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Showing Results for Thyroid Health

CL Answers (19)

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Are supplements such as Thyroid Care Plus helpful for hypothyroidism? Can supplements worsen thyroid function? And what is nascent iodine?

Learn about supplement ingredients such as iodine, selenium, zinc, acetyl-l-carnitine, ashwagandha and guggul used for thyroid conditions and find out if they are beneficial. Also learn why ingredients such as alpha-lipoic acid, soy, resveratrol, quercetin may impair thyroid function.

Woman holding various vitamins and supplements in one hand and glass of water in the other

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.

Elderly Woman Checking Thyroid Gland

I take levothyroxine (Synthroid), a thyroid hormone to treat hypothyroidism. Are there supplements I should avoid, or be taking, due to this drug?

Is taking certain supplements and hypothyroidism medications bad? Learn which supplements can interact with thyroid hormone medications like levothyroxine (Synthroid), thyroid hormone levels, and laboratory tests.

Levothyroxine (Synthroid) Supplement Interactions

Does Bacopa extract improve memory, mood, or sleep? Is it safe?

Find out if bacopa improves memory and cognition, mood or sleep, and whether it's been shown to be helpful in people with Alzheimer's disease or dementia. Plus, learn about the safety and common side effects of bacopa.

Bacopa for Memory and Cognition -- Bacopa leaves and powder

Do I need to divide my daily 300 mg dose of CoQ10 into smaller doses, or can I take it all at once?

Find out when to take CoQ10 supplements. Should you take CoQ10 at once, or in smaller doses? Understand the best way. ConsumerLab.com explains.

The Best Way to Take CoQ10 -- CoQ10 Supplement

Is it true that iodine can cause acne or other skin problems?

Information on iodine causing acne and other skin problems such as rashes and hives. ConsumerLab.com's answer explains.

Iodine Causing Acne & Rashes -- box of iodized salt

Adrenal Fatigue and Adrenal Support Supplements: Do they work and are they safe?

Find out what's really in supplements for adrenal support and adrenal fatigue, including herbal adrenal support supplements and bovine derived adrenal support supplements. Find out if they really work and if they are safe. ConsumerLab.com's answer explains.

Adrenal Fatigue and Adrenal Support Supplements -- Tired Woman Falling Asleep at Her Desk

Do biotin supplements really improve hair and nails?

Does Biotin really work for hair and nails? Find out about strengthening and growth for hair and nails.

Biotin Supplements for Hair and Nails -- woman looking at hair and nails in mirror

Are there drug interactions with magnesium supplements?

Find out about interactions between magnesium supplements and over-the-counter antacids and laxatives such as Maalox, antibiotics, and statins and diabetes medications. ConsumerLab’s answer explains.

Magnesium

Will 7-keto DHEA help me lose weight?

Learn more about 7-keto DHEA supplements for weight loss, including clinical results.

7-Keto DHEA for Weight Loss? -- supplement and pills on scale

Does Procera AVH really improve memory and mood?

Procera AVH information, including evidence from clinical studies on memory, cognition, mood, safety, and a lawsuit.

What are the side effects of ashwagandha supplements?

Learn about the safety and side effects of ashwagandha supplements, including headache, sleepiness, upset stomach, blood pressure and more. ConsumerLab.com's answer explains.

ashwagandha side effects

Do any supplements or foods help with migraine? Do any trigger migraine?

Find out if supplements such as magnesium, CoQ10, riboflavin, butterbur, feverfew and others help with migraine. Also learn about foods that may trigger migraine, including chocolate and watermelon.

Migraine

What are the health benefits of green tea, and is it safe?

ConsumerLab explains green tea's potential health benefits for everything from fighting cancer to helping your heart.

Cup of green tea with dried tea leaves

Which ingredients should toothpaste contain, and which should be avoided?

Learn about ingredients you want in your toothpaste and which ingredients you may want to avoid.

Toothpaste in the shape of question mark coming out from toothpaste tube

When choosing a protein powder, which protein source is best -- whey, casein, soy, pea, rice, hemp or egg?

Protein powder information including the various sources of protein, including whey, casein, soy, pea, rice, hemp and egg.

What are the best supplements for depression and anxiety?

Best natural supplements for depression and anxiety, including the evidence for fish oil, vitamin D, probiotics, and herbal supplements for depression such as curcumin (from turmeric) and saffron.

Best Supplements for Depression and Anxiety -- sad young woman sitting on couch, looking toward the window

Does Oral-B Glide or other dental floss contain toxic chemicals called PFAS? Where else are PFAS found, and how can I avoid them?

Some brands of dental floss, including Oral-B Glide, may contain potentially toxic chemicals known as PFAS (polyfluoroalkyl substances), according to one study. Get the details in ConsumerLab's answer.

