A member asked:

Is the pre-workout supplement c4 bad for you?

A doctor has provided 1 answer

C4 pre work out: The main ingredient is creatine, which is not in itself harmful; it also contains caffeine and yohimbe, which can energize and promote tachycardia; other ingredients are generally safe ----- overall, is a safe product - don't overuse it or overdose - not safe then

Answered 1/15/2019

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A member asked:

Does the supplement C4 interfere with birth control?

A doctor has provided 1 answer