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Can biotin supplements really strengthen nails or improve hair? Can other supplements help?

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

Supplements for Brittle Nails -- healthy nails

Can fluoride in toothpaste, mouth rinses or drinking water cause attention-deficit/hyperactivity disorder (ADHD) in children?

Find out if community water fluoridation increases the risk of attention-deficit/hyperactivity disorder (ADHD) in children, and learn what the American Dental Association recommends when using fluoride-containing toothpaste and mouth rinses in children.

Small amount of toothpaste being applied to a toothbrush with a glass of water in the background

Which ingredients should toothpastes and other dental products contain, and which should be avoided?

Learn about ingredients you want in your toothpaste, mouthwash and other dental products and which ingredients you may want to avoid.

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

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

Supplements for multiple sclerosis (MS): Do any supplements reduce symptoms or relapse?

Find out if vitamins or supplements such as ginkgo, fish oil, biotin, vitamins A, C, E, D, and B12, or selenium reduce symptoms or relapse in people with multiple sclerosis (MS).

MS 3
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