Mast Prop now Mast-E is basically dead, does the short ester actually deliver the same look?

6 posts · started by BERLINER · Jun 25, 2026

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BERLINER
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BERLINER
539 posts · joined Sep 2016
#1
Ran Mast-E on my last 3 blasts and loved what it did for the dry hard look, but its basically gone from production now and I cant get hold of it anywhere. Everyone keeps telling me to just switch to Mast Prop but im not sure the shorter ester delivers the same thing or if its a different experience altogether. Is the hardening and drying the same, or does the EOD pinning change how it feels in practice? Anyone actually made the switch and noticed a real difference, or is it the same molecule and im overthinking it. Cheers.
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Beantown Rick
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Beantown Rick
582 posts · joined Jun 2016
#2
Mast prop is the exact same drostanolone molecule as mast e, just a shorter ester so youre pinning EOD instead of twice a week, the hardening and drying is identical at the same weekly dose. Only thing worth saying is it only shows when youre already lean, run it at 15 percent bf and youll see nothing and just waste the money. It competes with aromatase a bit too so dial your AI back when it goes in or you can crash your e2. If youre already pinning test p EOD the schedule is no extra hassle, thats really the only downside switching off mast e.
BIGDADDY
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BIGDADDY
2,554 posts · joined Jan 2015
#3
Mast E has been hard to keep in stock with the raw situation upstream, that is the honest reason it has thinned out. Mast prop is the exact same drostanolone doing the same job, only real difference is the EOD pinning. We are working on getting Mast E back on the shelf, bear with us.
MTS Support https://support.med-tech.pro
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SydneyFit
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SydneyFit
129 posts · joined Mar 2020
#4
Ran Mast-E for years and switched to the prop when the E went out of stock, honestly the look is identical because it's the same drostanolone molecule, just a shorter ester. Only real difference is you're pinning EOD instead of twice a week. If you're already on Test P EOD it slots right in with no extra hassle. One thing worth saying, the hardening only shows when you're already lean, at any real body fat you won't see a thing from it so save it for the back end of a prep.
GODZILLA
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GODZILLA
1,186 posts · joined Mar 2017
#5
Solid breakdown above. Only thing to add is the drostanolone molecule is identical between the two, the ester just changes your pinning schedule, so do not expect a different look from prop, expect the same result on an EOD jab. If you are already pinning prop EOD the switch is a non issue.
MTS Support https://support.med-tech.pro
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FrankfurtFit
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FrankfurtFit
802 posts · joined Jun 2015
#6
Same molecule, the only real difference is you are pinning EOD instead of twice a week. The drostanolone itself is identical so the hardening and the anti estrogen effect are the same at the same weekly dose, do not overthink the ester swap. One thing worth flagging, when you add mast your test aromatises a bit less so you usually need to pull your AI dose back, a lot of guys crash their e2 chasing the same adex they ran without it. And do not bother running it unless you are already lean, at 15 percent body fat it does nothing visible no matter the ester.
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