Nature's Bounty Hair Skin & Nails has an average rating of 1.7 out of 10 from a total of 109 reviews on Drugs.com. 5% of reviewers reported a positive experience, while 91% reported a negative experience.

Supplements that promise to support the health of hair, skin and nails are growing in popularity, but they can come with “significant risk” and there's limited evidence to show they offer any benefits, dermatologists warn in a new analysis.

What are the side effects of Nature's Bounty Hair Skin & Nails (Multivitamins)? Get emergency medical help if you have signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat. When taken as directed, multivitamins are not expected to cause serious side effects.

In a clinical study, the active ingredient in Nature's Bounty® Optimal Solutions® Hair Growth was shown to help grow thicker, fuller hair in three months.*Individual results may vary.

No side effects have been reported for biotin in amounts up to 10 milligrams a day. However, check with your health care professional if you notice any unusual effects while you are taking it.

8 side effects of biotin supplements

• Digestive upset. Taking biotin may lead to stomach upset, such as cramping, stomach troubles and nausea [2].
• Acne.
• Insomnia.
• May interfere with results of thyroid function test.
• Skin rashes.
• Interaction with other drugs.
• Kidney problems.
• Excessive thirst.

Although the evidence to support biotin alone for hair growth is weak and limited, the evidence is slightly stronger for preventing hair loss. Still, biotin supplements are only likely to prevent hair loss and promote hair growth in people with a biotin deficiency.

In fact, in some cases supplementation may increase cancer risk. Many supplements marketed as skin, hair, and nail supplements contain high levels of micronutrients. Some contain high levels of vitamins A, B6, B12, E, and selenium, all of which have been associated with higher cancer risk in various groups.

Brand Credibility: Nature's Bounty is an affordable brand that doesn't sacrifice safety. Ingredient suppliers meet stringent quality assurance standards, says Lisa R.

Does biotin help prevent hair loss? Although the evidence to support biotin alone for hair growth is weak and limited, the evidence is slightly stronger for preventing hair loss. Still, biotin supplements are only likely to prevent hair loss and promote hair growth in people with a biotin deficiency.

When taken by mouth: Biotin is likely safe for most people when taken in doses up to 300 mg daily for up to 6 months. But it is more commonly used in lower doses of 2.5 mg daily. When applied to the skin: Biotin is likely safe for most people when applied in cosmetic products that contain up to 0.6% biotin.

There is no evidence that taking biotin causes kidney stones or leads to chronic kidney disease. However, high doses of biotin can produce false results for certain lab tests, including those for thyroid function and for hormone levels. Consult your doctor when you're considering taking biotin or any supplement.