Anyone know roughly the mg per week of test taking externally that causes full shutdown? I thought I read somewhere a dose of like 20mg per week would only partially suppress natural production as in, your body no longer produces what that 20mg gave you, but still produces what it needs.
Once your body starts seeing exogenous test it will shut down. If you inject too little as the 20mg/wk you are are referring to then you would prob be in a worse situation than if you injected none.
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I could have swore i read somewhere it causes suppression of LH and FSH at a certain % x amount of days after injectionā¦ ie 40mg caused 74% suppression and 125mg 100% total suppression
That may be true in a one shot situation.
What are you trying to do?
trying to see if tapering test really worksā¦ some people swear by itā¦ like as in as you are getting to sub 50mgās a week ie 20-30mg once per week, your body says hey i see some but not enough test and slowly reactivates lh and fsh stimulation
Iām no expert in this arena but itās doubtful.
@anon18050987 you got anything on this?
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Your best bet is to find one of those studies that used different doses, like 25mg, 50mg, 125mg, 300mg and 600mg. Go to the smallest dose, 25mg, and in the data see if they checked for LH/FSH. Those studies are usually 12-16 weeks long. If LH/FSH are at or near zero, then that proves that even the smallest tested dose of testosterone causes HPTa shutdown.
Like this one:
Only I know there are studies using lower doses than 125mg. But this shows that LH/FSH were suppressed for 6 weeks after last injection.
Edit:
From the study: After the 125 mg dose, LH decreased by 65% and 35% on Days 4 and 14, respectively, and the corresponding values for FSH were 45% and 38%, respectively.
After a single dose, LH production dropped by 65% by day 4
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Boom! This is what I was looking for:
LH (U/l) (overall ANOVA P = 0.8054)
25 mg 3.5 Ā± 0.4 0.3 Ā± 0.1 ā3.2 Ā± 0.4
25mg of Testosterone Enanthate for 20 weeks, LH measured before first injection and at week 16. You can see it went from 3.5 to .3, from 25mg of testosterone weekly.
Itās also important to note that TT at this dose was DECREASED from 593ng to 253ng, so they were technically hypogonadal and LH still didnāt respond to the low TT levels (and assumed low e2 levels) while the exogenous test was injected.
Hereās the full study:
https://journals.physiology.org/doi/full/10.1152/ajpendo.2001.281.6.E1172
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So in other words, tapering is pointlessā¦ and I will be shutdown regardlessā¦ lol
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Yes, and for virtually no gains whatsoever at that.
Thoughts?
ā¦ on what, a thread thatās been unattended for 17 yearsā¦?
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it seemed to work though and people said it worked better than a typical pct.
Youāre digging through mountains of reports saying to do a typical PCT to regain HPTA function, and finding the one or two experiences saying to do something differentā¦ youāre not a unicorn, youāre not special.
If you want to retain the most HPTA function, include HCG in your TRT protocol. Or better yet - donāt TRT at all.
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At the end of the day, studies and calculations are nice but every individual is different. The only way to know foe sure is to start your protocol and get bloodwork done periodically to see how the body is responding
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Well by all means ignore the science and go with reports of āpeopleā on the internet lol.
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