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CL Answers (13)

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How can I find out where a vitamin or supplement is made and where its ingredients come from, such as China or the USA?

Learn more about the manufacturing, distribution, and ingredients of a supplement, including FDA regulations.

How to Find Out Where A Supplement Is Made -- Supplement Label

A blood test showed my vitamin D level is low. How do I know how much vitamin D to take?

Find out how to increase vitamin D blood levels, including a good target range.

Vitamin D

Can I get the new coronavirus (2019-nCoV) from supplements from China?

Information about catching the coronavirus from supplements from China, plus info on contamination with heavy metals like lead and more.

Coronavirus Risk With Supplements from China? -- 'Coronavirus' written on paper surrounded by supplements capsules and tablets

Can any supplements be used to reduce inflammation in people sensitive to NSAIDs such as ibuprofen, high-dose aspirin, or naproxen?

Find out if supplements such as turmeric, fish oil, MSM (methylsulfonylmethane), SAMe (S-adenosyl-methionine), boswellia, ginger, white willow bark or arnica may, or may not, be helpful to people sensitive to NSAIDs.

Woman with NSAID-hypersensitivity looking at two supplement containers and wondering if they are safe to take

How can I get tested for the coronavirus? Can I get an at-home test for COVID-19? Which are the best tests? Are any tests free?

Coronavirus (COVID-19) Tests: Where to get COVID-19 tests, including information about free testing, home testing and more. Information about SARS-CoV-2 virus tests, antibody tests and FDA approved tests.

Best COVID Tests, Accuracy, Where to Find & More -- Boy Getting COVID Test

What are the health benefits of zinc carnosine, also called polaprezinc, and is it safe?

Find out if zinc carnosine is beneficial for any GI conditions, including stomach ulcers, Helicobacter pylori infection, taste disturbances, aspirin-induced small-bowel injury and oral mucositis, and learn if it is safe.

Zinc carnosine supplements in wooden spoon in front of oysters

Can taking too much vitamin B-6 be dangerous? The label on my multivitamin states it contains 2000% of the Daily Value!

Find out if multivitamins contain excessive amounts of B-6, how much B-6 is too much, and symptoms of toxicity and overdose.

Which "whole food" multivitamins don't include synthetic vitamins? How about Complete Foods, Sunwarrior, Garden of Life, Nature's Brands, and Doctors' Research?

Find out which "whole food" multivitamins are only from foods and which include synthetic vitamins, including Complete Foods Nutrition-OctoMega MultiVitamin; Sunwarrior; Garden of Life-MyKind Organics; Nature's Brands-PhytoVitamins; Doctors' Research MultiVitamin.

Does Alpha Brain really improve memory, focus and cognition?

Find out if Alpha Brain really improves memory, focus and cognition. See the clinical evidence and get details about Alpha Brain ingredients, as well as potential side effects and drug interactions. ConsumerLab.com's answer explains.

Does-Alpha-Brain-Work?

Which is the best mask to prevent COVID-19 and how do cloth, disposable, N95, and KN95 masks compare? How can I stop glasses from fogging?

See our Top Picks for masks. Learn how to make COVID-19 masks from materials at home that can be almost as effective as surgical mask and N-95 masks.

How to buy or make the best mask, find the best KN95

Do hair loss supplements work, such as Viviscal?

Vitamins and supplements that may help with hair loss and thinning, including saw palmetto, beta-sitosterol, protein, iron, and vitamin D.

Supplements for Hair Loss -- woman looking at hairbrush

I take omeprazole (Prilosec), a proton pump inhibitor, to reduce stomach acid. Are there supplements I should avoid, or be taking, due to this drug?

Supplement interactions with proton pump inhibitor (PPI) drugs like omeprazole (Prilosec) and Nexium.

Does collagen taken as a supplement help with arthritis? I'm seeing it in products for joint health.

Learn more about collagen supplements, including evidence from clinical studies on arthritis and muscle strength and safety.

Collagen Supplements for Joint Pain
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Recalls & Warnings (21)

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8/21/2014

Seller of Joint Supplement Warned for Manufacturing Violations and Drug Claims
7/23/2016

Seller of GlucoCor Warned for Drug Claims
10/02/2009

FDA Raids Online Retailer for Supplements with Steroids
10/04/2016

Turmeric Spice Recalled Due to Elevated Lead Levels
2/03/2015

Major Retailers Accused of Selling Adulterated Herbal Supplements
3/28/2015

Settlement Restricts Label Claims for Certain Glucosamine Supplements
3/19/2009

QVC Settles Charges of False Claims for Supplements

8/28/2008

FDA Finds Fault with Generic Toprol XL -- Problems Reported Earlier by ConsumerLab.com
6/19/2008

FDA Warns Groups to Stop Selling Fake Cancer 'Cures'
7/26/2014

FTC Says Company Made "Outrageous" Weight Loss Claims

8/27/2013

FTC Refunds Consumers of Children's Vitamins as Part of Deceptive Advertising Settlement
2/06/2016

Marketers of Weight Supplements AF Plus and Final Trim Violated Consumer Protection Laws, Says FTC
10/21/2015

Imported Supplements Can Be Dangerous, FDA Warns
7/28/2020

Iron Supplements Recalled Due to Undeclared Allergen
4/17/2020

Joint Pain Supplement Isoprex Settles Charges of Making False Claims
6/19/2018

FDA Warns Seller of Weight Control Patches
9/19/2012

FDA Reports Arsenic in Rice Products -- Particularly Brown Rice
1/17/2006

FDA Warns Consumers about Brazilian Diet Pills Found to Contain Active Drug Ingredients
6/17/2004

FTC Challenges Deceptive Weight Loss Claims for Supplement Targeted at Hispanics
9/11/2015

Thirteen Manufacturers Ordered to Stop Selling Devil's Claw Supplements
1/20/2019

RXBAR Protein Bars Recalled
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Clinical Updates (2)

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1/18/2014

Vitamin D Helps Fibromyalgia
Fibromyalgia is an inflammation of the muscle and soft tissue which causes pain and fatigue. A recent study found that giving vitamin D reduced the pain associated with fibromyalgia. For details about the dose and target vitamin D blood level in the study, as well as our tests of vitamin D supplements, see the updated  Vitamin D Supplements Review >>   
6/10/2015

Do Plant Sterols Help?
Many studies have shown that taking plant sterols with meals can lower levels of LDL "bad" cholesterol. While that's a good thing, a recent study questions whether this reduces the risk of cardiovascular disease — the main target of treatment. Get the details in the "Concerns and Cautions" section of the Cholesterol-Lowering Supplements (Sterols and Policosanol) Review >>
Results
  1. Product Reviews
  2. CL Answers
  3. Recalls & Warnings
  4. Clinical Updates