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Is Jack3d (or any other Pre-Workout Supplement) Safe?– UPDATED

** Updated with DOD (Department of Defense) warning below.
As Grandpa’s old saying  goes, “Where there’s smoke, there’s usually fire”. In this case, we’re talking about pre-workout Supplements like Jack3d and C4, which because of their stimulant and chemical properties tend to come with their own built-in controversy. While there’s various ingredient combinations found in Pre-Workout …

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Review: Jack3d (USB Labs)

Pre-Workout Supplements are the hotness. With the promise of “vascular pumps”, rep-destroying energy and muscle growth beyond your wildest dreams, it’s no wonder. But all the marketing hyperbole aside– do they work? I’ve sampled two over the last six months or so… BSN’s N.O.-XPLODE and USP Labs Jack3d. So what’s the deal with ‘em? To …