T4 by Dragon Pharma
What Is T4?
T4 by Dragon Pharma is a thyroid hormone tablet containing levothyroxine sodium, also known as L-thyroxine, the same compound sold under medical brands such as Synthroid. Each tablet holds 50 mcg, and a bottle contains 100 tablets. T4 is the storage hormone of the thyroid: the body converts it into the active form, T3, as it is needed.
In bodybuilding, T4 is used when an athlete wants steady metabolic support rather than the sharp push of synthetic T3. Because conversion happens gradually, the effect builds over days instead of hours, and the metabolic lift is smoother and easier to control during a long cut. Some protocols even pair T4 with a small amount of T3 to cover both the storage and the active sides of thyroid signaling.
Like any exogenous thyroid hormone, T4 suppresses the body's own thyroid output, so use is planned in blocks and ended with a taper. Dragon Pharma T4 is a prescription-class hormone sold for reference use, not a fat burner in the stimulant sense.
T4 Dosage
T4 reference dosing in bodybuilding is larger than T3 in micrograms because T4 is less potent and must be converted. The commonly referenced range is 50 to 150 mcg per day, taken in the morning on an empty stomach for consistent absorption. Each Dragon Pharma tablet is 50 mcg.
| Parameter | Reference | Note |
|---|---|---|
| Starting dose | 50 mcg per day | 1 tablet, assess over a week |
| Common range | 100-150 mcg per day | 2-3 tablets in deeper conditioning phases |
| Timing | Morning, empty stomach | Food and caffeine can change absorption |
| Onset | Several days to build | Needs conversion into active T3 |
| Cycle length | 4-10 weeks | Ended with a taper to restart thyroid output |
Onset and Duration
Because T4 depends on conversion, response is individual and slower to read than with T3. Energy, pulse and body temperature are the practical signals used to adjust the dose. High over-replacement brings the same hyperthyroid symptoms as T3, just with a slower onset.
T4 Stacks
T4 fits long conditioning phases and is often combined with a small amount of active T3 plus tissue-preserving and metabolic partners. All partners below are Dragon Pharma products.
| Stack partner | Role in the stack |
|---|---|
| T3 | Active-hormone cover in a T3:T4 style protocol |
| Clenbuterol | Metabolic drive for the deepest cut weeks |
| Salbutamol | Milder metabolic partner for long blocks |
| Anavar 10 | Lean-tissue support during the deficit |
| GW 501516 | Endurance while calories are restricted |
| L-Carnitine 500 | Fat transport and steady daily energy |
| Tirze-Pep 5mg | Separate appetite-side metabolic research peptide |
In longer preps T4 is sometimes preferred over T3 because its slower curve is easier to hold steady for weeks, while a small T3 addition covers the active fraction of the signal.
T4 Side Effects
T4 side effects appear when thyroid hormone is over-replaced, and because T4 acts through conversion they build more slowly than with T3.
- Heart effects: elevated pulse and palpitations at high doses.
- Heat intolerance and sweating: classic signs of over-replacement.
- Muscle catabolism: possible when the dose is pushed high for a long time.
- Thyroid suppression: natural output drops, so a taper ends the run.
- Digestive absorption: food, coffee and some supplements change how well T4 absorbs.
The discipline for T4 is the same as for T3: morning dosing, a controlled block, and a gradual taper at the end so the thyroid can find its own rhythm again.
What is T4?
T4 is the short name for thyroxine, the storage hormone of the thyroid. Dragon Pharma supplies it as levothyroxine sodium 50 mcg tablets, the same compound used in medical brands like Synthroid.
What is the difference between T4 and T3?
T4 is the inactive storage form that the body converts into T3, the active hormone that drives metabolism. T4 acts more slowly and smoothly, while T3 is faster and sharper.
Why do bodybuilders use T4?
Bodybuilders use T4 for steady metabolic support during long cutting phases. Because it converts gradually, its effect is smoother and easier to hold for weeks than synthetic T3.
What is the right T4 dosage?
Reference doses run from 50 to 150 mcg per day, taken in the morning on an empty stomach. A starting dose is 50 mcg, adjusted by energy, pulse and temperature over time.
How long does T4 take to work?
T4 needs to be converted into T3, so its effects build over several days rather than hours. Full metabolic response is usually judged after one to two weeks at a stable dose.
What are the side effects of T4?
At high doses T4 causes elevated heart rate, palpitations, heat intolerance, sweating and muscle catabolism, the same over-replacement symptoms as T3 but with a slower onset.
Can T4 be stacked with T3?
Yes. Some protocols use T4 as the base and add a small amount of T3 to cover the active fraction of thyroid signaling, since not all T4 is converted efficiently.
Does T4 suppress your own thyroid?
Yes, exogenous thyroid hormone reduces the body's own production. That is why T4 use is planned in blocks and ended with a taper instead of stopping abruptly.
Is T4 better than T3 for fat loss?
Neither is inherently better; they are different tools. T4 gives a steadier, longer metabolic curve for extended cuts, while T3 acts faster and stronger for short, deep conditioning windows.
Where to buy T4 online?
Dragon Pharma T4 50 mcg tablets are available in this shop as a bottle of 100 tablets for reference use, with domestic and international shipping options.
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