Product Overview
Xeno Laboratories T3 is liothyronine sodium at 25 micrograms per tablet, the active thyroid hormone the body produces from the storage form. It is the most potent hormone on this line by weight, roughly four times as strong as its precursor per milligram, and nothing about it is anabolic: it does not build muscle, it does not affect the testosterone axis, and it is not a fat burner in the ordinary sense of the word.
Its effect is on metabolic rate. Liothyronine raises the pace at which the body spends energy, which in a cutting phase makes a deficit easier to hold and in excess produces the classic picture of an overactive thyroid: a fast pulse, sweating, heat intolerance and anxiety. The half-life is about two and a half days, though the sources describe wide individual variation, and the level rises within roughly forty-five minutes of a tablet with a peak near two and a half hours. Because the drug is biologically identical to what the thyroid makes, testing does not distinguish it from endogenous hormone, and the class is not part of the routine banned list in sport.
Where it belongs in practice is a cutting plan. It is usually discussed together with a beta-2 agonist such as Clenbuterol, and sometimes beside the storage hormone on the T4 page. Across the plan as a whole it is a metabolic tool that sits next to a course built on the testosterone series or the trenbolone series rather than replacing any of it.
Dosage Protocol
Amounts below are reference ranges for the substance, and the label for the approved medicine starts at 25 micrograms a day with 25 microgram steps every one to two weeks. The figures above that line are practice reported in the sources, not a validated protocol.
| Beginner | 12.5-25 mcg daily across four to six weeks |
| Intermediate | 25-50 mcg a day, divided into two doses because the effect is short |
| Advanced | As high as 50-100 mcg daily when peaking for a show; the toll on muscle and heart climbs with it |
| Female | Opened at the lowest steps of 12.5-25 mcg a day; no separate validated female protocol is recorded |
| Administration | Oral, in the morning and split, with a level that peaks about two and a half hours after the dose |
| Duration | Short stretches of four to six weeks, with a ramp up and a ramp down at the edges |
Two habits make the difference between a tolerable course and a bad one. The first is splitting the daily amount, because the effect of a single tablet is short even though the half-life sounds long. The second is the taper at both ends. Ramping up slowly avoids an overshoot before the first blood test, and ramping down avoids the rebound of low energy that a hard stop can produce while the thyroid axis finds its own level again.
Suggested Protocols
Three arrangements cover how the tablet is placed, and in each one it is a metabolic addition to a plan rather than its centre.
What to Expect
- The first days usually bring a higher body temperature, more sweating and a faster pulse as metabolic rate rises.
- After a week or two, more calories are being spent, so weight moves more easily at the same intake.
- Across weeks three and four, dryness and definition improve if the diet is already in place.
- Strength can fall at higher amounts, and muscle is lost alongside fat when the dose runs high.
- Too much produces the hyperthyroid picture: anxiety, tremor, insomnia and arrhythmia, including atrial fibrillation in those predisposed.
- After stopping, the thyroid takes time to settle back, and the sources do not give a confirmed timeline for that recovery.
Side Effects and Management
Thyroid Recovery and Monitoring
There is no SERM-based recovery step attached to this tablet, because it does not act on the testosterone axis. What needs attention instead is the thyroid itself: exogenous hormone reduces the signal that keeps natural production running, so the axis has to find its footing again after the course stops.
The rest of the cutting picture is on neighbouring pages: Clenbuterol for the stimulant route, T4 for the storage hormone, Nandrolone for a fuller view of the range, and Clomiphene and Tamox when the anabolic phase needs a recovery step.