Toxic PFAS Chemicals in Dental Floss -- Woman Looking at Dental Floss

What are trace minerals and do I need them?

Trace minerals include boron, chromium, copper, iodine, iron, manganese, molybdenum, nickel, zinc, and others. Find out what they do, how much of each trace mineral you should be getting, and who's most likely to be deficient in these minerals.

Trace Minerals - What are they and do you need them?
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Clinical Updates (13)

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6/21/2022

Thyroid Product Caution

Use of a popular thyroid product may interfere with important thyroid tests, according to recent reports. Get the details in our article about Supplements and Hypothyroidism.

11/20/2018

Soy Can Affect Thyroid

Daily intake of soy isoflavones (as found in soy protein and soy isoflavone supplements) can affect thyroid hormone levels — even in people with normal thyroid function, according to a recent study. For details, see the "Concerns and Cautions" section of the Menopause Supplements Review and the Protein Supplements Review.
1/12/2020

Concern With Ashwagandha
Ashwagandha can increase thyroid hormone levels, resulting in thyroid toxicity, even in people without a history of thyroid disease. Read about a recent case and learn symptoms to look for in the Concerns and Cautions section of the Ashwagandha Supplements Review. Also see our Top Pick among ashwagandha supplements.
2/01/2022

Vaccines, Blood Pressure, and Thyroid Symptoms
Find out if COVID-19 vaccines increase blood pressure or worsen symptoms of thyroid conditions.
6/20/2017

Warning: Biotin Can Affect Thyroid Tests
Vitamins that contain megadoses of biotin (vitamin B7) can affect thyroid tests, according to recent studies. This can lead to an incorrect diagnosis of hyperthyroidism and improper treatment. See the "Biotin" section of the B Vitamin Supplements Review >>
9/02/2017

Ashwagandha & Thyroid Function
Ashwagandha extract improved thyroid hormone levels in men and women with subclinical hypothyroidism in a new study. See the details in the "What It Does" section of our Ashwagandha Supplements Review -- which includes our Top Pick among ashwagandha supplements.
3/18/2022

Iodine Pills for Radiation Protection

Due to concerns relating to the safety of nuclear reactors and potential use of nuclear weapons in the war in Ukraine, demand for radioprotective iodine products has jumped.

Potassium iodide and potassium iodate can help protect the thyroid from the effects of radioactive iodine from the air, water, and foods after a nuclear event. But who should be taking these products, when should they be taken, and how much should be taken?

Find out in our review of Potassium Iodide and Iodate Radioprotective Pills, and see our Top Picks among products (and where to currently get them).

2/01/2022

Vitamin D & Autoimmune Disease
A major study suggests that supplementing with vitamin D may reduce the risk of some autoimmune diseases, such as rheumatoid arthritis. Fish oil may also have some benefit. But there are important caveats to the findings, and thyroid disease and psoriasis appear to be impacted. Use the above links for details.
11/05/2021

Fluoride and Hypothyroidism?
Can fluoride in toothpaste affect thyroid function? Find out what research suggests in our updated article about what to look for, or avoid, in toothpaste.
8/28/2021

Biotin Interference With COVID Tests
Be aware that taking biotin (vitamin B-7) may interfere with COVID-19 antibody tests. Learn which tests are affected. Also find out about other laboratory tests (including thyroid and cardiovascular tests) that can be affected by biotin.
4/21/2013

Does Ginkgo Cause Cancer?
According to a new study from the government, animals given an extract of Ginkgo biloba for two years developed cancers of the thyroid and liver. Should you be concerned? See the "Concerns and Cautions" section of the Ginkgo Biloba Supplements Review for more information, as well our assessment of ginkgo's usefulness, and our tests of ginkgo supplements
10/24/2020

How Good Is Generic Thyroid Medication?
How well do people with hypothyroidism do on generic versions of levothyroxine (Synthroid)? We've added new information about this to our article about levothyroxine and dietary supplements.
10/29/2018

Don't Take Calcium With Thyroid Hormone
A study showed negative effects of taking calcium too soon after taking levothyroxine (Synthroid). For details on how to safely take this combination, see the update in the Concerns and Cautions section of the Calcium Supplements Review. (Also see our Top Picks for calcium.)
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Recalls & Warnings (100)

