looking for info on how weekly T levels change with injections
- Thread starter geralt
- Start date
THE-DET-OAK
IncreasedMyT @ ULV
Last edited:
I see people say all the time that cyp and enanth have the same half-life and active life. This is incorrect. Cyp has about twice the half-life as enanth. Half-life of cyp is about 8 days and enanth is about 4 days. Product literature from the manufacturers and several studies can confirm this. I have confirmed it as well with my own blood tests (dozens of them) over the past few years.
It doesn't really matter for guys doing cycles as they normally inject twice a week with either ester, but for guys just looking to do testosterone replacement therapy (TRT) with one or the other and they want to do a true testosterone replacement therapy (TRT) of 100-200mg/week, cyp is preferred, unless you want to inject a small amount twice a week with enanth.
I'm not trying to sell you anything, I'm just stating facts so no need to be sorry. I've seen plenty of blood tests too. My own, in fact! And every single time my own blood tests support a half-life of ~4 days for test e, and about 7-8 days for test c. I've seen studies to support this too, as well as the ~8 day half-life for Cyp. I know it's not popular bro science, and contradicts a lot of what has been falsely parroted around the boards over the years, but it's true. You should have access to all this info though, right?
here's a study from pub-med that supports the 4 days half-life for Test E: Pharmacokinetics and pharmacodynami... [Acta Endocrinol (Copenh). 1990] - PubMed - NCBI
"Mean half-life estimates of the terminal elimination phase were 4 and 7 days for testosterone-enanthate and dihydrotestosterone-enanthate, respectively."
Here, I will give you this. A study that supports a 5 day half-life: http://www.eje-online.org/gca?gca=eje;132/4/514&allch=&submit=Go
"The TE injection resulted in highly supraphysiological levels of 100***8211;177 nmol/l from immediately after the injection to day 5. A rapid decline followed..."
But then you have this: http://www.drugs.com/uk/testosterone-enanthate-ampoules-cambridge-laboratories-spc-277.html
Which says, " Half-life in blood was 2-3 days (healthy male volunteers)."
I'll stick with the ~4 days though.
Last edited:
IMT staff
Official Sponsor
I'm not trying to sell you anything, I'm just stating facts so no need to be sorry. I've seen plenty of blood tests too. My own, in fact! And every single time my own blood tests support a half-life of ~4 days for test e, and about 7-8 days for test c. I've seen studies to support this too, as well as the ~8 day half-life for Cyp. I know it's not popular bro science, and contradicts a lot of what has been falsely parroted around the boards over the years, but it's true. You should have access to all this info though, right?
here's a study from pub-med that supports the 4 days half-life for Test E: Pharmacokinetics and pharmacodynami... [Acta Endocrinol (Copenh). 1990] - PubMed - NCBI
"Mean half-life estimates of the terminal elimination phase were 4 and 7 days for testosterone-enanthate and dihydrotestosterone-enanthate, respectively."
Here, I will give you this. A study that supports a 5 day half-life: Selected Abstracts
"The TE injection resulted in highly supraphysiological levels of 100***8211;177 nmol/l from immediately after the injection to day 5. A rapid decline followed..."
But then you have this: Testosterone Enanthate Ampoules (Cambridge Laboratories) (SPC) | Drugs.com
Which says, " Half-life in blood was 2-3 days (healthy male volunteers)."
I'll stick with the ~4 days though.
Im sorry but you didn't prove anything. Im not trying to start an internet war here but you show me a study on monkeys with no balls as your proof of a 4 day half-life? Even though it says 4-7.
In the second study your argument is thought to be solidified by " a rapid decline" I didnt know that was the definition for half-life.
On top of that you want to use your personal bloods as your proof of the 4 day half life?
I have seen a million blood tests, including my own, and its not 4 days.
The shortest it ever is is 5 days, but even though it reached those levels by day 5 they remained the same until day 6.
Please don't imply that I am parroting information, that is the furthest from the truth.
You are trying to create this big difference between Cyp and enanthate by playing with the numbers, the reality is though they are virtually identical and 99% of the people can not tell a difference, with labs or in how they felt.
At the most they are 2 days apart, after all there is a much bigger difference between prop and enanthate then there is enanthate and cypionate, some how you have twisted the numbers to make it look contrary to that ?????
levels don't even reach there peak until 2 days and they stay within 10% of that high for another day.
I was E myself and I would have to say it was closer to 5-6 days myself. 4 days no way.
It didn't say 4-7, it said, "Mean half-life estimates of the terminal elimination phase were 4 and 7 days for testosterone-enanthate and dihydrotestosterone-enanthate, respectively."
That "respectively" means the half-life for Test E was 4 days and the half-life for diyhdrotest e was 7 days. I showed a 5 day half-life study as well. I'm not sure how you get that I somehow think the definition of half-life is, "a rapid decline" though. But hey, you're not trying to start an internet war, right? No war here bro. I don't care if you don't believe me.
And yes, my own bloods support about 4 days - dozens of times. Why do you disregard them completely? You'd concede 5 though? OK. I can agree on 4-5 days, so I will go with 5. Done deal. Now we agree, so no worries.
I don't have to try to create the difference between the half-lives of TC and TE, it's already there. 4-5 days and ~8 days is about double the time. That could be considered big to some users. And yes, I've seen dozens of my own bloods to support that TC half-life, as well as product literature and studies.
The cool thing I'm getting from you is that I'm a 1%'er!!! Because I can totally tell the difference between TC and TE. I can even tell the difference in the injection site for a few days after the shot. For me, I get a small amount of PIP with TE, but not with TC.
And I didn't "twist" anything bro. I'm just reporting what I've read from product inserts, studies and what I've seen with my own blood tests. I have no need to twist anything. I've got nothing to gain from any of this. Not sure why you'd attack me like that. I'm not trying to start a war either. I didn't think I came across that way, but with the accusations you're hurling maybe I did? If I came across as attacking you personally, I am sorry. It was not my intention.
Like I said, for guys running cycles it won't make a difference with the large doses and twice weekly injections. For TRT...I'll take TC for the convenience of once weekly injections with slightly more stable levels (and no PIP).
Similar threads
