What are some natural cures for brittle fingernails?

Biotin. Biotin is an oral supplement that helps strengthen skin, hair and nails. Usually a vitamin store can help you with proper dosage.

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What's a natural cure fix 4 brittle fingernails?

First.... ..Make sure there is no underlying internal cause, such as an under- or over-active thyroid. Then, keep your hands away from soap and water and harsh chemicals as much as possible. Take biotin (one of the b vitamins), about 5000 units per day. Eat a healthy diet. That's about as natural as it gets.