M-Sten Rx Information (Prohormones)

M-Sten Rx by

Manufactured by:
IronMag Labs

Serving Size: 1 Capsule
Servings per Container: 60

2,17a-dimethyl-17b-hydroxy-5a-androst-1-en-3-one - 10mg

Other Ingredients: Rice Flour, Magnesium Stearate, Stearic Acid, Silica.

Suggested Use: As a dietary supplement, take one (1) capsule twice daily with food.

From my research, 2,17a-dimethyl-17b-hydroxy-5a-androst-1-en-3-one seems to be an alternate nomenclature for 2,17a-methyl-5a-androsta-1-en-17b-ol-3-one (hence my double ingredient selection). Truth, I'm not really seeing a lot of info on this compound.

TunedSports, a great resource, also lists the compound as 2,17a-dimethyl-5α-androsta-1-en-17b-ol-3-one. I think it first showed up as Ultradrol in 2011.

Low: 4mg
Average: 8mg
High: 12+mg
This: 20mg
Cycle length: 3-4 weeks

Seems as though the community recommendation is that even experienced users don't go beyond 16mg daily, so a bottle recommended dosage of 20mg seems out of range, especially so given that it's considered a very strong compound that should be started at dose as low as 4mg a day (according to some resources).

Not a beginner compound.

Definitely want a perscription strength PCT for this.

Member Rating for M-Sten Rx
Strength (higher = better)Size (higher = better)
only members can rateonly members can rate
Current Rating: 8.0
Current Rating: 8.0
Cutting (higher = better)Sides (lower = better)
only members can rateonly members can rate
Current Rating: 4.0
Current Rating: 5.0
Overall Rating: 6.50 (higher is better)


From all my poking about, this seems to be an alternate nomenclature for Methylstenbolone.

2,17a-methyl-5a-androsta-1-en-17b-ol-3-one (Methylstenbolone)

An active and orally-bioavailable compound engineered to resist metabolic breakdown on both the A and D rings, precisely where other active hormonal molecules typically degrade into estrogenic or biologically-inactive metabolites.

Claims: Sperior pharmacokinetic profile and exceptional potency; does not aromatize into any estrogenic compound and has no affinity for the progesterone receptor, so estrogen and progesterone receptor mediated side effects are of no concern.

AKA methyl stenbolone, methyl sten, 17a-methyl-stenbolone, m-sten, ultradrol

In 1966, researchers at Searle Laboratories set about methodically testing the myotrophic (anabolic) and androgenic effects of a series of A-ring modified androstane derivatives. Compounds explored include
Methyl-1-testosterone (M1T), desoxymethyltestosterone (phera), 17a-methyl-1-androstenediol (Alpha One), and a variety of other 1- and 2-dehydro compounds were explored for activity.

The researchers announced that "Even the least active compound in Table 6 possessed a higher relative myotrophic potency than previously has been obtained with several clinically interesting compounds which have been studied under identical conditions, i.e. oxymetholone, oxandrolone, stanozolol, and methandrostenolone." (anadrol, anavar, winstrol, and dianabol).

Props to henryv, read the rest of his write-up at Total Flex Blog