Which ones?: There are multiple p90x supplements -- from multivitamin to other products. From a scan of the multivitamin label, it looks like a decent product but does not provide enough vit d, and does not specify on the vit a how much is pre-formed and how much is in the form of beta-carotene. Whether the rest of their offerings are "effective" depends on what you're seeking & which products you mean.
Answered 1/4/2015
5k views
To be honest: Why focus on supplements when your time would be best optimized focusing on your overall eating habits/diet. Most people do not require supplements unless they are really focusing in on the performance aspect of training. You are better off focusing in on the P90X nutrition plan.
Answered 9/9/2018
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