ICL
critic
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Just because I made this guide does not mean you need to follow it or join it. Only for those who are considering TRT before this thread, I just wanted to spread out some information because it can be useful. Never replace forum information for medical advice from professionals, I am simply sharing the findings from other professionals.
For all the youngcels:
Everyone is like "Inject testosterone bro it gives bonemass" while knowing that their audience is like 13. Great way to fuck your body forever, because a lot of you guys seriously dont know what you are doing, just injecting anything that the big influencers say. It took me 7 months to finalize my opinion in this field of pharmacology, while you guys hop on instantly. Beware
For all the youngcels:
Everyone is like "Inject testosterone bro it gives bonemass" while knowing that their audience is like 13. Great way to fuck your body forever, because a lot of you guys seriously dont know what you are doing, just injecting anything that the big influencers say. It took me 7 months to finalize my opinion in this field of pharmacology, while you guys hop on instantly. Beware
Contents:
1. What is an ester?
2. Usage
2.1. Types of esters
2.2. Relevancy to cycles + TRT
3. Conclusion
What is an ester?
An "Ester" is an oil modified to make the half lifes of testosterone products vary [its more than that, but we will focus on testosterone], and there are multiple types to it.
Concepts you should remember:
The ester has a different thickness and type for each one. This is how they have a different half life; the thicker oil takes more time to break down by the enzymes produced endogenously by the body, resulting in the different half life. Mainly this is measured by the amount of hydrocarbon chains
The biology of the ester is very important as it can decide how the injection is done.
subcuitaneous injections absorb all of the oil. This means that you get all of what you injected. This is more stable since the body breaks it down longer leading to more stable levels of testosterone. However, this hurts very much, especially with thicker oils. so only use subcuitaneous injections for oils that arent thick.
Intramuscular injections absorb all of the oil too, however, they are less stable in terms of maintaining testosterone levels as it gets absorbed quicker and breaks down easily, leading to more spikes, which lead to more aromatization. However, intramuscular injections have less post injection pain [PIP], which means it is great for absorbing thick oils like undecanoate and cypionate.
We will use half life for how long it lasts. After half life ends, effects are minimal
The relevant esters and how they compare
Cypionate [C]:
Half life 7-8 days, injection frequency 3.5-7 days
stability: Excellent, testosterone levels stay stable for a long time - very convinient, very flexible, you can safely change the dose without much worries. Cost is average, available almost everywhere. Used most for TRT. Paired with HCG usually, thick oil
Ethanate [E]:
half life 5-7 days, injecetion frequency is the same as cypionate, and pracically everything else is almost the same with C. Cost is better than C, less thick than it.
sustanon 250 [BRANDED NAME, so i will call it sust]:
Half life is not definitive, it is a multi-ester testosterone solution, made for trt. Contains four different testosterone esters in one vial, that is usually 250mg total:
Test propionate (30 mg) – short half life
Test phenylpropionate (60 mg) - in between
Test isocaproate (60 mg) - in between
Test decanoate (100 mg) – longest half lief
Half life is usually 15 days, it gets a quick spike from the propionate, while the decanoate keeps its half life long, and the other elements are to make sure testosterone doesnt fluctuate. Tooken E3D [Every 3 days] to E5D.
Good stability, but less than C and E. Convenient but less than C and E. It isnt that flexible due to the fact that the doses are right there given for you, you usually find 1 vial type sold but nevertheless it is the cheapest option mostly.
This is mostly used in cycles. Very reliable, many people on Meso use it.
Testosterone Undecanoate :
Very long half life, practically 1 month. injected every 10 weeks or so, with very high doses like 1 gram due to its infrequent injections. The most convenient, technically due to the fact that it is long lasting. stability is good but worse than sust. Very strict dosing, its harder to find, and you cannot change the dose easily. Thickest oil
Testostereone Propionate [P]
1-2 days half life, injected ED [every day ]or EOD [every other day]. Mildly inconvenient, it is easy to hop off as it fully clears in 4 days [not just the half life but the full life], but you must not miss your doses. Effects are possibly the best on this one, the aromatization is almost unheard of, it flattens your testosterone levels and sometimes even microdosed by some people. Also, effects come in way quicker compared to other esters, even taking days to appear.
This is only usable in a cycle. Would you seriously inject testosterone every single day for the rest of your life? Obviously not.
It also seems to have sharp pain when injected and causes visible scarring if you dont consistently change injection sites. Its good for Blasting n' Cruising [A term in the bodybuilding community where you hop off trt and instead do a cycle with a much higher dose then drop back to trt after cycle is done]
some relevant information and conclusion
Testosterone esters have weight to it. so that means not everything gets absorbed. Compare 100mg of testosterone used with different esters BY GROK.
Approximate Active Testosterone per 100 mg of Esterified Compound
These are standard figures from pharmacology sources, bodybuilding references, and clinical discussions (minor variations exist due to exact measurements, but they're widely accepted):
Testosterone Propionate (Test P): ~80 mg active testosterone (ester ~20%)
Testosterone Enanthate: ~70–72 mg active testosterone (ester ~28–30%)
Testosterone Cypionate: ~69–70 mg active testosterone (ester ~30–31%)
Testosterone Isocaproate (in Sustanon): ~72 mg active
Testosterone Phenylpropionate (in Sustanon): ~66 mg active
Testosterone Decanoate (in Sustanon): ~62 mg active
Testosterone Undecanoate: ~61 mg active testosterone (ester ~39%)
For Sustanon 250 (250 mg total esters per ml):
Breakdown: 30 mg propionate + 60 mg phenylpropionate + 60 mg isocaproate + 100 mg decanoate
Approximate active testosterone per 250 mg injection: ~175–180 mg (blend averages ~70–72% active, similar to enanthate/cypionate overall)
Conclusion: Draw it yourself, a post of a random incel does not beat research and medical advice. Dont be stupid, dont be retarded, and please do not fuck up.
