After reading many well written and very helpful stickies (e.g., Austinite's benchmark "My First Cycle..." piece) and other threads on this site that outline simple test E cycles followed by PCT (i.e., clomid + nova), the overall consensus is that PCT should begin once the exogenous test E has substantially left the user's body. The amount of time this actually takes varies a bit based on who you ask but by and large it's recommended that PCT should begin 14 - 21 days after the last test E injection, with most recommending 14 days.
Based on the half life of Test E, I don't see how 14 - 21 days is nearly enough time for Test E to substantially leave a user's body. Based on the calculations below for a typical 500mg/wk Test E cycle, one should wait almost 40 days (about 5 weeks) if they expect exogenous Test E levels remaining in their body to drop down to less than 100mg.
First, the documented half life of Test E is about 10 days. Second, let's assume a standard test only cycle of 500 mg per week of Test E for 12 weeks where injections are administered once a week. Based on this, the below table shows in mg the amount of Test E still remaining in the user's body as a function of time after each injection:
Day 1 Day 8 Day 15 Day 22 Day 29 Day 36
Inj. 1 500 315 198 125 79 50
Inj. 2 -- 500 315 198 125 79
Inj. 3 -- -- 500 315 198 125
Inj. 4 -- -- -- 500 315 198
...
...
Total 500 815 1013 1138 1217 1267
Thus, as an example, at day 22 there would be about 1,138 mg of Test E left in the body comprised of: 125mg remaining from the 1st injection administered Day 1, 198 mg remaining from the 2nd injection administered Day 8, 315 mg remaining from the 3rd injection administered Day 15, and finally 500 mg remaining from the freshly injected 500 mg.
If the above table were continued through to the start of week 12 (i.e., Day 78) the total amount of Test E left in the user's body would cap out at about 1345mg. If PCT were started just 14 days after the week 12 injection (i.e., PCT is started Day 92) then there should still be about 510mg of Test E left in the user's body. After 21 days (i.e., Day 99) there would be about 314mg left. Based on the math, it appears that it would actually take about 38 days for the levels to reach about 100mg.
This presents the following questions...
1) Is the standard 14 day wait to begin PCT too short? Should people be waiting longer to clear out the long ester test in their systems?
2) If not, and the standard 14 - 21 days is still appropriate then should we conclude that PCT is still very effective despite having about 500mg of test E residing in one's muscle tissue?
Any and all thoughts on all this are much appreciated.
Based on the half life of Test E, I don't see how 14 - 21 days is nearly enough time for Test E to substantially leave a user's body. Based on the calculations below for a typical 500mg/wk Test E cycle, one should wait almost 40 days (about 5 weeks) if they expect exogenous Test E levels remaining in their body to drop down to less than 100mg.
First, the documented half life of Test E is about 10 days. Second, let's assume a standard test only cycle of 500 mg per week of Test E for 12 weeks where injections are administered once a week. Based on this, the below table shows in mg the amount of Test E still remaining in the user's body as a function of time after each injection:
Day 1 Day 8 Day 15 Day 22 Day 29 Day 36
Inj. 1 500 315 198 125 79 50
Inj. 2 -- 500 315 198 125 79
Inj. 3 -- -- 500 315 198 125
Inj. 4 -- -- -- 500 315 198
...
...
Total 500 815 1013 1138 1217 1267
Thus, as an example, at day 22 there would be about 1,138 mg of Test E left in the body comprised of: 125mg remaining from the 1st injection administered Day 1, 198 mg remaining from the 2nd injection administered Day 8, 315 mg remaining from the 3rd injection administered Day 15, and finally 500 mg remaining from the freshly injected 500 mg.
If the above table were continued through to the start of week 12 (i.e., Day 78) the total amount of Test E left in the user's body would cap out at about 1345mg. If PCT were started just 14 days after the week 12 injection (i.e., PCT is started Day 92) then there should still be about 510mg of Test E left in the user's body. After 21 days (i.e., Day 99) there would be about 314mg left. Based on the math, it appears that it would actually take about 38 days for the levels to reach about 100mg.
This presents the following questions...
1) Is the standard 14 day wait to begin PCT too short? Should people be waiting longer to clear out the long ester test in their systems?
2) If not, and the standard 14 - 21 days is still appropriate then should we conclude that PCT is still very effective despite having about 500mg of test E residing in one's muscle tissue?
Any and all thoughts on all this are much appreciated.
Reassessing Appropriate PCT Start Time for Test E Only Cycle: A Mathematical Approach
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