CL Answers

Is P-5-P really better than "regular" vitamin B6?

Learn more about pyridoxal-5-phosphate (P-5-P) and vitamin B6.

I've read that the best form of vitamin E is d-alpha tocopheryl succinate (it's recommended in the paleo diet, for example), but I don't see that listed on product labels. How can I find it?

Learn more about the different names and types of vitamin E, including d-alpha tocopheryl succinate, natural and synthetic.

I started taking red yeast rice and soon after developed insomnia. Could my red yeast rice supplement be the problem?

Does red yeast rice make you tired and cause insomnia? ConsumerLab explores this question and other red yeast rice questions. Learn more at ConsumerLab.com.

Is there a difference between taking vitamin D in the dry form versus the oil capsules? Is one better than the other?

Learn more about how to take vitamin D, the best form to take and the best time of time day to take vitamin D.

Is it safe to take CoQ10 while taking blood thinners like warfarin or Plavix (clopidogrel)?

Learn more about the possible counteractive effects of CoQ10 and blood thinners, including safety.

Can turmeric or curcumin with black pepper extract cause constipation? I had this problem, but it resolved when I switched to a curcumin supplement without piperine (black pepper extract).

Learn more about black pepper extract, why it is added to turmeric/curcumin supplements, and if it can cause gastrointestinal effects.

Does Carditone work to lower blood pressure?

Carditone information, including safety and side effects, whether Carditone has been shown to work for blood pressure and angina, and more.

What is graviola? Can it really help fight cancer?

Learn more about graviola, if it can really help fight cancer, and its safety.

Is the probiotic "Milk Test," as described on many websites, really an effective way to test the quality of the bacteria in probiotic supplements at home?

Is the probiotic "Milk Test" an effective at-home test of the quality of the bacteria in probiotic supplements?

Can taking CoQ10 affect my thyroid levels or interact with my thyroid medication?

Learn more about CoQ10 and thyroid medications along with natural thyroid function. ConsumerLab.com's answer explains.