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CL Answer

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.

Home Test COVID

Clinical Update

11/30/2021

Details About Omicron

Learn about the new Omicron variant, including if current viral tests can detect this variant and whether vaccinations may help protect against it.

Clinical Update

12/24/2021

Antigen Testing for Omicron

Find out which two brands of antigen tests have been verified to detect the Omicron variant based on ongoing testing conducted by the NIH.

Clinical Update

12/24/2021

Antigen Testing for Omicron

Find out which two brands of antigen tests have been verified to detect the Omicron variant based on ongoing testing conducted by the NIH.

Clinical Update

12/24/2021

Antigen Testing for Omicron

Find out which two brands of antigen tests have been verified to detect the Omicron variant based on ongoing testing conducted by the NIH.

Clinical Update

12/24/2021

Antigen Testing for Omicron

Find out which two brands of antigen tests have been verified to detect the Omicron variant based on ongoing testing conducted by the NIH.

Clinical Update

12/24/2021

Antigen Testing for Omicron

Find out which two brands of antigen tests have been verified to detect the Omicron variant based on ongoing testing conducted by the NIH.

Clinical Update

12/24/2021

Antigen Testing for Omicron

Find out which two brands of antigen tests have been verified to detect the Omicron variant based on ongoing testing conducted by the NIH.

CL Answer

Room Carbon Dioxide Monitors: A Good Way to Assess Room Ventilation and Reduce COVID Spread?

Learn about carbon dioxide monitors, including how they work, what to look for when buying a device, tips for using them, limitations, and which device is our Top Pick.

Monitor on a table

CL Answer

Is cinnamon dangerous for my liver? I put about a teaspoon of it in my oatmeal every day.

The most common form of cinnamon contains a naturally occurring liver toxin called coumarin. Find out how much cinnamon is safe to consume, and how often it can be consumed. Also learn how much coumarin ConsumerLab found in popular cinnamon and spices.

Liver Danger With Cinnamon -- Bowl of oatmeal with cinnamon and cinnamon sticks

CL Answer

How do the COVID-19 vaccines compare in terms of efficacy, safety and side effects? How, when and where do I get the COVID-19 vaccine?

Find out how the COVID-19 vaccines from Pfizer and Moderna compare and learn how when and where you can get the COVID-19 vaccine.

Older woman getting an injection

CL Answer

The distributor of my cacao powder says it checks for "metal fragments" in its products. Is this adequate to check for heavy metals, like cadmium and lead, that you've found in cocoas and chocolates?

Find out if tests such as foreign metal detection can show if cocoa powders and chocolate products are contaminated with heavy metals such as cadmium and lead. See amounts of these toxic heavy metals were found in cocoa and chocolate products tested by ConsumerLab.com

CL Answer

Can I use a home test for mercury to check for mercury in fish, like canned tuna, fresh fish, and sushi?

Find out if home mercury test kits can be used to test fish, such as canned tuna, fresh fish or sushi for mercury contamination. Plus, find out how much mercury ConsumerLab found in popular canned tuna and canned salmon. ConsumerLab.com's answer explains.

salmon filet with test tubes and beakers for mercury testing

Clinical Update

12/30/2021

Rapid Antigen Tests – How Good Are They?

The FDA changed what it was saying this week about the ability of rapid antigen tests, like Abbott BinaxNow and Quidel QuickVue, to detect the Omicron virus. Get the latest information and see our comparisons of 7 brands of antigen tests.

Clinical Update

11/18/2022

Curcumin and Allergy Tests

Does taking curcumin interfere with a test to detect allergies? Find out in the Concerns and Cautions section of our Curcumin and Turmeric Supplements & Spices Review.

Also, see our article about supplements that may interfere with laboratory tests.

Clinical Update

12/03/2021

Best Rapid Home Test for COVID

The FDA has authorized many 15-minute home tests for COVID, but some are better than others at identifying positive samples. See our Top Pick among rapid home tests and how brands compare.

Be aware that these home tests, which can be bought without a prescription, are best used within six days of the start of symptoms. It is likely that they can detect the new Omicron variant. The cost of buying these tests may soon be covered by insurance.

Clinical Update

8/03/2021

Tests to Detect COVID Variants?

Can standard COVID-19 tests identify which variant caused an infection? Find out in our updated CL Answer about tests for COVID-19.

CL Answer

Will the zinc challenge or taste test really tell if I'm zinc deficient?

Find out if the zinc challenge, also known as the zinc taste test, can accurately detect zinc deficiency. ConsumerLab.com's answer explains.

CL Answer

Which is the best pulse oximeter for home use?

Best pulse oximeter for home use (COVID-19, asthma and COPD). Differences between home use and FDA-approved medical pulse oximeters.

Best Pulse Oximeter for Home Use -- Pulse Oximeter

CL Answer

9 Supplements That May Help Reduce Nighttime Urination (And 4 That Might Not Help)

Waking up more than once during the night to use the bathroom? Learn more about the 9 supplements that may help and 4 others that don't.

