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  1. #1
    Registered User Realityy's Avatar
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    Is caffeine a vasodilator or vasoconstricter?

    I've been googling and I keep getting different answers. So what's the deal?

    I have a feeling caffeine has been inhibiting my vascularity. Normally I'm quite vascular and add in some pump ingredients and it really shines, but whenever I take a pre with caffeine I think it reduces it some what. Now I'm very stim sensitive because I don't take caffeine at all (no coffee etc), so caffeine is new to me per say.

    I read on wiki that caffeine has a pressor effect (vasoconstriction) on people who are not used to it
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  2. #2
    Registered User Squatticus's Avatar
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    as far as i know its a vasoconstricter
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  3. #3
    1 Cheeky Kunt m8 Mxxz's Avatar
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    the more you take the more effect it will have on constricting vascularity. usually go alright with craze it only has 80mg caffine per scoop, throw in agmatine + a nitrate and some L-Norvaline and your gold
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  4. #4
    ISOFLEX'D xStevenx's Avatar
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    It is a constrictor...what is your concern? Want more vascularity?

    IMO if you are not abusing it, it will not have much effect on vascularity per say. I can take 300mg of straight caffeine and still veiny as hell.
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  5. #5
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    Originally Posted by xStevenx View Post
    It is a constrictor...what is your concern? Want more vascularity?

    IMO if you are not abusing it, it will not have much effect on vascularity per say. I can take 300mg of straight caffeine and still veiny as hell.
    I'm in with Steven on this one, usually vascularity can be a result of your diet, have you changed that at all. Have you been eating lower carbs or changed your fats around? This can all have an effect as well, or maybe your holding. Little subcutaneous water from creatine, just all possible scenarios.
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  6. #6
    ISOFLEX'D xStevenx's Avatar
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    Originally Posted by bodybuilder03 View Post
    I'm in with Steven on this one, usually vascularity can be a result of your diet, have you changed that at all. Have you been eating lower carbs or changed your fats around? This can all have an effect as well, or maybe your holding. Little subcutaneous water from creatine, just all possible scenarios.
    Yea vasc has A LOT to do with body fat levels, genetics, and diet. If those are not in place....no supplement will blow your mind with vasc.

    you may see some improvement but eh whatever
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  7. #7
    evidence based poster Terrimonas's Avatar
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    Caffeine and its metabolites can be either net vasodilatory or vasoconstrictive depending upon concentrations, the particular local tissue receptor makeup, local metabolic conditions, etc...
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  8. #8
    Registered User aaronuconn's Avatar
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    Vasodilator.
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  9. #9
    the dene of Tyler44's Avatar
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  10. #10
    evidence based poster Terrimonas's Avatar
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  11. #11
    ★ ★ ★ ★ ★ powercage's Avatar
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    Its often a peripheral vasodilator along with its central vasoconstriction
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  12. #12
    Tachyphylaxis King PuZo's Avatar
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    Neuron posted the explanation years ago. I believe that it is a vasodilator during exercise due to whatever calcium donating molecules.. on phone so cant search
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  13. #13
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    It's a vasodilator in skeletal muscle tissue, especially during intense exercise
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