CL Answers

Is it okay to take a zinc supplement while I am on an antibiotic for a respiratory infection?

Does zinc interfere with the absorption of antibiotics? Learn more about this and other effects in the body.

I heard somewhere to avoid chocolate with "processed with alkali" in the ingredients. Is that true?

Learn more about cocoa processed with alkali ("dutched") and its effect on flavanols.

I drink organic milk with added DHA Omega-3, but it is expensive. Is it worth paying extra for the added DHA?

Find out if drinking organic milk with added DHA omega-3, such as Horizon Organic Milk, is worth paying more.

How much caffeine is really in dark chocolate bars?

Just how much caffeine is really in chocolate bars? Get our test results on the caffeine content in dark chocolate and cocoa powder.

Is it better to take fish oil, flaxseed oil -- or both?

Fish oil and flaxseed oil -- how they are different, what they are used for, if and how they can help with arthritis, depression, lowering cholesterol & more.

Is it true that NAC can help clear nasal passages?

Find out if N-Acetyl Cysteine (NAC) can help with post nasal drip & general sinus congestion and about supplements that may reduce cold symptoms.

I thought the B vitamins were all water soluble and did not build up in the body, so you would not build up toxic levels. Am I wrong?

Learn more about water-soluble B vitamins including niacin, B6, B12 and folic acid, and why taking too much of these vitamins can be toxic. See the symptoms of overdose and toxicity from B vitamins. ConsumerLab.com's answer explains.

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.

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

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

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.