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Showing Results for Nails

CL Answers (20)

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Can vitamin supplements strengthen brittle nails?

Learn more about strengthening brittle nails with vitamin B-7 (biotin), based on clinical evidence.

Supplements for Brittle Nails -- healthy nails

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

Do Sugar Bear Hair Vitamins make hair shine, nails stronger, and help both to grow? They taste good but are super expensive.

Info on Sugar Bear Hair vitamins. Do they make hair shine, nails stronger and help hair and nails grow? ConsumerLab.com's answer explains.

Do Sugar Bear Vitamins Work? -- bottle of Sugar Bear vitamins

What is the difference between cysteine and cystine?

Find out the difference between cysteine and cystine amino acids, including where each is found and their functions.

Does silica have health benefits? What is BioSil, and can it really increase collagen production and strengthen hair, skin, nails and bones?

Information about the health effects of silica (silicon dioxide) and orthosilicic acid (an ingredient in BioSil), including whether these forms of silicon can really increase collagen production, thicken hair, strengthen nails & bones.

Does BioSil Strengthen Hair, Skin and Nails? -- Bottle of BioSil

Does tea tree oil work for getting rid of athlete's foot?

Learn more about tea tree oil and its effects on foot fungus (known as athlete’s foot, tinea pedis, or “ringworm” due to the lesion that can occur) and how it can be as effective as some, but not all, over-the-counter antifungal treatments. ConsumerLab explains.

Tea Tree Oil for Athlete's Foot? -- Bottle of Tea Tree Oil

What are the signs of iron deficiency anemia?

Find out the signs and symptoms of iron deficiency anemia, such as fatigue, shortness of breath, rapid heartbeat and others.

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

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

How much bone broth do I need to consume in order to get a benefit?

Bone broth daily consumption information and benefits, including how much protein and collagen ConsumerLab found in popular products. ConsumerLab.com's answer explains.

How Much Bone Broth Should I Consume to Get a Benefit? -- Cup of Bone Broth

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

Do collagen or hyaluronic acid supplements really help aging or wrinkled skin?

Find out if collagen & hyaluronic acid supplements really help for aging or wrinkled skin and for skin care.

Collagen Supplements for Wrinkles? -- woman looking closely at her face in a mirror

Is there cause for concern with "gummy vitamins?" There are many different gummies out there. Are some better than others?

Learn more about gummy supplements, including those for multivitamins, vitamins C and D, calcium, and B vitamins.

Problems With Gummy Vitamins -- bottle of gummy vitamins

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.

B Vitamins

Which supplements can help treat anemia? Can any supplements cause a low red blood cell count?

Find out which vitamin and nutrient supplements can help prevent and treat anemia in people who are nutrient deficient and learn which supplements may cause low bleed cell counts, especially when used in excess.

Woman holding various vitamins and supplements in her hands

What is Perque Bone Guard Forté? It is safe and effective for bone health?

Find out about the ingredients in Perque Bone Guard Forté, including which ingredients may be beneficial for osteoporosis and bone health and which may be a safety concern.

Bottle of Perque Bone Guard Forte

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

What are the benefits of grape seed extract?

Learn about the health benefits of grape seed extract, and find out it improves venous insufficiency, leg swelling, swelling after surgery, or can help to lower blood pressure.

Benefits of Grape Seed Extract -- grapes and seeds

Which supplements are best for seasonal allergies?

Find out which supplements are best for allergies and can help reduce seasonal allergy symptoms, including bromelain, curcumin, vitamin D, and CLA.

Supplements for Seasonal Allergies -- Woman Outside Sneezing

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
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Recalls & Warnings (2)

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6/03/2008

Selenium Toxicity from a Supplement
11/09/2019

Biotin Supplements Can Cause False Lab Test Results

Clinical Updates (7)

Search term may appear only in full report available to members. Sign in or Join now for full access.

1/07/2020

Eggshell Membrane for Hair, Skin, Nails?
Does supplementing with eggshell membrane (which contains collagen and elastin) improve hair, skin, or nails? See what a recent study found in the What It Does section of the Collagen Supplements Review. Also see our Top Picks among collagen supplements.
5/22/2018

Hair & Nail Supplements Can Skew Lab Tests
There are reports of high-dose biotin (common in "hair and nail" supplements) causing false readings on blood tests. Be sure to tell your doctor if you're taking high-dose biotin. Get the details in the Biotin section of the B Vitamin Supplements Review.
12/05/2017

Biotin Interference With Vitamin D Test
Last week we reported that high doses of biotin (found in B complexes and hair and nail supplements) can interfere with certain blood tests. A study recently showed that biotin can also artificially inflate a test for vitamin D. Get the details in the "Biotin" section of the B Vitamin Supplements Review >>
11/28/2017

Growing Concern with Biotin Causing False Lab Results
Biotin (a B vitamin found in B-complex and hair and nail supplements) can interfere with laboratory results resulting in the missed diagnosis or misdiagnosis of cardiovascular and hormonal conditions, such as Graves' disease (a form of hyperthyroidism). Physicians and lab personnel may be unaware of this interference. For details, see the "Biotin" section of the B Vitamins Review >>
10/05/2021

Silica for Dental Implant Inflammation?
Can a form of silica typically promoted for hair, skin, nail and bone health also help reduce inflammation and bone loss around dental implants? See what a recent study found in our updated article about Silica Supplements.
3/25/2017

Right Dose of Vitamin D to Reduce Falls

As we've reported in the past, vitamin D can reduce falls in older people, but too much can increase falls. A new study helps nail down the ideal dose and blood level to reduce falls. For details, see the "What It Does" section of the Vitamin D Supplements Review >>
8/10/2021

Pulse Oximeter Accuracy
Can you get an accurate pulse oximeter measurement while wearing nail polish?

Also learn how to get the most accurate reading with pulse oximeters and see our choice for best home pulse oximeter.
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Results
  1. Product Reviews
  2. CL Answers
  3. Recalls & Warnings
  4. Clinical Updates
  5. News Releases