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7/28/2020

Iron Supplements Recalled Due to Undeclared Allergen
3/05/2020

Protein Powder Recalled Due to Undeclared Milk
2/04/2020

Seller of Digestion Supplements Warned for Manufacturing Violations
11/09/2019

Biotin Supplements Can Cause False Lab Test Results
7/16/2019

FDA Warns Seller of Magnesium and CBD
12/01/2018

Seller of 5-HTP, Potassium & More Warned for Manufacturing Violations
11/19/2018

Jay Robb Egg White Protein Recalled

10/12/2018

Organic Plant Protein Shake Recalled
9/22/2018

MyoWhey Protein Powder Recalled
8/03/2018

Vanilla Almond Breeze Almond Milk Recalled
7/06/2018

Prescript-Assist Probiotic Recall Expanded
6/29/2018

Prescript-Assist Probiotic Recalled

5/12/2018

Seller of Astaxanthin, Cinnamon, Pine Bark and More Warned for Manufacturing Violations
4/27/2018

Labrada LeanPro8 Protein Powders Recalled Due to Allergen Risk
4/17/2018

FDA Warns Seller of Echinacea, Iron, Aloe Supplements & More for Manufacturing Violations
4/09/2018

Muscle and Recovery Supplements Recalled Due to Undeclared Milk
4/06/2018

Workout Supplements Recalled Due To Allergen Risk
2/27/2018

Testosterone, Thyroid, Other Supplements Recalled Due to Undeclared Milk
12/23/2017

Seller of Meal Replacement, Protein Drinks, Cranberry and More Warned for Manufacturing Violations
10/18/2017

FDA Warns Seller of Arthritis, Blood Pressure, Diabetes Supplements For Making Drug Claims
12/29/2015

Maker of Vitamin K, Vitamin A & More Warned for Manufacturing Violations, Drug Claims
12/16/2015

Maker of Red Yeast Rice, St. John's Wort, Valerian and More Warned for Manufacturing Violations, Drug Claims
11/18/2015

Seller of "Hangover" Supplement Warned for Manufacturing Violations & Drug Claims
11/07/2015

Seller of "NaturalDoctor" Vitamin C, Echinacea and More Warned for Manufacturing Violations
9/26/2015

Seller of Muscle Supplements and More Warned for Manufacturing Violations
9/05/2015

Maker of Multivitamin and Fish Oil Warned for Manufacturing Violations
8/23/2015

Maker of Herbal Supplements Sold on eBay, Amazon and Other Websites Shut Down
8/11/2015

Company Ordered to Stop Making and Selling Supplements
7/02/2015

Maker of Arthritis Supplement Warned for Manufacturing Violations, Drug Claims
6/26/2015

Seller of CoQ10, Anxiety Supplements and More Warned for Manufacturing Violations, Drug Claims
6/17/2015

Maker of Joint Supplement Warned for Manufacturing Violations
6/11/2015

FDA Warns Maker of Fruit Energy Drinks for Drug Claims
6/03/2015

Maker of B-12 Energy Supplement Warned for Manufacturing Violations
5/30/2015

Seller of Supplements for Herpes, Prostate Cancer & More Warned for Drug Claims
5/30/2015

Seller of Omega-3, Probiotics & SuperFoods Warned for Manufacturing Violations, Drug Claims
5/23/2015

Seller of Magnesium, Calcium, Silver and More Warned for Manufacturing Violations, Drug Claims
5/02/2015

Maker of Garcinia, Joint Supplements and More Warned for Manufacturing Violations, Drug Claims
3/10/2015

Seller of Vision Supplements Warned for Manufacturing Violations, Drug Claims
3/10/2015

Maker of Magnesium, Calcium, Zinc, B Vitamins and More Warned for Manufacturing Violations, Drug Claims
2/28/2015

Drugs Found in Male Enhancement Supplements

2/24/2015

Seller of Heart, Brain and Diabetes Supplements Warned for Drug Claims
2/24/2015

Seller of Antioxidant Water, Energy Drops Warned for Manufacturing Violations and Drug Claims
2/10/2015

Seller of "Natural" Cough Syrup Warned for Manufacturing Violations, Drug Claims
1/31/2015

Maker of Soy and Zinc Warned for Manufacturing Violations
1/27/2015

Seller of Aloe, Sexual Enhancement Supplements and More Warned for Manufacturing Violations, Drug Claims
1/23/2015

Maker of Vitamin Drinks Warned for Manufacturing Violations
1/21/2015

Supplement Maker Ordered to Stop Selling Products
1/17/2015

Supplement Maker Warned for Manufacturing Violations
1/17/2015

Maker of Magnesium and Potassium Supplements Warned for Manufacturing Violations
12/30/2014

Maker of Probiotic Supplement Warned for Manufacturing Violations
12/30/2014

Maker of Aloe, Weight Loss Supplements and More Warned for Manufacturing Violations, Drug Claims
12/12/2014

Seller of Omega-3 "Syrup" Warned for Manufacturing Violations and Drug Claims
12/12/2014

Seller of B-12, Zinc, Echinacea and More Warned for Manufacturing Violations and Drug Claims
12/05/2014

