry on thyroid hormones.

Dosage and Administration

The most common starting dose is 25 mcg/day, gradually increasing to 50–75 mcg/day depending on goals and tolerance. Due to its impact on the thyroid axis, it's advised to taper doses both at the start and end of the cycle to avoid rebound hypothyroidism.

Many users stack T3 with Clenbutaxyl for a synergistic fat-burning effect or with mild steroids like Primoxyl 25 to preserve lean mass during aggressive cuts.

Cycle Integration and Stacking

During advanced fat loss protocols, athletes combine T3 with injectable testosterone such as Testoxyl Enanthate or fast-acting options like Testoxyl Propionate. These combinations help offset muscle catabolism and hormonal suppression that can occur with elevated T3 levels.

For many physique athletes, Kalpa's pharmaceutical-grade T3 tablets have become a go-to addition for contest shredding or rapid fat-reduction cycles.

Post-Cycle Considerations

Because exogenous T3 can suppress the body's natural thyroid hormone production, it's important to taper down slowly. While PCT is not required in the same way as anabolic cycles, users may benefit from recovery support with supplements and time off.

Shipping and Availability

Thyroxyl 25 mcg is available in bottles of 100 tablets and ships both internationally and domestically across the U.S. For more fat-burning, thyroid-supportive, or cutting-phase enhancements, explore our full Kalpa Pharmaceuticals range.

Frequently Asked Questions