Titanium Gear Industries (domestic source)

Something about PWO.

Some ingredient in it actually closes off blood flow or restricts the size of the vessels. Isnt that bad for muscle growth? Basically the arguement I heard was PWO are bad for overall growth, only good on days you are going for PR's

any truth in this?

The benefits far outweigh any negatives of vasoconstriction, and seeing as any good pre will have several vasodilators - stimulant vasoconstriction is a moot point.
 
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