What is Test/Tren Short 150?
Test/Tren Short 150 is a ready-made oil solution with 75mg testosterone propionate and 75mg trenbolone acetate per ml, 150mg/ml in total. One vial holds 10 ml and needs no mixing. "Short" refers to the short esters, which call for frequent injections.
Testosterone and trenbolone are mixed 1:1, so the testosterone base is built in. Trenbolone acetate is the form used as an implant in livestock; it was never approved for humans. Not a beginner blend: the tren share sets the side-effect profile.
This information is for research and educational purposes only. No medical advice.
Comparison
Testosterone and trenbolone in four oils
Which compounds each oil contains, as stated in the TPD lexicon. Tap a card to open its entry.
Simplified: the same compounds do not mean the same amount per ml. Every extra compound brings its own side effects.
How it works
Both compounds activate the androgen receptor in muscle and drive protein synthesis and strength. Trenbolone binds much more strongly than testosterone, does not aromatize to estradiol and holds little water, but acts on the progesterone receptor. Testosterone aromatizes normally and supports libido and wellbeing.
Propionate has a half-life of about one day, acetate about one to three days. Levels rise quickly and fall just as quickly after stopping. In a research context that counts as an advantage, because you can react to side effects within a few days.
Where it acts
One receptor, several organs
Tap a point or a card. Grey = effect seen in trials.
- Hypothalamus and pituitary
LH suppressed as long as testosterone was raised, one to two days with propionate7
Observed in trials - Blood
Haemoglobin and haematocrit rose with the testosterone dose, more in older men8
Observed in trials - Liver and blood lipids
HDL cholesterol fell by about 60 percent under several anabolic steroids at once3
Observed in trials - Heart
Pumping function lower in long-term users (52 vs 63 percent), more coronary plaque4
Observed in trials - Skeletal muscle
Muscle size in arms and legs and strength increased, most with training1
Observed in trials - Skin
Acne in 28 of 100 users, breast tissue growth in 195
Observed in trials
Targets in the ChEMBL database10
Compound CHEMBL1170: one recorded mechanism, agonist with direct binding to the human receptor.
- Gene
- AR
- UniProt
- P10275
- ChEMBL
- CHEMBL1871
- Action
- Agonist, direct binding
Use and dosing
Dosing
Dosing, titration and syringe
Loading the dosing information …
- Getting started and stepping up, drawn as a staircase
- Units on the U-100 syringe for every step
- How long one vial lasts
Injection
Intramuscular into the glute, thigh or shoulder, with a thick needle to draw up and a thin one (23G to 25G) to inject. Disinfect the stopper and the site first and, with this many injections, rotate sites consistently. Aspirating first and injecting slowly lowers the risk of tren cough.
Short esters like propionate and acetate sting noticeably more than long ones and irritate subcutaneous fat. Subcutaneous use is therefore a poor fit for this blend. If lumps or strong stinging appear, spread the volume over several sites.
What the research shows
Supraphysiologic testosterone increased muscle size and strength in healthy men within ten weeks (Bhasin, 1996). Trenbolone is described as a very potent anabolic with reduced androgenic and estrogenic activity, but the data come almost entirely from animal studies (Yarrow, 2010). There is no study of the fixed combination.
In strength athletes several steroids at once lowered HDL and apolipoprotein A1 sharply. Six weeks after stopping the values had still not recovered (Hartgens, 2004). Long-term users show weaker heart pumping function (Baggish, 2017). In a prospective cohort every one of 100 users had at least one side effect (Smit, 2020).
Study results
What the trials measured
Interactive: switch tabs, tap points, show or hide arms. Arms are named relative to each other, no dosing advice.
How long levels stay raised after one injection7
Days (d) above the lower limit of the normal range, healthy men and men with hormone deficiency
LH stayed suppressed for as long as the level was raised. The enanthate dose was much higher than the two propionate doses, so the comparison shows ester and amount together.
Strength gain in 10 weeks1
Healthy men, weekly injection of testosterone enanthate or placebo, gain in kg
Trial with testosterone enanthate alone, not with the blend. The abstract gives no figures for the placebo with training group. Mood and behaviour did not change in any group.
Blood lipids under several anabolic steroids3
Change in percent, 19 strength athletes, self-chosen cycle over 8 or 14 weeks
Percentages calculated from the mean values in the abstract: HDL from 1.08 to 0.43 mmol/l, apo-A1 from 1.41 to 0.71 g/l, apo-B from 0.96 to 1.32 g/l, Lp(a) from 189 to 32 U/l. Six weeks after stopping the values had not yet recovered. Nandrolone decanoate alone did not change blood lipids in the second part of the study.
Pumping function of the heart4
Left ventricular ejection fraction in percent, experienced strength athletes aged 34 to 54
Cross-sectional study, users with at least 2 years of total use. Coronary plaque had a median of 3 vs 0, the longer the total use, the more plaque.
Research status
Where the research stands
There is no study on the blend or on trenbolone. The registry lists testosterone propionate only as a nasal spray or cream, not as an injection. Shown is the completed trial with the nasal spray. As of 26 Oct 2026. 9
- Preclinical Trenbolone: more muscle and bone mass, less fat in various animal species
- Phase 1 no registered trial
- Phase 2 no registered trial
- Phase 3 no registered trial
- Approval not yet
Show all 1 phase 4 trial on a timelineHide timeline
NCT04865562 · 30 participants, started Mar 2015, primary endpoint reached May 2016.
Registry entry ↗ · Results not yet in PubMed
Bar: start to primary endpoint (planned for running trials). Green = completed, blue = progress until 26 Oct 2026.
Side effects
- Prolactin: trenbolone can cause prolactin effects, with libido and erection problems. Add prolactin to the bloodwork.
- Lipids: HDL drops sharply and LDL rises. Trenbolone is considered especially unfavorable here.
- Blood pressure and heart: blood pressure and resting heart rate go up, endurance suffers. Measure regularly.
- Sleep: trouble falling asleep, restless sleep and night sweats are typical.
- Mood: irritability, restlessness and aggression are reported often.
- Estrogen and blood count: the testosterone share aromatizes, hematocrit rises.
- Other: suppressed hormone axis, acne, hair loss if predisposed, irritation at injection sites.
The upside of short esters: after stopping, side effects fade within a few days.
Tolerability
Frequency in the HAARLEM study
Out of 100 users, how many had the event. One cohort without a comparison group, participants chose compounds and amounts themselves.
| Event | All 100 users |
|---|---|
| At least one side effect5 | 100% |
| Lower libido after the cycle5 | 58% |
| Fluid retention during the cycle5 | 56% |
| Agitation during the cycle5 | 36% |
| Acne5 | 28% |
| Breast tissue growth (gynecomastia)5 | 19% |
Four participants had a serious event: heart failure, pancreatitis, suicidal thoughts and a flare of ulcerative colitis. One year after the start the observed effects were back at baseline. Effects typical of trenbolone such as sleep problems were not reported separately.5
Storage
Store at room temperature, in the dark and in the original packaging, out of reach of children. Do not put it in the fridge, because cold makes the compounds crystallize out of the oil. If you see crystals, warm the vial in your hand or in warm water and swirl until the solution is clear again. Disinfect the stopper before every draw.