A toilet in an empty bathroom at night

Product Review

Extra Virgin Olive Oil Review

Most Failed to Be Approved. Find the Best Extra Virgin Olive Oil and Avoid Problems.

Extra virgin olive oils reviewed by ConsumerLab.com

CL Answer

There are many reports of lead contamination in turmeric spice. How can I make sure I'm not getting lead in my turmeric supplement or spice?

Find out how to avoid contaminated curcumin and turmeric supplements and spices, and see our Top Picks in our Curcumin/Turmeric Product Review.

Lead Contamination in Turmeric Spice & Supplements -- Spoonful of turmeric spice and turmeric pills

CL Answer

What are the side effects of red yeast rice?

Find out which side effects can be caused by red yeast rice supplements that are taken to lower cholesterol levels. ConsumerLab.com's answer explains.

Red Yeast Rice Side Effects -- red yeast rice capsules and tablets

CL Answer

Which vitamins and supplements should be stopped before getting blood work and laboratory tests?

Find out which vitamins and supplements can interfere with blood, urine or stool tests, and imaginging tests. Learn how B vitamins such as biotin, niacin and riboflavin, as well as calcium supplements, St. John’s wort, vitamin C, and others supplements can affect test results, as well as common foods that may interfere with tests.

Vitamin & Supplements to Stop Before Blood Tests

News Release

10/19/2017

ConsumerLab.com Reveals Best Zinc Lozenges and Supplements for Shortening Colds and Correcting Deficiency

White Plains, New York, October 19, 2017 — In the U.S., mild zinc deficiency is fairly common. Zinc supplements can help to correct a deficiency, slow the progression of age-related macular degeneration, and have other benefits. Taken as a lozenge, zinc can shorten the duration of a cold.

News Release

3/31/2009

ConsumerLab.com Warns of Problems with Multivitamins and Vitamin Water -- Defects Found in Over 30% of Supplements Selected for Testing; Several Popular Children's Multis Exceed Tolerable Upper Intake Levels

WHITE PLAINS, NEW YORK — MARCH 31, 2009 — Over 30% of multivitamins recently selected for testing by ConsumerLab.com were found to contain significantly more or less ingredient than claimed or were contaminated with lead.

News Release

12/05/2005

Consumerlab.com reaffirms problems with Trimspa X32

Westchester, NY — December 5, 2005 — ConsumerLab.com responded today to a press release issued by TRIMSPA seeking to refute ConsumerLab.com's test results for TRIMSPA X32, a popular weight loss supplement. ConsumerLab.

Recalls & Warnings

8/16/2019

Lavender Oil Linked With Abnormal Breast Growth in Children

The use of products containing lavender oil has been linked to 16 cases of premature and/or abnormal breast development in girls and boys under the age of 8, according to a new report published in The Journal of Clinical Endocrinology & Metabolism.

News Release

4/22/2004

ConsumerLab.com shares insights from 2 years of testing supplements for athletic banned substances — Athletes and manufacturers urged to learn how to avoid problems

WHITE PLAINS, NY — April 22, 2004 — Two years after initiating the first program to test dietary supplements for substances banned from athletic competition, ConsumerLab.com today released a short advisory summarizing problems uncovered to-date from its testing.

Recalls & Warnings

3/03/2012

FDA Warns Vitaganic of Manufacturing Violations

On February 8, 2012, the U.S. FDA sent a Warning Letter to Vitaganic, Inc. regarding violations of Current Good Manufacturing Practic (CGMP) regulations for dietary supplements found during an inspection of it manufacturing facility in Sunnyvale, California in October 2011.

Recalls & Warnings

6/16/2009

FDA Warns of Loss of Sense of Smell with Zicam Nasal Gel/Nasal Swab

On June 16, 2009, the U.S. FDA warned consumers and healthcare professionals to discontinue use of three Zicam Nasal Gel/Nasal Swab products sold over-the-counter as cold remedies because they are associated with the loss of sense of smell that may be long-lasting or permanent.

Recalls & Warnings

6/05/2012

Many "Grapefruit Seed Extracts" Adulterated

On June 4, 2012, the American Botanical Council (ABC) announced the publication of a review of scientific literature regarding “grapefruit seed extracts,” raising concerns about apparent adulteration of products in the US and international marketplaces.

Recalls & Warnings

1/27/2003

FTC Charges Dr. Clark and Related Companies with Making Unsubstantiated Health Claims

The Federal Trade Commission has charged a Switzerland-based company and its U.S. counterpart with making numerous unsubstantiated efficacy claims for a variety of dietary supplements and devices that they sell on the Internet.

Recalls & Warnings

2/03/2015

Major Retailers Accused of Selling Adulterated Herbal Supplements

On February 3, 2015, the New York State Attorney General announced that his office sent letters to four major retailers, GNC, Target, Walmart, and Walgreens, for allegedly selling store brand herbal supplement products in New York that either could not be verified to contain the labeled substance, ...