What is Tren/Test/Mast Short 150?
Tren/Test/Mast Short 150 is a ready-made oil solution of three compounds with a combined 150mg/ml. According to the product listing each ml holds 50mg each of trenbolone acetate, testosterone propionate and drostanolone propionate (Masteron). One vial holds 10 ml and needs no mixing.
The combination is also known as TMT and, in a research context, aims at strength with a dry, hard look. All three esters are short, so the blend is given often in small amounts. Trenbolone was never approved for humans. The blend is nothing for beginners.
This information is for research and educational purposes only. No medical advice.
Comparison
The three components
Equal parts per product listing, all with a short ester. Tap a card to open the component's entry.
How it works
All three compounds bind the androgen receptor. Trenbolone is the strongest part, does not aromatize and also acts on the progesterone receptor. Drostanolone is a DHT derivative that does not aromatize either and is considered mildly anti-estrogenic, while testosterone provides the base for libido and wellbeing.
Propionate and acetate have half-lives of about one to three days. Levels rise quickly and fall just as quickly after stopping. That is why three doses per week are needed to keep levels from swinging too much.
Where it acts
Where the components act
Tap a point or a card. Grey = effect seen in trials.
- Heart and vessels
Systolic blood pressure higher, aorta stiffer, also in former users4
Observed in trials - Liver and blood lipids
LDL cholesterol higher, HDL cholesterol lower3
Observed in trials - Skeletal muscle
Fat-free mass and strength rose with the testosterone dose2
Observed in trials - Prostate
Trenbolone: less growth in organs with 5-alpha reductase than testosterone (animal data)1
Observed in trials - Mood
Agitation in 36 percent of users during the cycle5
Observed in trials
Targets in the ChEMBL database10
Compound CHEMBL1201048, CHEMBL1170, CHEMBL197309: two recorded mechanisms, type of action on each card.
- Gene
- AR
- UniProt
- P10275
- ChEMBL
- CHEMBL1871
- Action
- Drostanolone and testosterone: agonist, direct binding. Trenbolone binds about three times as strongly as testosterone
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 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
Trenbolone is described as a very potent anabolic with reduced androgenic and estrogenic activity; the data come almost entirely from animal studies (Yarrow, 2010). For testosterone a dose-response study shows that fat-free mass and strength rise with the dose while HDL falls in step (Bhasin, 2001). Drostanolone used to be an approved medicine, but modern studies in healthy people are missing.
Reviews and observational studies of steroid users show shifted lipids (Achar, 2010) plus lastingly higher blood pressure with a stiffer aorta (Rasmussen, 2018). In a prospective cohort every one of 100 users had at least one side effect (Smit, 2020). No study exists for the fixed three-way combination.
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.
Systolic hypertension on 24-hour monitoring4
Share of men doing strength training, cross-sectional study
Mean 24-hour systolic blood pressure was 132 versus 124 mmHg. The study looked at anabolic steroid users in general, not this blend.
Aortic distensibility on MRI4
Difference from controls in percent
Less distensibility means a stiffer aorta. The difference also showed in former users. The natriuretic peptide MR-proANP was lowered in current users.
Fat-free mass after 20 weeks2
Gain in kg in the three higher of five dose levels, study with testosterone enanthate
HDL cholesterol fell in step with rising testosterone levels. There is no such human study for trenbolone or drostanolone.
Research status
Where the research stands
There is no study on the blend itself. The registry also has hardly anything on the components: no trial with trenbolone or drostanolone, none in phase 2 or 3 with testosterone propionate. As of 26 Oct 2026. 9
- Preclinical Trenbolone: receptor assays and animal models
- Phase 1 no registered trial
- Phase 2 no registered trial
- Phase 3 no registered trial
- Approval not yet
So far there is no registered trial in humans. 9
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 and drostanolone are both considered 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 of the tren share.
- Mood: irritability, restlessness and aggression are reported often.
- Skin and hair: as a DHT derivative drostanolone favors hair loss if predisposed, plus acne and oily skin.
- Hormone axis: your own testosterone production is suppressed.
The upside of short esters: after stopping, side effects fade within a few days.
Tolerability
Side effects in anabolic steroid users
Out of 100 anabolic steroid users, how many had the event. Observational study with all agents, not a study of this blend.
| Event | Anabolic steroid users (all agents) |
|---|---|
| Lower libido after the cycle5 | 58% |
| Fluid retention5 | 56% |
| Agitation5 | 36% |
| Acne5 | 28% |
| Gynaecomastia5 | 19% |
Every one of the 100 men had at least one side effect, four had a serious event (heart failure, pancreatitis, suicidal thoughts, flare of a bowel inflammation). One year after the start the observed effects were back at baseline.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.