Maker of Ginseng, Zinc, Calcium and More Warned for Manufacturing Violations
12/02/2014

Seller of Energy & Joint Supplements, Aloe, Silver and More Warned for Drug Claims
11/28/2014

Seller of Herbal Extracts Warned for Manufacturing Violations, Drug Claims
11/21/2014

Seller of Diabetes, Prostate Supplements and More Warned for Manufacturing Violations, Drug Claims
11/11/2014

Maker of Children's Vitamins, Weight Loss Supplements and More Warned for Manufacturing Violations
11/11/2014

Seller of Sexual, Muscle Enhancement Supplements Warned for Manufacturing Violations and Drug Claims
11/06/2014

Seller of Prostate, Heart Supplements and More Warned for Drug Claims
11/06/2014

Seller of Cholesterol, Arthritis Supplements and More Warned for Drug Claims
11/03/2014

Mixing Medications and Dietary Supplements Can Be Dangerous, FDA Warns
10/31/2014

Seller of "Cleanse," Allergy Supplements and More Warned for Manufacturing Violations, Drug Claims
10/30/2014

Supplement Maker Warned for Manufacturing Violations
10/30/2014

Seller of Vitamin C, Iron and Detox Supplements Warned for Violations, Drug Claims
10/21/2014

Seller of Weight Loss Supplements Warned for Manufacturing Violations and Drug Claims
10/21/2014

Seller of Weight Loss, Saw Palmetto Supplements and More Warned for Drug Claims
10/16/2014

Seller of Black Cohosh, Ginkgo and More Warned For Manufacturing Violations and Drug Claims
10/10/2014

Seller of Multivitamin Warned for Drug Claims
10/03/2014

Seller of Green Tea, Prostate, Pain Supplements and More Warned for Manufacturing Violations and Drug Claims
9/26/2014

FDA Warns Seller of Supplements and Chocolate Promoted to Treat Ebola
9/26/2014

Sellers of Essential Oils Warned for Claiming to Treat Ebola, Other Diseases
9/26/2014

Seller Warned for Promoting Essential Oils to Treat Flu, MRSA, Measles and More
9/10/2014

Seller of Joint Pain Supplement Warned for Drug Claims
9/05/2014

Seller of "Nerve", "Cleanse" and Probiotic Supplements Warned for Drug Claims
8/26/2014

Supplement Maker Warned for Manufacturing Violations
8/26/2014

Seller of Immune Supplement Warned for Drug Claims
8/26/2014

Maker of Herbal Supplements Warned for Manufacturing Violations and Drug Claims
8/21/2014

Seller of Joint Supplement Warned for Manufacturing Violations and Drug Claims
8/08/2014

FDA Warns Puerto Rico Supplement Seller
8/06/2014

Seller of Mineral and Joint Supplements Warned for Manufacturing Violations and Drug Claims
8/02/2014

Judge Orders BioAnue To Stop Illegal Cancer and Disease Claims
7/15/2014

Vita Springs Health Warned for Manufacturing Violations and Drug Claims

7/15/2014

Pinnacle Labs International Warned for Manufacturing Violations
7/11/2014

Maker of Cough and Sleep "Remedies" Warned for Drug Claims

5/31/2014

Sellers of "Cancer" Supplements Warned for Drug Claims
5/30/2014

Seller of Brain, Diabetes, Echinacea Supplements and More Warned for Drug Claims
5/21/2014

Seller of Gingko and Milk Thistle Warned for Manufacturing Violations and Drug Claims
5/14/2014

Maker of Mood, Smoking Cessation Supplements and More Warned for Violations, Drug Claims
5/06/2014

Seller of Flaxseed, Ginkgo and More Warned for Manufacturing Violations and Drug Claims
4/16/2014

Seller of Aloe, Thyroid and Other Supplements Warned for Manufacturing Violations and Drug Claims
3/19/2014

Maker of Herbal Capsules and Extracts Warned for Manufacturing Violations
1/23/2014

Many Thyroid Supplements Contain Thyroid Hormones -- Risk of Thyrotoxicosis
8/02/2013

Vitamin B, Vitamin C and Multimineral Supplements Recalled Due To Anabolic Steroid Risk
7/28/2013

B Vitamin Supplement Found To Contain Anabolic Steroids
7/12/2013

Herbal Supplement Company Warned For Drug Claims, Manufacturing Violations

6/30/2013

Warning Over Excessive Iodine Intake From Supplements, Including Kelp
5/10/2013

Maker of Concentration, Pain, Immune, Cholesterol Supplements Warned For Drug Claims
4/23/2013

Seller of Digestion, Thyroid and Vitamin D Supplements Warned For Drug Claims
5/07/2012

FDA Warns Doctor Promoting Own Supplements Online as Treatments
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