Data shows Nandrolone aromatizes between 10 and 25% the rate of Testosterone.
Too little estrogen causes many issues, ED among them.
Too much estrogen also causes issues, ED among them.
Evidence shows that Nandrolone increases Prolactin (in mammalian models), though anecdotal experiences can conflict with this. Varies individually(?)
Anecdotal evidence says that Nandrolone causes increased sensitivity to estrogen. So if one were previously fine with e2 as high as 50 pg/mL (arbitrary number), this may still cause issues. Possible interaction between Estrogen and Prolactin(?)
B6 (P5P) should be taken to mitigate potential Prolactin issues.
Conventional bro science has said to run Test at 2x the dose of Deca, but this doesn’t make sense due to elevated estrogen sensitivity.
Old tales of bodybuilders running solo Deca at high doses have no mention of Deca Dick, often the opposite… Why?
The same old tales often speak of running Deca/DBol cycles without issues. DBol is known to have a high conversion rate to Estrogen, which could be somewhat counteracted by Deca. I think this aligns with theories below.
Theories:
If running solo Nandrolone, dosage needs to be high enough to allow sufficient estrogen. Considering 10-25% estrogen conversion rate, 800mg/wk Deca would convert at a rate similar to 80-200mg/wk Testosterone.
If adding Nandrolone to Testosterone, seeking the lowest dose of Testosterone which still provides sufficient Estrogen and DHT, would make sense. We’ll call this the “Test Base”.
Once Test Base is established, one could theoretically push Nandrolone as high as they wanted and wouldn’t necessarily have to worry about getting Deca Dick.
Nocebo (placebo for negative side effects) is powerful. With the internet, almost everyone thinking about using Deca has googled it, and seen that as a side effect. Any changes in sexual function are then attributed to the Deca.
I don’t doubt some guys do get Deca dick, but I do think a lot of it is just more access to information. We see this with many different drugs or treatments.
These are the problems of the past. As people who know what they are doing are no longer cycling for decades. Always being on some dose of test counters many steroid side effects people are still stigmatized to.
There are a ton of theories out there about the causation with little to no solid conclusions being drawn. My personal opinion is that no amount of Test, Mast, Proviron or any other adjunct/base to Nandrolone will prevent ED if you are prone to it. I’ve run it in as little as 150mg/wk, prescribed, along side my TRT and still got it. It didn’t feel like high or low E2. It feels like a mental disconnect with pleasure centers as a result of the drug. Literally felt nothing below the waist. I think its a roll of the dice my friend. You can research it all you want but you will be taking that spin on the wheel of chance.
What was your TRT dosage when running Deca?
Did you ever need AI at this TRT dose (without Deca)?
This sounds prolactin related. After ejaculating, Prolactin spikes - making your dick go soft, or at least desensitizing it and making it harder to stay hard. Does this sound similar to how you felt, except without being post-nut?
Do you think you are prone to high prolactin?
Any chance you ran B6/P5P/Cabergoline alongside this?
I did not have high prolactin. Yes I understand how it works though as you alluded to post coitus. My labs actually didn’t change all that much from the small Nandrolone dose. I was on 140mg Test and 150mg Nandrolone both long esters. I have run high Test and high Nandrolone, high Test and low NPP, and TRT doses of Test with low Nandrolone … all the same. It also gave me weird mental sides such as anxiety and jealousy. Its just not for me.
Like @blshaw suggested, I don’t think we’ll ever get a clear answer to what causes deca dick. There are a host of theories, and almost each refute the other (i.e. high test/low deca, low test/high deca). Everyone has an opinion but nothing to really back up their claim.
I’m currently running:
Testosterone Cyp 320mg/wk
Deca 700mg/wk
Masteron 200mg/wk
Going into week 16, (final week), gotten stronger, bigger and my libido is normal and dick is working fine.
I take 0.25mg caber 2x week. It helps with the libido but I could get along without it. I took 0.5mg 2x/wk but that made me fatigued and nauseous so dialed it down.
Overall, the experience has been fine, no mental fuckeries, estrogen issues, nothing out of the ordinary.
The caber and mast may have helped with the libido part, but there’s no guarantee that’s the case. It’s basically a roll of the dice. Some do fine, some have issues. It’s all individual.
No test out using base test dose of 300 test and run 400 deca 300 primo see if that fixes my deca dick cuz my dicks only working sometimes less feeling like i gotta get really into it for my shit to stay up.
Currently on 500 test 300 deca 300 primo and if i can lower my e2 cut out 1.25 arimidex to .75 a week would be great hate ai also fucks up my libido very easily hate using them but if i just use 300 test base and run deca 400 mybe 500 and then 300 primo cuz i hear helps with deca dick and i dont like getting super bloated so offset bloat a aswell lil bit see if that works cuz deca dick is only thing makin this cycle suck whats point being jacked if you cant fuck.
Update on deca dick and experiment fixed mu issue it was nandrolone acting weird with test aromatizing Lowered test E to 200 then ran NPP 500 and ran 350 primo almost eliminated the use of an Ai will now always run test base at 200 cuz nandrolones act weird with test aromatizing and the constant Ai higher dose was fuckin my dick up also now deca dick pretty much non existent if your high aromatizer i recommend run test low and deca/NPP high then try to use dht to mitigate e2 without an Ai asmuch as possible i berly use .25 arimidex once mybe twice a week now and feel way better now.
The above poster is half correct here,
Deca dick is not caused by estrogen although very high estrogen can give you erection issues.
Deca dick is caused by an unbalance of DHT and DHN which happens when you take nandrolones. . In order to avoid DD you need to add in a DHT derivative like proviron from the start.