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  1. #1
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    Test Phenylpropionate Half Life??

    My question is does anyone know the correct half life for testosterone phenylpropionate? I've read different things on it some suggesting that it's half life is almost equal to test prop, others suggesting that it's a slow releasing ester.

    I am more inclined to believe the second opinion because half life is dependent on solubility in oil which is determined by the number of carbon atoms the ester has......prop has 3 and phenylprop has 9, which would make it longer than cypionate (8 carbon atoms)

    I am thoroughly confused and would appreciate some input. Thanks

    Here's some of the info i found
    "Steroid esters

    Drug Active half-life
    Formate 1.5 days
    Acetate 3 days
    Propionate 4.5 days
    **Phenylpropionate 4.5 days
    Butyrate 6 days
    Valerate 7.5 days
    Hexanoate 9 days
    Caproate 9 days
    Isocaproate 9 days
    Heptanoate 10.5 days
    Enanthate 10.5 days
    Octanoate 12 days
    Cypionate 12 days
    Nonanoate 13.5 days
    Decanoate 15 days
    Undecanoate 16.5 days"

    "Testosterone Phenylpropionate: Chemical Formula C28H36O3
    Testosterone phenylpropionate is a slow-acting ester, with a release time of 1-3 weeks."

    "(Testosterone Phenylpropionate)
    4-androstene-3-one, 17beta-ol
    (Testosterone Base + Phenylpropionate Ester)
    Molecular Weight(base): 288.429
    Molecular Weight (ester): 150.174
    Formula (base): C19 H28 O2
    Formula (ester): C9 H10 O2
    Melting Point (base): 155
    Melting Point (ester): 20°C
    Manufacturer: Sicomed
    Effective Dose (Men): 350-1,000mgs/week
    **Active life: 5 days"

  2. #2
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  3. #3
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    I've read that one, i guess whats confusing is that it has the 9carbon atoms

  4. #4
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    I might just wind up looking it up in the PDR :/
    It seems like most sources have its Halflife at 5 days

  5. #5
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    have you ever run durabol? if so it's the same ester so youd run it the same way.

  6. #6
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    i have never ran npp

  7. #7
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    i had good results from it. I ran it with test e. took 2cc (1cc test e/1cc durabol) shots monday and thursday. So I'd just run it like test e.

  8. #8
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    Ok that sounds good thanks

  9. #9
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    no prob bro, check out the profile of npp in the profiles section though. I've been out of the game for a few years.

  10. #10
    Selene's Avatar
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    NPP is excellent, I have used many times. Doing injects every 3rd day to keep levels even in my body. then less chance of side effects that are unwanted

    good luck

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