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What’s your experience with primo?

meat&potato

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Mar 17, 2026
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I’ve been running 450 primo, 750 test, and 10iu GH for a few months now and have had tremendous results. Pip is a bitch sometimes but the 150mg solution is tolerable. Whats your two sense on primo, pip, and dosages. Just did bloods and I’m lookin solid. Going to continue blast. Everything in normal range, 51 hematocrit, 580 igf-1, 2337 total test.
 
I just use it on my old man cycles. Low dose and i am happy with the results. Even when added to my TRT with 100mg/week of primo more people including my Dr make comments that i must be training more.
 
I'll be the contrarian here.

I think Primo is overpriced and over hyped.
I used it way back in 89-90 when amps where easy to get, along with Parabolan. I tried it again a few years ago. Not impressed at all.

Nothing unique in my experience despite what others have reported. Maybe I'm the outlier - after all I'm the guy that likes nandrolone more than test.

It's relatively weak per ml, so unless you use large doses, which I am not fond of in general, you're not going to get much.

If a client has used it and liked it I won't dissuade them, but I don't use it.
 
I'll be the contrarian here.

I think Primo is overpriced and over hyped.
I used it way back in 89-90 when amps where easy to get, along with Parabolan. I tried it again a few years ago. Not impressed at all.

Nothing unique in my experience despite what others have reported. Maybe I'm the outlier - after all I'm the guy that likes nandrolone more than test.

It's relatively weak per ml, so unless you use large doses, which I am not fond of in general, you're not going to get much.

If a client has used it and liked it I won't dissuade them, but I don't use it.
I’m not sure about it just yet. The pip on 150mg 3xweek is a bit annoying. Are you more leaning towards mast as its comparator? I have some on hand and was gonna run it in the next year? Haven’t run nandro yet but still young. Just getting into my bigger cycles (27yr old)
 
I’m not sure about it just yet. The pip on 150mg 3xweek is a bit annoying. Are you more leaning towards mast as its comparator? I have some on hand and was gonna run it in the next year? Haven’t run nandro yet but still young. Just getting into my bigger cycles (27yr old)
Mast is closest as a compound.

That said I'd ask you what your goal is in using these choices?

Set the goal first, then line up what tools you need. If it's adding raw strength and the size that comes with it, nandrolone or more test is superior.

If you aromatize easily and want to avoid adding an AI or SERM, then primo, mast or EQ is a better choice.

I always make sure people articulate why they are making the choices they are. Then we can better understand what to use, how, and when.

Note I'm coming at this via the lense of a potential or current competitor, so keep that in mind.
 
Makes me rounder than EQ and made me look stupid full and striated alongside mast and var. Running that same blast but with EQ now and it’s not the same
 
Absolutely crushes my E2 and turns me into an insufferable prick within a few days. Which doesn’t even really make sense because of the ester. I am a low aromatizer.

I’m good with not being able to run it though, shit is expensive.
 
I much prefer EQ. I actually feel much better on EQ than primo. I think the well being people report on primo is overstated and largely placebo. Gains wise I was not impressed. Maybe if cost was considerably less I would use it here and there.
I am also not clear as to how people came to the conclusion that primo causes no deleterious health issues. It’s not like there are many studies on the drug.
 
I used to say the same thing as many of you about Primo — that it’s weak, overpriced, and not worth using.

Now, speaking for myself, I actually love it. For clients I rarely use it, mainly because of the cost and the fact that you can easily replace it with other compounds.
But for me, it’s something I can run in relatively higher doses almost year-round without any negative effects.
So for my own use, it’s a great compound, especially now that I’m no longer trying to be the biggest freak on the planet 🤣
 
The look that Primo gives is nice, and ofc you pay for that, tbh you can look good with whatever drugs so I won't invest much on it.

On a growth phase/all year long I prefer EQ and a max 200 Deca/NPP (just for joints since I am old) but that's just me.
 
Enjoy the Look Primo brings me but yeah don’t seem to get much growth out of it.
 
Never really had pip from it. At a 1:1 ratio with test, it crushed my E2. 2:1 seems to be the sweet spot for me. No obvious effects on mood or gains. Plan to try bold cyp next round.
 
Great drug for me. Gives a nice round full look and zero side effects from it even in larger doses, and I've never had PIP from it.
 
Primo is great to run year round - winter even more cause it boost your immune system as far as I am aware. This is the cleanest drug next to testosterone you can get. It takes time to build up but once you see how amazing it is you want to run it all the time. If legit Rimabolan 300mg is good but 400 is even better- for me it was sweet spot and i ran a lot real primo in a past. In fact primo next to test is the drug i used THE most from all of them so i know things or two about it. Primo loves high protein so 1.5g/lbs is what you want when you ran primo. Take 400-600mg and go for 12-16 weeks or longer. On a side note- to appreciate this compound single digits bf is when primo shine.
 

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