CL Answers

Is there evidence that d-limonene can help fight cancer?

Find out if d-limonene can help fight cancer or help for GERD (gastroesophageal reflux disorder), including evidence from clinical studies.

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 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.

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.

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.

Do any supplements help prevent or improve cataracts?

Find out which supplements may help with cataracts, including selenium and vitamins A, B1, B3, C, and E.

I am very concerned about getting too much vitamin A. Is there danger in getting too much vitamin A if I take fish oil, which I've heard contains a lot of vitamin A, in addition to my multivitamin?

Find out if taking vitamin A along with fish oil can lead to an excess of vitamin A and how to avoid vitamin A overdose.